Respiration in Plants MCQs* (90 Q)

 

Question:   From NCERT NEET 2021  

Which of the following statements is incorrect? 

1. ATP is synthesized through complex V.

2. Oxidation-reduction reactions produce proton gradient in respiration. 

3. During aerobic respiration, the role of oxygen is limited to the terminal stage. 

4. In ETC (Electron Transport Chain), one molecule of NADH+H+ gives rise to 2ATP molecules, and one FADH2 gives rise to 3 ATP molecules.

 Answer ▽ 

4

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Question:   From NCERT NEET 2020  

The number of substrate level of phosphorylations in one turn of citric acid cycle is

1. One

2. Two

3. Three

4. Four

 Answer ▽ 

1

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Question:   From NCERT NEET 2020  

Pyruvate dehydrogenase activity during aerobic respiration requires :-

1. Calcium

2. Iron

3. Cobalt

4. Magnesium

 Answer ▽ 

4

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Question:   From NCERT NEET 2019  

Respiratory Quotient (RQ) value of tripalmitin is:

1. 0.09

2. 0.9

3. 0.7

4. 0.007

 Answer ▽ 

3

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Question:   From NCERT NEET 2018  

Which of these statements is incorrect?

1. Enzymes of TCA cycle are present in mitochondrial matrix.
2. Glycolysis occurs in cytosol.
3. Glycolysis operates as long as it is supplied with NAD that can pick up hydrogen atoms.
4. Oxidative phosphorylation takes place in outermitochondrial membrane.

 Answer ▽ 

4

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Question:   From NCERT NEET 2017  

Which statement is wrong for Krebs' cycle?

1. There are three points in the cycle where NAD+ is reduced to NADH + H+
2. There is one point in the cycle where FAD+ is reduced to FADH2
3. During conversion of succinyl Co-A to succinic acid, a molecule of GTP is synthesised
4. The cycle starts with condensation of acetyl group (acetyl Co-A) with pyruvic acid to yield citric acid

 Answer ▽ 

4

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Question:   From NCERT NEET 2016  

Which of the following biomolecules is common to respiration-mediated breakdown of fats, carbohydrates and proteins?

(1) Glucose -6-phosphate

(2) Fructose 1,6-bisphosphate

(3) Pyruvic acid

(4) Acetyl Co-A

 Answer ▽ 

4

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Question:   From NCERT NEET 2016  

Oxidative phosphorylation is

(1) formation of ATP by transfer of phosphate group from a substrate to ADP

(2) oxidation of phosphate group in ATP

(c) addition of phosphate group to ATP

(4) formation of ATP by energy release from electrons removed during substrate oxidation.

 Answer ▽ 

4

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Question:   From NCERT NEET 2009  

Aerobic respiratory pathway is appropriately termed 

1. catabolic 

2. parabolic 

3. amphibolic 

4. anabolic 

 Answer ▽ 

3

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Question:   From NCERT NEET 2008  

The chemiosmotic coupling hypothesis of oxidative phosphorylation proposes that Adenosine Triphosphate (ATP) is formed because

(1) high energy bonds are formed in mitochondrial proteins

(2) ADP is pumped out of the matrix into the intermembrane space

(3) a proton gradient forms across the inner membrane

(4) there is a change in the permeability of the inner mitochondrial membrane toward Adenosine Diphosphate (ADP)

 Answer ▽ 

3

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Question:   From NCERT  Derived PYQ 

For each ATP produced, how many H passes through F0 from the intermembrane space to the matrix down the electrochemical proton gradient?

1. 1
2. 2
3. 3
4. 4

 Answer ▽ 

2

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Question:   From NCERT  Derived PYQ 

In Krebs' cycle GTP is formed in

1. substrate level phosphorylation

2. oxidative phosphorylation

3. non-cyclic photophosphorylation

4. cyclic photophosphorylation

 Answer ▽ 

1

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Question:   From NCERT Derived PYQ  AIIMS - 2011

After glycolysis, fate of glucose in mitochondrial matrix is

(1) oxidation

(2) reduction

(3) oxidative decarboxylation

(4) hydrolysis.

 Answer ▽ 

3

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Question:   From NCERT  Derived PYQ  AIIMS - 2017

Which one is correct sequence occuring in glycolysis?
(1) G-6-P $\to$PEP $\to$3-PGAL $\to$3-PGA

(2) G-6-P $\to$3-PGAL $\to$ 3-PGA $\to$PEP

(3) G-6-P $\to$PEP $\to$3-PGA $\to$3-PGAL

(4) G-6-P $\to$3-PGA $\to$3-PGAL $\to$PEP

 Answer ▽ 

2

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Question:   From NCERT   Derived PYQ  AIIMS - 2016

In which of the following reactions of glycolysis, a molecule of water is removed from the substrate?
(a) Glucose $\to$ Glucose-6-phosphate
(b) Fructose-6-phosphate $\to$ Fructose-1,6 bisphosphate
(c) 2-phosphoglycerate $\to$Phosphoenol pyruvate
(d) Phosphoenol pyruvate $\to$Pyruvate

 Answer ▽ 

c

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Question:   From NCERT   Derived PYQ 

RQ (Respiratory Quotient) is defined as

(1) $\mathrm{Volume}\mathrm{of}{\mathrm{CO}}_2\mathrm{evolved}=\mathrm{Volume}\mathrm{of}{O}_2\mathrm{consumed}$

(2) $\frac{\mathrm{Volume}\mathrm{of}{O}_2\mathrm{consumed}}{\mathrm{Volume}\mathrm{of}{\mathrm{CO}}_2\mathrm{evolved}}$

(3) $\frac{\mathrm{Volume}\mathrm{of}{\mathrm{CO}}_2\mathrm{evolved}}{\mathrm{Volume}\mathrm{of}{O}_2\mathrm{consumed}}$

(4) $\frac{\mathrm{Volume}\mathrm{of}{O}_2\mathrm{evolved}}{\mathrm{Volume}\mathrm{of}{\mathrm{CO}}_2\mathrm{consumed}}$

 Answer ▽ 

3

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Question:   From NCERT   Derived PYQ 

Which of the following act as a respiratory substrate under certain conditions in the plant-animal?

(1) Glucose

(2) Starch

(3) Protein

(4) Carbohydrate

 Answer ▽ 

3

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Question:   From NCERT   Derived PYQ 

Which of the following act as respiratory substrate under certain conditions in the plant?

(1) Protein

(2) Organic Acid

(3) Fats

(4) All of these

 Answer ▽ 

4

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Question:   From NCERT   Derived PYQ 

The complete combustion of glucose

(1) Most of which is given out in the form of ATP

(2) Most of which is given out in the form of heat

(3) Most of which is given out in the form of NADH

(4) Most of which is given out in the form of FADH2

 Answer ▽ 

2

This-question _ directly - NCERT _line- 228 - Xlth .        .

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Question:   From NCERT   Derived PYQ 

Plant respiration:

Find the odd one out.

(1) Glucose is dervied from the end result of photosynthesis i.e. sucrose

(2) Invertase acts on sucrose to release out glucose and fructose

(3) Glucose and sucrose are Phosphorylated in the presence of Hexokinase

(4) The steps of glycolysis from third step onwards, are same for glucose and fructose

 Answer ▽ 

3

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Question:   From NCERT   Derived PYQ 

The energy utilizing step of glycolysis is..…

(1) 1st and 3rd steps

(2) 3rd step only

(3) Last step only

(4) 1st step only

 Answer ▽ 

1 - From fig.14.1

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Question:   From NCERT   Derived PYQ 

When does NADH is produced in cellular respiration?

(1) Conversion of PGAL to PGA

(2) Conversion of PGAL to DHAP

(3) Conversion of PGAL to BPGA

(4) Conversion of BPGA to PGA

 Answer ▽ 

3

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Question:   From NCERT   Derived PYQ 

The source of phosphorus in conversion of PGAL to BPGA is

(1) Inorganic Phosphate

(2) ATP

(3) ADP

(4) AMP

 Answer ▽ 

1    

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Question:   From NCERT   Derived PYQ 

The conversion of PGAL to BPGA, results in

(1) Production of NAD+

(2) Removal of two redox equivalents in the form of two hydrogen ions

(3) Removal of two redox equivalents in the form of two hydrogen atoms

(4) Production of 2C compound

 Answer ▽ 

3

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Question:   From NCERT   Derived PYQ 

The step of Glycolysis where NADH is produced actually results in
P.Oxidation of PGAL
Q.Reduction of NAD+
R.Production of BPGA
S.Use of Inorganic phosphate
T. Production of NADH+ H+
1. PQRST
2. QRS
3. RST
4. PRS

 Answer ▽ 

1

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Question:   From NCERT   Derived PYQ 

The energy yielding steps of glycolysis are

(1) Conversion of PGA to BPGA and Conversion of PGAL to DHAP

(2) Conversion of PGAL to PGA and Conversion of BPGA to PGA

(3) Conversion of BPGA to PGA and Conversion of PEP to Pyruvate

(4) Conversion of pyruvate to PEP and PGAL to DHAP

 Answer ▽ 

3

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Question:   From NCERT Derived PYQ 

What is the total amount of ATP produced in Glycolysis?

(1) 4

(2) 2

(3) 6

(4) 8

 Answer ▽ 

1

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Question:   From NCERT   Derived PYQ 

Fermentation can take place in

(1) Anaerobic conditions in many prokaryotes and unicellular Eukaryotes

(2) Humans

(3) Cancer cells

(4) All of these

 Answer ▽ 

4

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Question:   From NCERT   Derived PYQ 

Which of the following acts as a reducing agent in Fermentation?

(1) NADH + H+

(2) NAD+

(3) Lactate

(4) Alcohol

 Answer ▽ 

1

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Question:   From NCERT Derived PYQ 

In Fermentation

(1) The amount of energy trapped in the form of ATP is 7per cent of the energy in Glucose

(2) The amount of energy trapped in the form of ATP is more than 7 per cent of the energy in Glucose

(3) The amount of energy released is less than 7 per cent of the energy stored in Glucose

(4) The amount of energy released is more than 7 per cent of the energy stored in Glucose

 Answer ▽ 

3

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Question:   From NCERT   Derived PYQ 

The events of Aerobic Respiration include:
p. The complete oxidation of Pyruvate by the stepwise removal of all the hydrogen atoms leaving two molecules of Carbon-dioxide
q. The passing on of the electrones removed as part of the Hydrogen atoms to molecular oxygen with simultaneous synthesis of ATP
r. Pyruvate is transported from Cytoplasm to Matrix
s. Two events of Aerobic Respiration takes place within mitochondria.
t. The first process takes place in the matrix of mitochondria while second process is located on the inner membrane of mitochondria

The correct ones are
1. pqrst
2. qrst
3. pqrs
4. prs

 Answer ▽ 

2

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Question:   From NCERT   Derived PYQ 

The enzyme Pyruvate dehydrogenase acts in

(1) Mitochondrial membranes

(2) Cytoplasm

(3) Peri mitochondrial space

(4) Mitochondrial Matrix

 Answer ▽ 

4

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Question:   From NCERT  Derived PYQ 

The reaction which is catalyzed by Pyruvate dehydrogenase includes except

(1) Several coenzymes

(2) NAD+

(3) Coenzyme A

(4) ADP

 Answer ▽ 

4

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Question:   From NCERT   Derived PYQ 

First step of decarboxylation in cellular respiration occurs in

(1) Cytoplasm

(2) Mitochondrial membranes

(3) Mitochondrial Matrix

(4) Peri mitochondrial space

 Answer ▽ 

3

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Question:   From NCERT  Derived PYQ 

The first step of decarboxylation in cellular respiration is

(1) Conversion of PGAL to DHAP

(2) Conversion of PGAL to PGA

(3) Conversion of Pyruvate to Acetyl CoA

(4) Conversion of BPGA to PGA

 Answer ▽ 

3

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Question:   From NCERT   Derived PYQ 

From citrate to alpha-ketoglutarate in TCA cycle all the following reactions happen except

(1) Isomerization

(2) Decarboxylation

(3) Release of Carbon-dioxide

(4) FADH2 formation

 Answer ▽ 

4

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Question:   From NCERT   Derived PYQ 

In a coupled reaction,....... is converted to …...with the simultaneous synthesis of ….…...from ……( The reaction of Krebs’ Cycle of cellular respiration)

(1) GDP,GTP,ADP, ATP

(2) GTP,GDP, ATP, ADP

(3) ADP,ATP, GDP,GTP

(4) ATP, ADP, GDP, GTP

 Answer ▽ 

2

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Question:   From NCERT   Derived PYQ 

How many ATPs are net gained till the completion of Krebs’ cycle during breakdown of one molecule of Glucose?

(1) 4 ATPs in Glycolysis and 1 GTP in Krebs’ Cycle

(2) 4 ATPs in Glycolysis and 2 GTP in Krebs’ Cycle

(3) 2 ATPs in Glycolysis and 2 GTP in Krebs’ Cycle

(4) 2 ATPs in Glycolysis and 1 GTP in Krebs’ Cycle

 Answer ▽ 

3

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Question:   From NCERT   Derived PYQ 

For the continuation of TCA, it needs except?

(1) Regeneration of NAD+ and FAD+

(2) Replenishment of Oxaloacetate

(3) Regeneration of GTP

(4) Both B and C

 Answer ▽ 

3

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Question:   From NCERT   Derived PYQ 

If one wants to write a whole reaction of Krebs’ cycle, then how many water molecules are utilizing in net calculation?

(1) Two

(2) One

(3) Three

(4) Four

 Answer ▽ 

1

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Question:   From NCERT   Derived PYQ 

During cellular breakdown of one molecule of Glucose, How many NADH are produced in Matrix?

(1) 6

(2) 3

(3) 8

(4) 4

 Answer ▽ 

3

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Question:   From NCERT  Derived PYQ 

During cellular breakdown of one molecule of Glucose, How many NADH are produced in total?

(1) 10

(2) 8

(3) 6

(4) 4

 Answer ▽ 

1

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Question:   From NCERT   Derived PYQ 

FADH2 is oxidized by

(1) Complex I

(2) Complex II

(3) Complex III

(4) Complex IV

 Answer ▽ 

2

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Question:   From NCERT Derived PYQ 

Cytochrome c includes except

(1) Mobile carrier

(2) Present on outer surface of inner membrane

(3) Acts as mobile carrier for transfer of electrones between complex III and IV

(4) Transfers electrones from complex II to complex III as well

 Answer ▽ 

4

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Question:   From NCERT   Derived PYQ 

Complex IV is not

(1) Cytochrome C oxidase

(2) Cytochrome a and a3

(3) Two copper centre

(4) One cytochrome C1

 Answer ▽ 

4

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Question:   From NCERT  Derived PYQ 

Complex III has

(1) Cytochrome b

(2) Cytochrome C

(3) Copper centres

(4) Cytochrome a3

 Answer ▽ 

1

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Question:   From NCERT   Derived PYQ 

The order of electron transport is

(1) Complex l- Complex III- Complex IV- Complex V

(2) Complex lI- Complex III- Complex IV- Complex V

(3) Complex l- Complex III- Complex IV

(4) Complex l- Complex II- Complex IV- Complex V

 Answer ▽ 

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Question:   From NCERT   Derived PYQ 

Which of the following sequence is correct for Electron Transport where electrones are coming from NADH?

(1) FMN-FeS-UQ-UQH2-Cytb-Fe-S-Cytochrome C1- Cytochrome C- FeS-CuA- cyta- cyta3-CuB-Oxygen

(2) FMN-FeS-UQ-UQH2-Cytb-Fe-S-Cytochrome C1- Cytochrome C- CuA- cyta- cyta3-CuB-Oxygen

(3) FMN-FeS-UQ-UQH2-Cytb-Fe-S-Cytochrome C1- Fe-S-Cytochrome C- CuA- cyta- cyta3-CuB-Oxygen

(4) FMN-FeS-UQ-UQH2-Cytb-Fe-S-Cytochrome C1-FAD- Cytochrome C- CuB cyta- cyta3-CuA-Oxygen

 Answer ▽ 

2

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Question:   From NCERT   Derived PYQ 

Which of the following sequence is correct for Electron Transport where electrones are coming from FADH2?

(1) FMN-FeS-UQ-UQH2-Cytb-Fe-S-Cytochrome C1- Cytochrome C- FeS-CuA- cyta- cyta3-CuB-Oxygen

(2) FAD-FeS-UQ-UQH2-Cytb-Fe-S-Cytochrome C1- Cytochrome C-CuA- cyta- cyta3-CuB-Oxygen

(3) FMN-FeS-UQ-UQH2-Cytb-Fe-S-Cytochrome C1- Cytochrome C-CuA- cyta- cyta3-CuB-Oxygen

(4) FMN-FAD-FeS-UQ-UQH2-Cytb-Fe-S-Cytochrome C1- Cytochrome C- FeS-CuA- cyta- cyta3-CuB- water

 Answer ▽ 

2

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Question:   From NCERT   Derived PYQ 

Which of the following complex is involved in the transfer of 4 hydrogen ions across the mitochondrial membrane?

(1) Complex I

(2) Complex II

(3) Complex V

(4) Complex IV

 Answer ▽ 

1

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Question:   From NCERT Derived PYQ 

Which of the following complex is involved in the transfer of 2 hydrogen ions across the mitochondrial membrane?

(1) Complex I

(2) Complex II

(3) Complex III

(4) Complex IV

 Answer ▽ 

4

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Question:   From NCERT  Derived PYQ 

Which of the following complex is not involved in the transfer of electrones in the inner membrane but transfer of protons across the membrane to matrix?

(1) Complex I

(2) Complex II

(3) Complex III

(4) Complex V

 Answer ▽ 

4

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Question:   From NCERT   Derived PYQ 

Which of the following complex does not allow transfer of Protons across the mitochondrial membrane but transfer of electrones in the inner membrane?

(1) Complex II

(2) Complex III

(3) Complex IV

(4) Complex I

 Answer ▽ 

1

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Question:   From NCERT   Derived PYQ 

During ETC and Oxidative Phosphorylation, the number of ATP molecules produced depend on

(1) The nature of complex involved

(2) The nature of Electron donor

(3) The maximum electrons one reducing equivalents can give

(4) The speed of oxidation

 Answer ▽ 

2

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Question:   From NCERT   Derived PYQ 

Why does oxygen is important for complete oxidation of Glucose?

(1) Because it is limited to the terminal stage of the process

(2) Because it drives the whole process by removing hydrogens from the system

(3) It acts as the final hydrogen acceptor not the Electron acceptor

(4) Both B and C

 Answer ▽ 

2

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Question:   From NCERT   Derived PYQ 

Why do we call it oxidative Phosphorylation?

(1) Because of the presence of oxygen

(2) Because here proton gradient is maintained by the energy of oxidation and reduction

(3) Because of the presence of ADP and oxygen

(4) Because of the presence of Phosphorylation derived by oxygen

 Answer ▽ 

2

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Question:   From NCERT  Derived PYQ 

Which of the following gradient is observed in ETS?

(1) Chemical

(2) Electrical

(3) Osmotic

(4) Electrochemical

 Answer ▽ 

4

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Question:   From NCERT   Derived PYQ 

Glycerol and Fatty acids are the result of breaking down of Fats:

(1) Fatty acids enter at the step of formation of BPGA

(2) Fatty acids enter as acetyl CoA

(3) Fatty acids enter as PGAL

(4) Fatty acids enter as Pyruvate

 Answer ▽ 

2

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Question:   From NCERT   Derived PYQ 

Glycerol and Fatty acids are the result of breaking down of Fats:

(1) Fatty acids enter at the step of formation of BPGA

(2) Glycerol enter as acetyl CoA

(3) Glycerol enter as PGAL

(4) Fatty acids enter as Pyruvate

 Answer ▽ 

3

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Question:   From NCERT   Derived PYQ 

The individual amino acid enter the respiratory pathway at

(1) Within Krebs’ cycle

(2) As Pyruvate or Acetyl CoA

(3) As PGAL

(4) Both A and B

 Answer ▽ 

4

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Question:   From NCERT   Derived PYQ 

Tripalmitin

Which of the following is wrong?

(1) A fatty acid

(2) C51 H98 O6

(3) C48 H96 O5

(4) Both A and C

 Answer ▽ 

3

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Question:   From NCERT  Derived PYQ 

How many Carbon-dioxide are evolved in respiration of two molecules of Tripalmitin?

(1) 102

(2) 145

(3) 98

(4) 6

 Answer ▽ 

1

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Question:   From NCERT   Derived PYQ 

How many Oxygen are used in the respiration of  two molecules of Tripalmitin?

(1) 145

(2) 102

(3) 98

(4) 6

 Answer ▽ 

1

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Question:   From NCERT   Derived PYQ 

The RQ of a substrate is found to be 0.9 what would be that substrate?

(1) Carbohydrate

(2) Fatty Acid

(3) Lipid

(4) Protein

 Answer ▽ 

4

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Question:   From NCERT  Derived PYQ 

Which of the following is not correct?

(1) In living organisms, respiratory substrates are often more than one

(2) Pure proteins and fats can also be used as respiratory substrate

(3) Fermentation takes place under anaerobic conditions in many prokaryotes, unicellular Eukaryotes and in germinating seeds

(4) Oxygen is the ultimate acceptor of electrones and it gets reduced to water

 Answer ▽ 

2

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Question:   From NCERT Derived PYQ 

In the given diagrammatic representation of ATP synthesis in mitochondria, A, B and C are respectively:

1. 2 $H^{+}$, $F_0$ and $F_1$
2. 2 $H^{+}$, $F_1$ and $F_0$
3. 4 $H^{+}$, $F_0$ and $F_1$
4. 4 $H^{+}$, $F_1$ and $F_0$

 Answer ▽ 

1

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Question:   From NCERT  Derived PYQ 

Chemiosmotic theory of ATP synthesis in the chloroplasts and mitochondria is based on? क्लोरोप्लास्ट और माइटोकॉन्ड्रिया में एटीपी संश्लेषण का रसायन परासरण सिद्धांत इस पर आधारित है? 

a) Proton gradient 

b) Accumulation of K ions 

c) Accumulation of Na ions 

d) Membrane potential 

 Answer ▽ 

a

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Question:   From NCERT   Derived PYQ 

Adenosine diphosphate contains? एडेनोसिन डाई फास्फेट में होता है? 

a) One high energy bond 

b) Two high energy bond 

c) Three high energy bond 

d) Four high energy bond

 Answer ▽ 

1

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Question:   From NCERT   Derived PYQ 

Mechanism of aerobic respiration was discovered by? वायुवीय श्वसन के तंत्र को इनके द्वारा खोजा गया था? 

a) Kreb's 

b) Calvin 

c) Hatch and Slack 

d) Pasteur

 Answer ▽ 

a

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Question:   From NCERT   Derived PYQ 

 Chemiosmotic mechanism of ATP synthesis was proposed by? एटीपी संश्लेषण का केमिओस्मोटिक सिद्धांत इनके द्वारा प्रस्तावित किया गया था?

 a) Warberg 

b) Dickens

 c) Kreb's 

d) P. Mitchell 

 Answer ▽ 

d

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Question:   From NCERT   Derived PYQ 

Respiration is an? श्वसन एक है? 

a) Endothermic process 

b) Exothermic process 

c) Anabolic process 

d) Endergonic process

 Answer ▽ 

b

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Question:   From NCERT  Derived PYQ 

 Answer ▽ 

d

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Question:   From NCERT   Derived PYQ 

Which group of the following scientists discovered the EMP pathway of glycolysis? निम्नलिखित वैज्ञानिकों के किस समूह ने ग्लाइकोलाइसिस के ईएमपी मार्ग की खोज की? 

a) Embden, Meyerhof and Parnas 

b) Emerson, Hoffman and Peterson 

c) Embden, Morrison and Pitcher 

d) Avery, McLeod and McCarthy 

 Answer ▽ 

1

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Question:   From NCERT   Derived PYQ 

The aerobic respiration yields? वायुवीय श्वसन से प्राप्त होता है 

a) 8NADH2, 2FADH2, 2ATP 

b) 10 NADH2, 2FADH2, 38 ATP

 c) 12 NADH2, 30ATP, H2O 

d) 10NADH2, 2FADH2, 2GTP, 2ATP

 Answer ▽ 

d

Aerobic respiration yields 10 NADH2, 2FADH2, 2GTP and 2ATP resulting into, 10NADH2 = 10 Χ 3 = 30 ATP , 2FADH2 = 2 Χ 2 = 4 ATP, 2GTP = 2 Χ 1 = 2 ATP, 2 ATP = 2 Χ 1 = 2 ATP , 38 ATP

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Question:   From NCERT  Derived PYQ 

During respiration? श्वसन के दौरान?

 a) 2 PGAL produced during glycolysis and none of the PGAL produced in Kreb's cycle 

b) 2 PGAL produced during glycolysis and 4 Pyruvic acid produced in Kreb's cycle 

c) 2 PGAL consumed during glycolysis and 2 Pyruvic acid are produced in Kreb's cycle 

d) PGAL is not produced during glycolysis but seen in kreb cycle

 Answer ▽ 

a

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Question:   From NCERT  Derived PYQ 

The product formed by malic dehydrogenase is? मैलिक डीहाइड्रो जनेज के द्वारा निर्मित उत्पाद है? 

a) Malic acid

 b) Fumeric acid 

c) Oxaloacetic acid 

d) Succinic acid

 Answer ▽ 

c

Malate is dehydrogenated or oxidised through the agency of malate dehydrogenase to produce oxaloacetate. 

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Question:   From NCERT   Derived PYQ 

The main purpose of electron transport chain is to? इलेक्ट्रॉ न परिवहन श्रृंखला का मुख्य उद्देश्य है? 

a) Cycle NADH + H+ back to NAD+ 
b) Use the intermediates from TCA cycle
 c) Breakdown pyruvate 
d) All of these

 Answer ▽ 

a

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Question:   From NCERT   Derived PYQ 

Which of the following conversions represents a reduction reaction? निम्नलिखित में से कौन सा अपचायक अभिक्रिया को दर्शाता है? 
a) Pyruvate → Acetyl CoA 
b) NADH + H+ → NAD + 2H  
 c) 3 PGAld → Pyruvate 
d) Acetaldehyde → Ethanol 

 Answer ▽ 

d

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Question:   From NCERT   Derived PYQ 

 Kreb's Cycle is considered as amphibolic because of facts as follows? क्रेब चक्र को इन तथ्यों के कारण उभयधर्मी माना जाता है?
 a) The intermediates of the cycle are used as precursors in the biosynthesis of many compounds 
b) It is sole process to produce ATP
 c) It is the oxidation of acetyl CoA in CO2 and H2O
 d) a and c

 Answer ▽ 

d

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Question:   From NCERT   Derived PYQ 

 Why does NADH donates electrons to the beginning of the electron transport chain, whereas FADH2 donates electrons to the middle of the chain? NADH इलेक्ट्रॉ न परिवहन श्रृंखला की शुरुआत में इलेक्ट्रॉ नों का दान क्यों करता है, जबकि FADH2 श्रृंखला के मध्य में इलेक्ट्रॉ नों का दान करता है? 

a) FADH2 is more rapidly oxidized than NADH.

 b) NADH has more electrons to donate than FADH2. 

c) FADH2 has more reducing potential than NADH. 

d) NADH has more potential energy than FADH2. 

 Answer ▽ 

d

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Question:   From NCERT  Derived PYQ 

How many ATP are produced by the complete oxidation of two molecules of isocitrate by ETS only? ETS द्वारा केवल आइसोसिट्रेट के दो अणुओं के पूर्ण ऑक्सीकरण से कितने एटीपी का उत्पादन किया जाता है? 

a) 24 b) 11 c) 30 d) 22

 Answer ▽ 

d

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Question:   From NCERT   Derived PYQ 

Number of oxygen atoms required for complete oxidation of pyruvic acid is? पाइरुविक एसिड के पूर्ण ऑक्सीकरण के लिए आवश्यक ऑक्सीजन परमाणुओं की संख्या है? 

a) 6 b) 12 c) 3 d) 0

 Answer ▽ 

A.

 6 Oxygen atom (three molecule)

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Question:   From NCERT  Derived PYQ 

RQ value is infinity means RQ मान का अनंत होना बताता है

 a) Fat is substrate b) Protein is substrate c) Floating respiration d) Anaerobic respiration

 Answer ▽ 

d

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Question:   From NCERT Derived PYQ 

There are various types of ATPase pump found in different types of cells of these, F-type, ATPase, also are found in all of the following except? इनमें से विभिन्न प्रकार के कोशिकाओं में पाए जाने वाले विभिन्न प्रकार के ATPase पंप हैं F-type ATPase निम्नलिखित को छोड़कर सभी में पाए जाते हैं?

 a) Inner membrane of mitochondria b) Thylakoid membrane of chloroplasts c) Plasma membrane of fungi d) All are correct

 Answer ▽ 

c

Plasma membrane of fungi not have ATPase while bacterial membrane has it.

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Question:   From NCERT   Derived PYQ 

Which of the following enzymes involved in Kreb's cycle is not present in the mitochondrial matrix? क्रेब चक्र में शामिल निम्नलिखित में से कौन सा एंजाइम माइटोकॉन्ड्रियल मैट्रिक्स में मौजूद नहीं है? 

a) Aconitase b) Malate dehydrogenase c) Fumarase d) Succinate dehydrogenase

 Answer ▽ 

 D.

Succinate dehydrogenase present on inner mitochondrial membrane

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Question:   From NCERT   Derived PYQ 

Marker enzyme of mitochondria is used in which of the following step? माइटोकॉन्ड्रिया के मार्कर एंजाइम का प्रयोग निम्नलिखित में से किस चरण में किया जाता है? 

a) Succinyl CoA → Succinic acid b) Succinate → Fumarate c) Fumarate → Malate d) Citrate → Isocitrate 

 Answer ▽ 

b

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Question:   From NCERT   Derived PYQ 

Pasteur effect is concerned with the shifting of environmental conditions from? पाश्चर प्रभाव पर्यावरणीय परिस्थितियों के इस परिवर्तन से संबंधित है? 

a) Light to dark b) Aerobic to anaerobic c) Anaerobic to aerobic d) Light to anaerobic

 Answer ▽ 

c

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Question:   From NCERT   Derived PYQ 

 Sequence of Cytochrome is? साइटोंक्रो टों म का अनुक्रम है? 

a) Cyt a, b, c, a3 

b) Cyt b, c, a, a3 

c) Cyt b, a, a3, c

 d) Cyt b, c, a3, a

 Answer ▽ 

b

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Question:   From NCERT   Derived PYQ 

Malonic acid is a competitive inhibitor of : मेलोनिक एसिड इसका एक प्रतिस्पर्धी अवरोधक है?

 a) Citric acid b) Succinic acid c) Malic acid d) Oxalosuccinic acid 

 Answer ▽ 

B. 

11th NCERT Page no. 158

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Question:   From NCERT   Derived PYQ 

What is true for decarboxylation in kreb's cycle? क्रेब चक्र में विकार्बोनीकरण के लिए क्या सच है? 

a) There are three successive steps of decarboxylation in kreb's cycle, leading to the formation of Oxaloacetic acid then α-ketoglutaric acid and then fumaric acid 

b) Takes place as two successive steps of decarboxylation, leading to the formation of αketoglutaric acid and then Acetyl-CoA 

c) There are two successive steps of decarboxylation in kreb's cycle, leading to the formation of α-ketoglutaric acid and then succinyl-CoA

d) There are three successive steps of decarboxylation in kreb's cycle, leading to the formation of Oxalosuccinic acid then α-ketoglutaric acid and then succinyl-CoA

 Answer ▽ 

C.

 11th NCERT page no. 231 - The TCA cycle starts with the condensation of acetyl group with oxaloacetic acid (OAA) and water to yield citric acid. The reaction is catalysed by the enzyme citrate synthase and a molecule of CoA is released. Citrate is then isomerised to isocitrate. It is followed by two successive steps of decarboxylation, leading to the formation of α-ketoglutaric acid and then succinyl-CoA. In the remaining steps of citric acid cycle, succinyl-CoA is oxidised to OAA allowing the cycle to continue. During the conversion of succinyl-CoA to succinic acid a molecule of GTP is synthesised. This is a substrate level phosphorylation. In a coupled reaction GTP is converted to GDP with the simultaneous synthesis of ATP from ADP. Also there are three points in the cycle where NAD+ is reduced to NADH + H+ and one point where FAD+ is reduced to FADH2. The continued oxidation of acetyl CoA via the TCA cycle requires the continued replenishment of oxaloacetic acid, the first member of the cycle. In addition it also requires regeneration of NAD+ and FAD+ from NADH and FADH2 respectively

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