Class 11 | Biology | Chapter 13 | Photosynthesis in higher plants

Which one of the following is incorrect about the activities associated with PS-I and PS-II in non-cyclic photophospho-rylation? (a) Water is oxidised in PS - II, but not in PS - I. (b) Photons (light) are needed to activate both PS - I and PS - II. (c) Photolysis of water, formation of ATP + NADPH + H occur. (d) Production of NADPH + H+ is associated with PS - II, but not with PS - I.

Ruhul Amin Alig

Class 11 | Biology | Chapter 13 | Photosynthesis in higher plants

Which of the following statement is incorrect ? (a) C3 plants respond to higher temperature, show higher photosynthetic rate while C4 plants have lower optimum temperature. (b) Tropical plants have higher temperature optimum than the plants adapted to temperate climate. (c) Light reaction is less temperature sensitive than dark reaction. (d) The effect of water as a factor is more through its effect on plant, rather than directly on photosynthesis.

Ruhul Amin Alig

Class 11 | Biology | Chapter 13 | Photosynthesis in higher plants

The C4 plants are photosynthetically more efficient than C3 plants because: (a) the CO2 compensation point is more (b) CO2 generated during photorespiration is trapped and recycled through PEP carboxylase (c) the CO2 efflux is not prevented (d) they have more chloroplasts

Ruhul Amin Alig

Class 11 | Biology | Chapter 13 | Photosynthesis in higher plants

Which of the following bacteria is/are photosynthetic autotrophs? (a) Purple sulphur bacteria (b) Green sulphur bacteria (c) Cyanobacteria (d) All of the above

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Class 11 | Biology | Chapter 13 | Photosynthesis in higher plants

Chemiosmotic hypothesis given by Peter Mitchell proposes the mechanism of (a) synthesis of ATP (b) synthesis of FADH2 (c) synthesis of NADH (d) synthesis of NADPH

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Class 11 | Biology | chapter 6 | Anatomy Of Flowering Plants

In which type of cells, C4 acids in maize are broken down to release CO2 and 3-carbon molecule? 1. In bundle sheath cells of C3 plant 2. In mesophyll cells of C4 plants 3. In bundle sheath cells of C4 plants 4. In mesophyll cells of C3 plant

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Class 12 | Biology | chapter 15 | BIODIVERSITY AND CONSERVATION

Productivity

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Class 11 | Biology | chapter 14 | Respiration in Plants

Assertion : Each molecule of ribulose-1, 5-bisphosphate fixesonemolecule of CO2. Reason : Three molecules of NADPH and two ATP are required for fixation of one molecule of CO2. (a) If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion. (b) If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion. (c) If Assertion is true but Reason is false. (d) If both Assertion and Reason are false.

Ruhul Amin Alig

Class 11 | Biology | chapter 14 | Respiration in Plants

The diagram below shows ATP synthesis through chemiosmosis. Which option shows the correct labelling of A, B, C and D in the diagram ?

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Class 11 | Biology | Chapter 13 | Photosynthesis in higher plants

What is common between Chloroplasts, Chromoplasts and Leucoplasts? (a) Presence of pigments (b) Possession of thylakoids and grana (c) Storage of starch, proteins and lipids (d) Ability to multiply by a fission-like process

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Class 11 | Biology | chapter 14 | Respiration in Plants

Increase in CO2 concentration around leaf results in (a) Rapid opening of stomata (b) Partial closure of stomata (c) Complete closure of stomata (d) No effect on stomatal opening

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Class 11 | Biology | Chapter 17 | Breathing and Exchange of Gases

Which of the following statement is not true for the EMP pathway? (1) Phosphofructokinase enzyme is also known as pacemaker enzyme (2) Net 4 ATP gained (3) Two pyruvic acid molecules are formed (4) Hexokinase enzyme is the first enzyme of pathway

Ruhul Amin Alig

Class 11 | Biology | Chapter 13 | Photosynthesis in higher plants

Class 11 | Biology | chapter 13 | Photosynthesis in higher plants | MCQs*

Ruhul Amin Alig