Question: From NCERT NEET Derived PYQ
In the given diagram of chloroplast enzymes required for the synthesis of carbohydrates and proteins are located in:
1. A
2. B
3. C
4. D
Answer ▽
4. D
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Question: From NCERT NEET Derived PYQ AIIMS - 2013
Chromatin is made up of:
(1) DNA and protein
(2) DNA and histone
(3) DNA, RNA, protein
(4) RNA, histone and oil bodies.
Answer ▽
(3) DNA, RNA, protein
The chromatin is created of DNA, RNA, and proteins. The composition of DNA in chromatin is
, of RNA is
and of proteins is 50 to
. These components are found in different organisms or withinside the different tissues of the identical species. DNA wraps around a simple histone protein; this structure is understood as a nucleosome. They appear to like being beads on string-like structures. Therefore, the preferred content material of chromatin is histone proteins. Histones are tiny, positive charged proteins. Now the non- histone protein is also present in the chromatin body, the proteins that remain when the histones are classified as non-histone proteins. Hence, we tend to conclude chromatin alone cannot be shaped simply macromolecule, as a result of DNA desires a protein structure to wrap around.
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Question: From NCERT NEET Derived PYQ
How many of the following cell organelles are not present in prokaryotic cell?
Endoplasmic reticulum, Nucleus, lysosomes, vacuoles, ribosomes, centrioles
(1)6
(2)5
(3)4
(4)2
Answer ▽
(2)5
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Question: From NCERT NEET Derived PYQ
In which of the following cell organelles ribosomes are present?
(1)cytoplasm
(2)Mitochondria and chloroplast
(3)Nucleus, Mitochondria and chloroplast
(4) cytoplasm, Mitochondria and chloroplast
Answer ▽
4
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Question: From NCERT NEET Derived PYQ
Answer ▽
Ribosomes are the granular structures composed of RNA and proteins. The eukaryotic ribosomes are 80S while the prokaryotic ribosomes are 70S . The cytoplasmic ribosomes are 80S whereas the ribosomes of chloroplast are smaller i.e.; 70S. Mitochondria is a prokaryotic one containing 70S ribosomes. The 'S' is a Svedberg unit stands for the sedimentation coefficient . It indirectly measures the density and size.So, the correct option is 'Option B'
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Question: From NCERT NEET Derived PYQ
Answer ▽
Correct option is C)
Plasmids are small, circular, extrachromosomal DNA which are able to self replicate. They are seen in certain bacteria. They usually contain some unique phenotypic characters to some bacteria like resistance to antibiotics. They are widely used in genetic engineering for transfer of desired gene. The transformants are identified due to presence of antibiotic resistance genes.
Thus, the correct answer is 'They help in the replication of nucleoid.'
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Question: From NCERT NEET Derived PYQ
Which of the following is not true about plasmid
(1) extra chromosomal DNA
(2)give unique genotypic characters to bacteria
(3)helps in antibiotic resistance
(4)helps in reproduction
Answer ▽
4
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Question: From NCERT NEET Derived PYQ
Lateral movement of which of the following biomolecules takes place within the overall bilayer
(1)lipids
(2)carbohydrates
(3)proteins
(4)Both A and C
Answer ▽
(4)Both A and C
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Question: From NCERT NEET Derived PYQ
How many of the following structures are present in Bacteria?
(Flagella, cilia, pili, fimbriae)
(1)4
(2)3
(3)2
(4)1
Answer ▽
(2)3
Pili, Fimbriae and flagella are structures that are found on the cell wall of the bacteria. These are structures that are made out of cellular components like proteins, for example, Pilli is made up of the protein pilin and flagella is made up of the protein flagellin.Flagella are longer than both pili and fimbriae. These are a surface structure of the bacteria.Cilia are microtubule-based hair-like organelles that extend from the surface of almost all cell types of the human body. ... Sensory cilia act as cellular antennae to sense environmental and morphogenic cues, for example, during development.
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Question: From NCERT NEET Derived PYQ
Carotene and xanthophylls are present in
(1)Chloroplast
(2)chromoplast
(3)leucoplast
(4) Both A and B
Answer ▽
(4) Both A and B
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