The primary precursor for the production of cholesterol in our body is 
1. Acetic acid
2. Citric acid
3. Ethyl alcohol
4. Methanol

Subtopic:  METABOLIC BASIS FOR LIVING (OLD NCERT) |
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The pentose sugar present in RNA is
1. Galactose 
2. Sucrose
3. Ribose 
4. Fructose
 
Subtopic:  Nucleic Acid |
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A nucleoside is composed of
1. Sugar + Nitrogenous base
2. Sugar + Phosphate
3. Nitrogenous base + Phosphate
4. Purine + Pyrimidine
 
Subtopic:  The DNA |
 85%
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In B-DNA, one full turn of the helical strand contains
1. 11 base pairs
2. 8 base pairs
3. 10 base pairs
4. 9 base pairs
 
Subtopic:  The DNA |
 92%
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In B-DNA, the rise per base pair would be
1. 4.3 A 
2. 2.4 A
3. 3.4 A 
4. 4.2 A 
Subtopic:  The DNA |
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The nitrogenous bases of the two strands of DNA are joined by
1. Phosphodiester bond 
2. Hydrogen bond
3. Glycosidic bond
4. Peptide bond
Subtopic:  Nucleic Acid |
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The double helix model of DNA was proposed by
1. Berzelius 
2. Watson and Crick
3. Griffith
4. Robert Brown
 
Subtopic:  The DNA |
 95%
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The pitch of the B-DNA is 
1. 36 Å
2. 3.4 Å
3. 34 Å
4. 3.6 Å
Subtopic:  The DNA |
 75%
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In glycine, the R group is replaced by 
1. A methyl group 
2. Hydroxy methyl
3. A carboxylic group
4. A hydrogen atom
Subtopic:  Amino Acids |
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Zwitterions are ionized species of
1. Acidic amino acids
2. Basic amino acids
3. Neutral amino acids 
4. All of these
 
Subtopic:  Amino Acids |
 84%
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