Carbon atoms of pentose sugars of nucleotides having phosphodiester linkage are -
1. 5' and 3'
2. 2' and 5'
3. 5' and 5'
4. '3 and 3'

Subtopic:   DNA, RNA & Metal Ions |
 90%
From NCERT
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Nucleic acids are the polymers of : 
1. Nucleosides
2. Nucleotides
3. Bases
4. Sugars

Subtopic:   DNA, RNA & Metal Ions |
 89%
From NCERT
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The incorrect statement among the following regarding glucose is -

1. It is an aldohexose.
2. n-Hexane is formed when glucose is heating with HI.
3. It is present in furanose form.
4. It does not give 2, 4- DNP test.
Subtopic:  Carbohydrates - Classification & D-L configuration |
 79%
From NCERT
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Each polypeptide in a protein has amino acids linked with each other in a specific sequence. This sequence of amino acids is said to be .....

1. Primary structure of proteins

2. Secondary structure of proteins

3. Tertiary structure of proteins

4. Quaternary structure of proteins

Subtopic:  α - Amino Acids, Peptide Bond, Proteins & Structure |
 85%
From NCERT
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 RNA does not contain -
1. Adenine
2. Uracil
3. Thymine
4. Cytosine

Subtopic:   DNA, RNA & Metal Ions |
 91%
From NCERT
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Which of the following B group vitamins can be stored in our body?

1. Vitamin B1

2. Vitamin B2

3. Vitamin B6

4. Vitamin B12

Subtopic:  Vitamins, Hormones & Enzymes |
 90%
From NCERT
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DNA does not have -
1. Adenine
2. Thymine
3. Cytosine
4. Uracil

Subtopic:   DNA, RNA & Metal Ions |
 96%
From NCERT
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There cyclic structures of monosaccharides are given below which of these are anomers.

(1) I and II     (2) II and III
(3) I and III    (4) III is anomer of I and II

Subtopic:  Polysaccharides & their Importance |
 85%
From NCERT
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Which one of the following reactions of glucose can be explained only by its cyclic structure?

1. Glucose forms pentaacetate.
2. Glucose reacts with hydroxylamine to form an oxime.
3. Pentaacetate of glucose does not react with hydroxylamine.
4. Glucose is oxidized by nitric acid to saccharic acid.

Subtopic:  Carbohydrates - Classification & D-L configuration |
 67%
From NCERT
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 D configuration is shown by -

           (i)                 (ii)             (iii)


1. i, ii and iii
2. ii and iii
3. i and ii
4. only iii

Subtopic:  Carbohydrates - Classification & D-L configuration |
 71%
From NCERT
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