Which one of the following compounds will form an osazone derivative ?

1. CH3CH2COCH2OH

2. CH3COCH2CH2OH

3. CH3CH2CHOHCH2OH

4. CH3CH2COCH2OCH3

Subtopic:  Carbohydrates - Classification & D-L configuration |
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The configuration of the chirality centers in D-threose (shown) are:

(1) 2R, 3R

(2) 2R, 3S

(3) 2S, 3R

(4) 2S, 3S 

Subtopic:  α - Amino Acids, Peptide Bond, Proteins & Structure |
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Which of the following Fischer projection formula is same as D-Glyceraldehyde ?

(1) 

(2) 

(3) 

(4) 

Subtopic:  Carbohydrates - Classification & D-L configuration |
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Which reagent/s can be used to distinguish glucose and fructose?

(I) Bromine water (II) furfural test (III) Schiff’s reagent

1. (I), (II) and (III)

2. (II) and (III)

3. (I)  & (II)

4. Only (Ill)

Subtopic:  Carbohydrates - Classification & D-L configuration | Polysaccharides & their Importance |
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Proteins mainly contain:

(1) C, H, O and N

(2) only C and H

(3) C, H and O

(4) N and H

Subtopic:  α - Amino Acids, Peptide Bond, Proteins & Structure |
 88%
From NCERT
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In the human body, enzymes hydrolyse protein into:

1. a ketonic acid-like CH3COCOOH

2. a hydroxy acid like CH3CHOHCOOH

3. dicarboxylic acid-like HOOC—COOH

4. amino acid-like CH2NH2COOH

Subtopic:  Vitamins, Hormones & Enzymes |
 81%
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Which statement about protein is wrong?

(1) Proteins occur in all living cells

(2) Proteins invariably contain N, O, C and H

(3) Proteins are synthesized by plant kingdom only

(4) Proteins are also synthesized in laboratory

Subtopic:  α - Amino Acids, Peptide Bond, Proteins & Structure |
 84%
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The main structural feature(s) of protein is/are:

1. The ester linkage

2. The ether linkage

3. The peptide linkage

4. All of these

Subtopic:  α - Amino Acids, Peptide Bond, Proteins & Structure |
 87%
From NCERT
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Proteins give ?

(1) a violet colour with alkaline CuSO4 solution

(2) form a purple colour on boiling with dilute ninhydrin solution

(3) yellow colour on boiling with HNO3

(4) all of the above

Subtopic:  α - Amino Acids, Peptide Bond, Proteins & Structure |
 80%
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Which of the following is proteolytic enzyme?

(1) Insulin

(2) Diastase

(3) Pepsin

(4) Adenine

Subtopic:  Vitamins, Hormones & Enzymes |
 76%
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