D(+) glucose yields an oxime with hydroxyl amine. The structure of the oxime would be:

1. 2.
3. 4.
Subtopic:  Carbohydrates - Classification & D-L configuration |
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In DNA, the linkages between different nitrogenous bases are:
1. Phosphate linkages
2. H-bonding
3. Glycosidic linkages
4. Peptide linkages
Subtopic:   DNA, RNA & Metal Ions |
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The figure shows a hypothetical tetrapeptide portion of a protein with parts labelled A-D. Which one of the following options is correct?
1. D is the acidic amino acid - glutamic acid
2. C is an aromatic amino acid - tryptophan
3. A is the C-terminal amino acid and D is N terminal amino acid
4. A is the sulphur containing amino acid-methionine
Subtopic:  α - Amino Acids, Peptide Bond, Proteins & Structure |
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 The disease caused by deficiency of vitamin B1 is:

1. Convulsions 2. Beri-beri
3. Cheilosis 4. Sterility
Subtopic:  Vitamins, Hormones & Enzymes |
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Sucrose can be formed by:
1. α–D–galactopyranose and α–D–glucopyranose
2. α–D–glucopyranose and β–D–fructofuranose
3. β–D–galactopyranose and α–D–fructofuranose
4. α–D–galactopyranose and β–D–fructopyranose

Subtopic:  Carbohydrates - Classification & D-L configuration |
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Which one of the following statements is not true regarding (+) lactose?

1. (+) lactose is a  β -glycoside and a molecule of D(+) galactose
2. (+) lactose is a reducing sugar and does not exhibit mutarotation
3. (+) lactose,  C 12 H 22 O 11  contains 8-0 H groups
4. On hydrolysis (+) lactose gives equal amount of D(+) glucose and D(+) galactose

Subtopic:  Carbohydrates - Classification & D-L configuration | Polysaccharides & their Importance |
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Which of the following is not a fat-soluble vitamin?

1. Vitamin A 

2. Vitamin B complex

3. Vitamin D 

4. Vitamin E

Subtopic:  Vitamins, Hormones & Enzymes |
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The correct statements regarding "Denaturation" are:

(a) Denaturation of proteins causes the loss of secondary and tertiary structures of the protein. 
(b) Denaturation leads to the conversion of a double strand of DNA into a single strand.
(c) Denaturation affects the primary structure which gets distorted.


1. (a), (b) and (c)
2. (b) and (c)
3. (a) and (c)
4. (a) and (b)

Subtopic:  Denaturation of Proteins & Chemical Properties |
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Which one of the following does not exhibit the phenomenon of mutarotation?

1. (+) Sucrose

2. (+) Lactose

3. (+) Maltose=

4. (-) Fructose

Subtopic:  Carbohydrates - Classification & D-L configuration |
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Fructose reduces Tollen's reagent due to:

1. Primary alcoholic group
2. Secondary alcoholic group
3. Enolisation of fructose followed by conversion to aldehyde by base
4. Asymmetric carbon
Subtopic:  Carbohydrates - Classification & D-L configuration |
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