Biomolecules

Which of the following hormones is produced under the condition of stress which stimulate glycogenolysis in the liver of human beings?

1. Thyroxine
2. Insulin
3. Adrenaline
4. Estradiol

D(+)-glucose reacts with hydroxylamine and yields an oxime. The structure of the oxime would be

1. [figure]
2. [figure]
3. [figure]
4. [figure]

In DNA, the linkages between different nitrogenous bases are

1. phosphate linkage
2. H-bonding
3. glycosidic linkage
4. peptide linkage

Deficiency of vitamin B1 causes the disease

1. convulsions
2. beri-beri
3. cheilosis
4. sterility

Which one of the following sets of monosaccharides forms sucrose?

1. -D-galactopyranose and -D-glucopyranose
2. -D-glucopyranose and -D-fructofuranose
3. -D-glucopyranose and -D-fructofuranose
4. -D-glucopyranose and -D-fructopyranose

Which of the following is not a fat soluble vitamin?

1. Vitamin B complex
2. Vitamin D
3. Vitamin E
4. Vitamin A

Which of the statements about "Denaturation" given below are correct?

1. B and C
2. A and C
3. A and B
4. A, B and C

Which one of the following statements is not true regarding (+) lactose?

1. On hydrolysis (+) lactose gives equal amount of D(+) glucose and D(+) galactose.
2. (+) Lactose is a -glucoside formed by the union of a molecule of D(+) glucose and a molecule of D(+) galactose.
3. (+) Lactose is a reducing sugar and does not exhibit mutarotation.
4. (+) Lactose, C12H22O11 contains 8 –OH groups

Fructose reduces Tollens' reagent due to

1. asymmetric carbons
2. primary alcoholic group
3. secondary alcoholic group
4. enolisation of fructose followed by conversion to aldehyde by base

Which one of the following does not exhibit the phenomenon of mutarotation?

1. (+) Sucrose
2. (+) Lactose
3. (+) Maltose
4. (−) Fructose