When a monosaccharide forms a cyclic hemiacetal, the carbon atom that contained the carbonyl group is identified as the ....... carbon atom, because

• D, the carbonyl group is drawn to the right

• L, the carbonyl group is drawn to the left

• acetal, it forms bond to an -OR and an -OR'

• anomeric, its substitutents can assume an α or β position

Which of the following is/are α-amino acid?

• 

• 

• Both (a) and (b)

• None of these

Which of the following is not a fat soluble vitamin?

• Vitamin-B complex

• Vitamin-D

• Vitamin-E

• Vitamin-A

Which of the statements about 'Denaturation' given below are correct?
Statements

(i) Denaturation of proteins causes loss of secondary and tertiary structures of the protein.
(ii) Denaturation leads to the conversion of double strand of DNA into single strand.
(iii) Denaturation affects primary structure which gets destroyed.

• (ii) and (iii)

• (i) and (iii)

• (i) and (ii)

• (i), (ii) and (iii)

The secondary structure of a protein refers to

• alpha helical backbone

• hydrophobic interactions

• sequence of alpha amino acid

• fixed configuration of the polypeptide backbon

A codon has a sequence of A, and specifies a particular B that is to be incorporated into a C. What are A, B, C

• A	B	C
  3 bases	amino acid	carbohydrate

• A	B	C
  3 acids	carbohydrate	protein

• A	B	C
  3 base	protein	amino acid

• A	B	C
  3 bases	mino acid	protein

Milk changes after digestion into

• cellulose

• fructose

• glucose

• lactose

Which of the following set consists only of essential amino adds?

• Alanine, tyrosine, cystine

• Leucine, lysine, tryptophane

• Alanine, glutamine, lycine

• leucine, praline, glycine

Which of the following is a ketohexose?

• Glucose

• Sucrose

• Sucrose

• Ribose

Sucrose on hydrolysis gives

• glucose and maltose

• glucose and lactose

• glucose and fructose

• only glucose