Proteins:
Proteins contain which of the following elements?
a) C, H, O
b) C, H, Ca, O
c) C, H, O, N
d) C, H, O, S
Explanation: some proteins contain sulphur
A large number of amino acids are known; of these, only…….differnt types of amino acids combine in different number and sequence.
a) ten
b) twenty
c) thirty
d) forty
Amino acids are carboxylic acid having ……..group.
a) carbonyl group
b) hydroxyl group
c) amino group
d) benzyl group
Explanation: amino group = NH2
High molecular mass compound was hydrolyzed. The product was analyzed and found to be amino acid. The compound is…………
a) carbohydrate
b) lipid
c) protein
d) DNA
Each amino acid has a central carbon atom called alpha carbon. How many different groups are attached to alpha carbon of an amino acid?
a) three
b) five
c) six
d) four
Explanation: these are amino group, carboxyl group, hydrogen and alkyl group
