The main component of cellular membrane is ………
a) lipid
b) carbohydrates
c) cellulose
d) protein
The kind of amino acids which are involved in the synthesis of most proteins are:
a) 20
b) 30
c) 40
d) 60
Amino acids mainly differ from each other by the difference in their …….
a) R – group
b) amino group
c) carboxyl group
d) alpha group
Keratin is type of protein found in…….
a) silk fiber
b) nails
c) blood cells
d) muscle cells
DNA is more or less present in all of the following except……..
a) nucleus
b) chromosomes
c) cytosol
d) mitochondria
To which of the following does thymine from hydrogen bonds in DNA?
a) adenine
b) thymine
c) cyosine
d) guanine
