Choose the correct statements about deoxyribonucleic acid.
a)It is a double helical structure.
b)It consists of adenine, guanine, uracil and thymine bases.
c)It is protected inside two nuclear membranes.
1
(a) and (c) only
2
(a) only
3
(a) and (b) only
4
(a) and (b)