Which of the following is not a Pyrimidine?
Thymine
Uracil
Guanine
Cytosine
C.
Guanine
The nitrogenous bases are of two types:
(a) Pyrimidine base- cytosine, thymine
(b) Purine base- adenine, guanine
These nitrogenous bases are found in DNA/ RNA. Uracil is found in RNA in place of thymine.
Balbiani rings are the structural features of
allosomes
polytene chromosomes
autosomes
lampbrush chromosomes
A eukaryotic gene contains two kinds of base sequences. Which of these plays an important role in protein synthesis?
Introns
Exons
Both (a) and (b)
None of these