How many types of nucleic acids are found in the living system?

(1)1

(2)2

(3)4

(4)3

The most interesting molecule in the living system is

(1) the most abundant genetic material

(2)the genetic material in most of the organisms

(3)the long polymer of deoxyribonucleotides

(4)all of the above

Which one is the characteristic of an organism?

(1)number of nucleotides

(2)sequence of nucleotides

(3)dimension of nucleotides

(4)all of the above

Which organism has more base pairs ?

1. E.coli

2. Bacteriophage

3. human

4. Yeast

How many types of nitrogenous bases are present in nucleic acid

(1) 4

(2) 3

(3) 5

(4) 6

Distance between two consecutive nucleotide pairs of DNA is

(1)0.34nm

(2)34angstrom

(3)3.4 micrometre

(4)34nm

In rRNA, thymine pairs with 

(1)adenine

(2)uracil

(3)both 1 and 2

(4)None of these

Which one of the following nucleotide sequences contains only 4 pyrimidine bases?

(1)UAGCGGUAA

(2)TGCCTAACG

(3)GATCAATGC

(4)GCUAGACAA

Regulation of gene expression in eukaryotes cannot take place at

(1)primary transcript level

(2)splicing level

(3)transport of m-RNA from nucleus to cytoplasm

(4)replication level

The conditions which regulate the expression of genes are

(1)Environmental

(2)Physiological

(3)Metabolic

(4)All of the above