When James Watson and Frencis Crick determine the structure of DNA?
a) 1953
b) 1962
c) 1972
d) 1975
A nucleotide is formed of which of the following units?
a) nitrogen base and phosphate
b) nitrogen base, sugar and phosphate
c) nitrogen base and sugar
d) sugar and phosphate
Double-helix structure of DNA is discovered by
a) Gobind Khurana
b) Nirenberg
c) Watson and Crick
d) Darwin
What is DNA replication?
a) Conservative
b) Non-conservative
c) Semi-conservative
d) none of these
Semi-conservative DNA replication was first demonstrated in…………
a) Drosophila melanogaster
b) Escherichia coli
c) Streptococcus pneumonae
d) Drosophila melanogaster
DNA unwinding is done by……………
a) Ligase
b) Helicase
c) Topoisomerase
d) Hexonuclease
