Biology Quiz on DNA

Draw the structure of Nucleotide

DNA replication occurs during ..................... of cell cycle

• Prophase

• G1 Phase

• S phase

• G2 Phase

In prokaryotes DNA is in form of

• Single open ended DNA

• Single join ended DNA

• Chromosomes

• Chromatins

The functions of DNA Polymerase are

• Proofreading

• Help in joining separated segments of DNA

• Separate DNA double helix

• Building RNA from DNA

A special enzyme that adds short, repeated DNA sequences to chromosome tips

• DNA Polymerase

• Helicase

• Telomerase

• Ligase

If the sequence of DNA strand is

5' A-G-G-C-T-A-T-A-G-A-A-C-A 3'

So, the complementary strand is

Gene (X) composed of 84 Pairs of nitrogenous bases, from the following table which shows the number of some nitrogenous bases, what is the number of Cytosine bases in this gene?

• 18

• 36

• 25

• 43