Question

Most replication of DNA takes place at

• A. I
• B. II and III
• C. IV only
• D. IV and V
• E. VI

Answer 1

The correct option is A I

$G_1$ phase of cell cycle includes doubling of all cellular components except chromosomes while $G_2$ phase follows S phase and prepares the cell for division. S phase of cell cycle includes DNA replication. A prophase cell has duplicated DNA content accommodated in two sister chromatids of each chromosome. Metaphase is the stage of alignment of chromosomes on an equatorial plate while completion of the separation of sister chromatids which are now present at the opposite poles of cell marks telophase. So, the correct answer is option A.