PATHOLOGY MCQ
CELL DAMAGE
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
The cell replicates its DNA. At the end of this phase, the cell has two complete sets of DNA.
|
|
G1
|
|
|
S
|
|
|
G2
|
|
|
M
|
Explanation:
Detailed explanation-1: -M phase (mitosis) is usually followed by cytokinesis. S phase is the period during which DNA replication occurs.
Detailed explanation-2: -During S phase, DNA synthesis or replication takes place. In this time the amount of DNA per cell doubles. However, there is no increase in the chromosome number and the chromosome number remains same. Hence, the amount of DNA and number of chromosomes after S phase will be 4C and 2n respectively.
Detailed explanation-3: -The most important event occurring in S phase is the replication of DNA. The aim of this process is to produce double the amount of DNA, providing the basis for the chromosome sets of the daughter cells.
There is 1 question to complete.