PATHOLOGY MCQ
CELL DAMAGE
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
In the S stage of interphase ____
|
|
the cell grows
|
|
|
the nucleus divides
|
|
|
the cell membrane divides
|
|
|
the DNA is replicated
|
Explanation:
Detailed explanation-1: -During S phase, replication increases the DNA content of the cell from 2n to 4n, so cells in S have DNA contents ranging from 2n to 4n. DNA content then remains at 4n for cells in G2 and M, decreasing to 2n after cytokinesis.
Detailed explanation-2: -S phase. In S phase, the cell synthesizes a complete copy of the DNA in its nucleus. It also duplicates a microtubule-organizing structure called the centrosome. The centrosomes help separate DNA during M phase.
Detailed explanation-3: -DNA replication during S phase generates two identical copies of each chromosome. Each chromosome is destined for a daughter cell, but each daughter must receive one and only one copy of each chromosome.
There is 1 question to complete.