During which phase(s) of the cell cycle does the amount

STUDY MATERIALS
COURSES
MORE
SUCCESS STORY
ADMISSION
STORE

Back

JEE ADVANCE

CLASS XI - XII
CRASH COURSE

CLASS XI - XII

CRASH COURSE

JEE MAIN

CLASS XI - XII
CRASH COURSE

CLASS XI - XII

CRASH COURSE

NEET

CLASS XI - XII
CRASH COURSE

CLASS XI - XII

CRASH COURSE

BITSAT

CLASS XI - XII

CLASS XI - XII

CBSE BOARD

CLASS IX

CLASS X

CLASS XI

CLASS XII

CLASS VI

CLASS VII

CLASS VIII

UP BOARD

CLASS IX
CLASS X
CLASS XI
CLASS XII

CLASS IX

CLASS X

CLASS XI

CLASS XII

CUET

CRASH COURSE

CRASH COURSE

Courses

CLASSROOM COURSES
ONLINE COURSES

ONLINE COURSES

More

Solution

Q.
During which phase(s) of the cell cycle does the amount of DNA in a cell remain at 4C level if the initial amount is denoted as 2C [2014]

1 $G_{0} a n d G_{1}$

2 $G_{1} a n d S$

3 Only $G_{2}$

4 $G_{2}$ and M

Ans.
(3)

A cell cycle is divided into $G_{1}$ , S, $G_{2}$ , and M phases. $G_{1}$ or first growth phase is followed by S phase or synthetic phase. DNA replication occurs in S phase and DNA amount doubles up i.e., a cell with 2C DNA in $G_{1}$ phase will now have 4C DNA. $G_{2}$ phase is second growth phase where DNA content remains 4C. M phase is the phase of division where DNA content either regains 2C level (mitosis) or becomes halved i.e., 1C (in meiosis). $G_{0}$ phase is the phase of differentiation where cell contains DNA as in the same amount as its parent cell and does not divide further.

Want Us to Email you About Special Offers & Updates?