NEET BIOLOGY

CELL STRUCTURES AND FUNCTION

CELL CYCLE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Distinct chromosomes begin to spread out into a tangle of chromatin. Nuclear envelope reforms. Spindle fibers break apart. Nucleolus becomes visible in each daughter cell.
A
Prophase
B
Metaphase
C
Anaphase
D
Telophase
Explanation: 

Detailed explanation-1: -Telophase-During this phase, chromosomes disappear (become chromatin), nuclear membrane reforms, nucleoli reappears, spindle disappears and centrioles duplicate. Hence, the correct answer is option D.

Detailed explanation-2: -During the last phase of mitosis, telophase, the two sets of chromosomes reach the opposite poles of the cell. This is followed by the reformation of the nuclear envelope, uncoiling of the DNA, and disappearance of the spindle fibers.

Detailed explanation-3: -Telophase begins when the decondensing daughter chromatids arrive at the poles, the kinetochore microtubules disappear, and the nuclear envelope reforms around the decondensing chromosomes to form the two daughter nuclei (Benavente, 1991).

Detailed explanation-4: -During anaphase, the chromosomes separate and move along spindle fibers to opposite ends of the cell. During telophase, the chromosomes, which were distinct and condensed, begin to spread out into tangle of chromatin.

Detailed explanation-5: -Telophase: spindle fibers break down, nuclear membrane forms, and chromosomes begin to uncoil and form chromatin.

There is 1 question to complete.