NEET BIOLOGY

CELL STRUCTURES AND FUNCTION

CELL CYCLE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Why is the metaphase important?
A
The DNA gets copied and the cell grows and develops
B
The DNA lines up so exact copies can be pulled to each side
C
The nuclear membrane disappears and the spindle fibers appear
D
Two identical daughter cells are formed
Explanation: 

Detailed explanation-1: -The correct alignment of chromosomes at the metaphase plate is crucial for the propagation of proper cell division. Upon arrangement, the two kinetochores on each chromosome, (one for each sister chromatid) with spindle fibers attached to them, are vital to progress into the next step of mitosis, which is anaphase.

Detailed explanation-2: -Cells must replicate their DNA before they can divide. This ensures that each daughter cell gets a copy of the genome, and therefore, successful inheritance of genetic traits.

Detailed explanation-3: -When one cell divides into two, both must have a copy of the genetic information. Therefore, before cell division occurs, the genes must also make duplicates of themselves so that all of the important genetic information ends up in each of the new cells.

Detailed explanation-4: -Metaphase Normally, individual chromosomes are spread out in the cell nucleus. During metaphase, the nucleus dissolves and the cell’s chromosomes condense and move together, aligning in the center of the dividing cell. At this stage, the chromosomes are distinguishable when viewed through a microscope.

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