NEET BIOLOGY

CELL STRUCTURES AND FUNCTION

CELL CYCLE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Most of the life cycle of a cell is spent in in what phase of the cell cycle?
A
Mitosis
B
Interphase
C
Cytokinesis
D
Sythesis
Explanation: 

Detailed explanation-1: -A cell spends most of its time in what is called interphase, and during this time it grows, replicates its chromosomes, and prepares for cell division. The cell then leaves interphase, undergoes mitosis, and completes its division.

Detailed explanation-2: -During this phase, cells produce proteins and expand to roughly double their original size. To summarise, during this phase, the cell grows, develops, prepares for cell division, replicates its chromosomes, and so on, and a cell spends the majority of its time in this stage.

Detailed explanation-3: -There are three stages of interphase: G1 (first gap), S (synthesis of new DNA ), and G2 (second gap). Cells spend most of their lives in interphase, specifically in the S phase where genetic material must be copied. The cell grows and carries out biochemical functions, such as protein synthesis, in the G1 phase.

Detailed explanation-4: -Most of its life is spent in Interphase, where the cell grows and a copy of the chromosomes are synthesized. In mitosis, the nucleus (and the chromosomes) divide. Once the nucleus divides, the cell continues to grow and divides in a process known as cytokinesis.

Detailed explanation-5: -In sum, then, interphase generally takes between 18 and 20 hours. Mitosis, during which the cell makes preparations for and completes cell division only takes about 2 hours.

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