NEET BIOLOGY

CELL STRUCTURES AND FUNCTION

CELL CYCLE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which event occurs during interphase
A
centrioles appear
B
the cells grow
C
spindle fibers begin to form
D
centromeres divide
Explanation: 

Detailed explanation-1: -The phases of interphase are the G1 phase (cell growth), S phase (DNA synthesis), and G2 phase (cell growth). The G1 phase, also known as the first gap phase, is a stage when the cell physically expands, duplicates organelles, and produces the molecular building blocks required for subsequent processes.

Detailed explanation-2: -Interphase is defined by three stages: the first gap phase (G1), the synthesis (S) phase, and the second gap (G2) phase.

Detailed explanation-3: -During interphase, the chromosomes are decondensed and distributed throughout the nucleus, so the nucleus appears morphologically uniform. At the molecular level, however, interphase is the time during which both cell growth and DNA replication occur in an orderly manner in preparation for cell division.

Detailed explanation-4: -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-5: -During interphase, the cell grows and the nuclear DNA is duplicated. Interphase is followed by the mitotic phase. During the mitotic phase, the duplicated chromosomes are segregated and distributed into daughter nuclei.

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