Question

$G_1,S$ and $G_2$ are stages of _________.

• A. Interphase
• B. Prophase
• C. Metaphase
• D. Anaphase

Answer 1

The correct option is A Interphase

In eukaryotic cells or cells with a nucleus, the stages of the cell cycle are divided into two major phases: interphase and the mitotic (M) phase. During interphase, the cell grows and generates a copy of its DNA. Under the interphase stage 3 stages are found:

1. $G_1$ phase: During the $G_1$ phase, also called the first gap phase, the cell grows physically larger, copies organelles, and makes the molecular building blocks it will need in later steps.

2. $S$ phase: In the $S$ phase, the cell synthesizes a complete duplicate copy of the DNA in its nucleus. It also duplicates a microtubule-organizing structure called the centrosome which helps to separate DNA during the M phase.

3. $G_2$ phase: During the $G_2$ phase, the cell grows more, makes proteins and organelles, and begins to reorganize its contents in preparation for mitosis. $G_2$ phase ends when mitosis begins.

After these stages during the mitotic (M) phase, the cell separates its DNA into two sets and divides its cytoplasm, forming two new cells.
So, the correct option is A.