Question

What three phases make up the interphase?

Answer 1

As the name suggests, interphase is the phase that prepares cells for further division. It has three sub parts in which synthesis of required proteins, replication of DNA and increase in the number of proteins and RNA takes place.

Complete answer:
Mitosis is the process that most cells use to divide into two. Cells remain in a resting state called interphase in the period between their mitotic phases. There are three separate phases that happen in interphase, the ${G}_{1}$ phase, S phase, and the ${G}_{2}$ phase:
${G}_{1}$ Phase: The ${G}_{1}$ phase is the first growth phase that happens in the interphase. It takes place directly after the division of the cell is complete. During this time the cell starts to grow and the amount of proteins and RNA content increases. After this phase, the S phase begins.
S Phase: The S phase includes the synthesis of DNA material. The synthesis of DNA material happens by the process of DNA replication. This is the longest phase of the entire interphase. The reason why this is so long is because DNA replication is an extremely complicated process.
${G}_{2}$ Phase: After the S phase is complete, the second growth phase or the ${G}_{2}$ phase begins. The amount of proteins and RNA starts to increase. This is done so that the cell has enough material to divide. The number of organelles present inside the cell is also increased during this time. At the end of this phase, the division of the cell finally begins.

Note:
The interphase is the resting period of the cell that happens after it divides. During this time the cell grows (${G}_{1}$ phase) and generates more materials via the synthesis of DNA(S phase). After DNA synthesis is complete cell growth occurs (${G}_{2}$ phase) and the cell prepares for mitosis.