AP BIOLOGY

Detailed explanation-1: -G2 phase, Gap 2 phase, or Growth 2 phase, is the third subphase of interphase in the cell cycle directly preceding mitosis. It follows the successful completion of S phase, during which the cell’s DNA is replicated.

Detailed explanation-2: -This is one of two ‘gap’ phases in the standard eukaryotic mitotic cell cycle. It is the interval between the completion of DNA synthesis and the beginning of mitosis. Protein synthesis occurs in this phase, following DNA replication in the S phase.

Detailed explanation-3: -Phospholipids are synthesized in the G2/M phase of the cell cycle.

Detailed explanation-4: -The organelles necessary for the cell division (in M phase) are also synthesized in the S phase. The microtubules that will be used to mobilize the chromosomes in M phase are assembled at G2.

Detailed explanation-5: -During the G1 phase, the cell is metabolically active and requires many organelles for protein synthesis, while acquiring the potential for the DNA doubling process. The duration of the entire cycle depends on the time of the G1 phase, which varies according to different conditions and tissue types.