Question

Which of the following options accurately explains the cell division (mitotic phase and interphase in the cell cycle) and the cell cycle molecular control system?

A) The mitotic phase involves DNA replication, while interphase consists of cell division.
B) Interphase is the phase where cells divide, and the molecular control system regulates energy production.
C) The cell division process occurs in interphase, and the molecular control system ensures proper nutrient intake.
D) The cell cycle consists of interphase (G1, S, G2) and the mitotic phase (prophase, metaphase, anaphase, telophase), and the molecular control system regulates the progression of the cell cycle.

Answer 1

Option D accurately explains cell division and the cell cycle, highlighting that the cell cycle includes interphase for preparation and growth, followed by the mitotic phase for division, all regulated by a molecular control system.

Step-by-step explanation:

The correct explanation of the cell division and the cell cycle molecular control system is option D: The cell cycle consists of interphase (G1, S, G2) and the mitotic phase (prophase, metaphase, anaphase, telophase), and the molecular control system regulates the progression of the cell cycle.

Interphase is a period of growth and preparation for cell division and consists of three phases:

• G1 Phase (First Gap): The cell grows and accumulates building blocks of DNA and proteins.
• S Phase (Synthesis of DNA): The cell replicates its DNA, ensuring each new cell will have an identical set of genetic material.
• G2 Phase (Second Gap): The cell prepares for mitosis by synthesizing proteins necessary for cell division.

The mitotic phase follows interphase and includes mitosis (nuclear division) and cytokinesis (cytoplasm division), resulting in two genetically identical daughter cells. The cell cycle is controlled by a series of checkpoints that ensure proper timing and execution of these phases.