Question

Among these statement about the cell cycle
• [A.] G is growth phase
• [B.] DNA replication in S phase
• [C.] Mitosis included cytokinesis
• [D.] \(G_0\) is dividing phase Choose the correct answer from the options given below:

• A. A & B Only
• B. A, B, C & D Only
• C. A, B & C Only
• D. B & C Only

Hint:

S phase: \[ \text{DNA replication occurs} \] \(G_0\) phase: \[ \text{Non-dividing resting stage} \]

Answer 1

The Correct Option is C

Concept: Cell cycle is the sequence of events through which a cell grows and divides. Major phases:
• Interphase
• \(G_1\) phase
• S phase
• \(G_2\) phase
• M phase

Step 1: Analyze statement A. The “G” in: \[ G_1 \quad \text{and} \quad G_2 \] stands for: \[ \boxed{ \text{Gap or Growth phase} } \] During this phase:
• Cell grows
• Organelles increase
• Proteins are synthesized Hence statement A is correct.

Step 2: Analyze statement B. S phase means: \[ \boxed{ \text{Synthesis phase} } \] During this phase:
• DNA replication occurs. Chromosome number remains same but DNA content doubles. Thus statement B is correct.

Step 3: Analyze statement C. M phase includes:
• Karyokinesis (nuclear division)
• Cytokinesis (cytoplasmic division) Therefore mitotic phase ultimately includes cytokinesis. Hence statement C is correct.

Step 4: Analyze statement D carefully. \(G_0\) phase is: \[ \boxed{ \text{Resting or quiescent phase} } \] Cells in \(G_0\):
• Do not actively divide. Hence statement D is incorrect.

Step 5: Select correct combination. Correct statements: \[ A,\ B,\ C \] Therefore: \[ \boxed{ \text{Option (3)} } \] Final Conclusion: Correct statements regarding cell cycle are: \[ A,\ B,\ C \] Hence correct answer is: \[ \boxed{(3)\ A,\ B\ \&\ C\ Only} \]