Identify the correct statement with regard to G₁ phase (Gap 1) of interphase.

NEET-(Sept)2020 [Cell-Cycle-and-Cell-Division] [class-xi ]

• DNA synthesis or replication takes place.
• Reorganisation of all cell components takes place.
• Cell is metabolically active, grows but does not replicate its DNA.
• Nuclear Division takes place.
Correct Option: C  [ Cell is metabolically active, grows but does not replicate its DNA. ]

Remark:

Dissolution of the synaptonemal complex occurs during:

NEET-(Sept)2020 [Cell-Cycle-and-Cell-Division] [class-xi ]

• Pachytene
• Zygotene
• Diplotene
• Leptotene
Correct Option: C  [ Diplotene ]

Remark:

Match the following with respect to meiosis :

NEET-(Sept)2020 [Cell-Cycle-and-Cell-Division] [class-xi ]

• (A)-(III), (B)-(IV), (C)-(I), (D)-(II)
• (A)-(IV), (B)-(III), (C)-(II), (D)-(I)
• (A)-(I), (B)-(II), (C)-(IV), (D)-(III)
• (A)-(II), (B)-(IV), (C)-(III), (D)-(I)
Correct Option: B  [ (A)-(IV), (B)-(III), (C)-(II), (D)-(I) ]

Remark:

Some dividing cells exit the cell cycle and enter vegetative inactive stage. This is called quiescent stage (G₀). This process occurs at the end of:

NEET-(Sept)2020 [Cell-Cycle-and-Cell-Division] [class-xi ]

• M phase
• G₁phase
• S phase
• G₂phase
Correct Option: A  [ M phase ]

Remark:

Cells in G0 phase:

NEET-2019 [Cell-Cycle-and-Cell-Division] [class-xi ]

• enter the cell cycle
• suspend the cell cycle
• terminate the cell cycle
• exit the cell cycle
Correct Option: D  [ exit the cell cycle ]

Remark:

The correct sequence of phases of cell cycle is:

NEET-2019 [Cell-Cycle-and-Cell-Division] [class-xi ]

• G₁→ S→ G₂ → M
• M→ G₁→ G₂→ S
• G₁→ G₂→ S→ M
• S→ G₁→ G₂→ M
Correct Option: A  [ G₁→ S→ G₂ → M ]

Remark:

Spindle fibers attach to kinetochores of chromosomes during:

NEET-2024 [Cell-Cycle-and-Cell-Division] [class-xi ]

• Metaphase
• Prophase
• Telophase
• Anaphase
Correct Option: A  [ Metaphase ]

Remark:

Given below are two Statements:
Statement I: Chromomes become gradually visible under light microscope during leptotene stage.
Statement II: The begining of diplotene stage is recognized by dissolution of synaptonemal complex.
In the light of the above statements, choose the correct answer from the options given below:

NEET-2024 [Cell-Cycle-and-Cell-Division] [class-xi ]

• Both Statement I and Statement II are false.
• Both Statement I and Statement II are true.
• Statement I is false but Statement II is true.
• Statement I is true but Statement II is false.
Correct Option: D  [ Statement I is true but Statement II is false. ]

Remark:

Following are the stages of cell division:

A. Gap 2 phase
B. Cytokinesis
C. Synthesis phase
D. Karyokinesis
E. Gap 1 phase

Choose the correct sequence of stages from the options given below:

NEET-2024 [Cell-Cycle-and-Cell-Division] [class-xi ]

• E-B-D-A-C
• C-E-D-A-B
• E-C-A-D-B
• B-D-E-A-C
Correct Option: C  [ E-C-A-D-B ]

Remark:

Match List I with List II:

NEET-2024 [Cell-Cycle-and-Cell-Division] [class-xi ]

• A-I, B-II, C-IV, D-III
• A-IV, B-II, C-III, D-I
• A-IV, B-III, C-II, D-I
• A-II, B-IV, C-I, D-III
Correct Option: D  [ A-II, B-IV, C-I, D-III ]

Remark: