Cell Cycle and Cell Division

The centriole undergoes duplication during :

1. G2 phase
2. S-phase
3. Prophase
4. Metaphase

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

1. G1 phase
2. S phase
3. G2 phase
4. M phase

Match the following with respect to meiosis Select the correct option from the following

1. (A)-(iv), (B)-(iii), (C)-(ii), (D)-(i)
2. (A)-(iii), (B)-(iv), (C)-(i), (D)-(ii)
3. (A)-(i), (B)-(ii), (C)-(iv), (D)-(iii)
4. (A)-(ii), (B)-(iv), (C)-(iii), (D)-(i)

Dissolution of the synaptonemal complex occurs during

1. Diplotene
2. Zygotene
3. Pachytene
4. Leptotene

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

1. Cell is metabolically active, grows but does not replicate its DNA.
2. DNA synthesis or replication takes place.
3. Nuclear Division takes place.
4. Reorganisation of all cell components takes place.

Cells in G0 phase:

1. suspend the cell cycle
2. terminate the cell cycle
3. exit the cell cycle
4. enter the cell cycle

The correct sequence of phases of cell cycle is:

1. S G1 G2 M
2. G1 S G2 M
3. M G1 G2 S
4. G1 G2 S M

The stage during which separation of the paired homologous chromosomes begins is

1. zygotene
2. pachytene
3. diplotene
4. diakinesis

Which of the following options gives the correct sequence of events during mitosis?

1. Condensation Nuclear membrane disassembly Arrangement at equator Centromere division Segregation Telophase
2. Condensation Crossing over Nuclear membrane disassembly Segregation Telophase
3. Condensation Arrangement at equator Centromere division Segregation Telophase
4. Condensation Nuclear membrane disassembly Crossing over Segregation Telophase

Anaphase Promoting Complex (APC) is a protein degradation machinery necessary for proper mitosis of animal cell. If APC is defective in a human cell, which of the following is expected to occur?

1. Chromosomes will be fragmented.
2. Chromosomes will not segregate.
3. Recombination of chromosome arms will occur.
4. Chromosomes will not condense.