Cell Cycle and Cell Division PYQ — Page 2

Bivalent or Tetrad formation is a characteristic feature observed during :

Which stage of meiosis can last for months or years in the oocytes of some verterbrates?

In meiosis, crossing over and exchange of genetic material between homologous chromosomes are catalyzed by the enzyme.

Identify the correct sequence of events during Prophase I of meiosis: (a) Synapsis of homologous chromosomes (b) Chromosomes become gradually visible under microscope (c) Crossing over between non-sister chromatids of homologous chromosomes (d) Terminalisation of chiasmata (e) Dissolution of synaptonemal complex Choose the correct answer from the options given below :

The fruit fly has $8$ chromosomes $(2n)$ in each cell. During the interphase of mitosis if the number of chromosomes at ${G}_{1}$ phase is $8.$ What would be the number of chromosomes after the S phase?

Match Column - I with Column - II. <table class="pyq-table"><tbody><tr><td colspan="2" rowspan="1">Column -I</td><td colspan="2" rowspan="1">Column -II</td></tr><tr><td>(a)</td><td>$S$ phase</td><td>(i)</td><td>Proteins are synthesized</td></tr><tr><td>(b)</td><td>${G}_{2}$ phase</td><td>(ii)</td><td>Inactive phase</td></tr><tr><td>(c)</td><td>Quiescent stage</td><td>(iii)</td><td>Interval between mitosis and initiation of DNA replication</td></tr><tr><td>(d)</td><td>${G}_{1}$ phase</td><td>(iv)</td><td>DNA replication</td></tr></tbody></table>Choose the correct answer from options given below.

Which stage of meiotic prophase shows terminalisation of chiasmata as its distinctive feature?

Which of the following stages of meiosis involves division of centromere?

The centriole undergoes duplication during:

Match the following events that occur in their respective phases of the cell cycle and select the correct option: <table class="pyq-table"><tbody><tr><td colspan="2" rowspan="1">Column-I</td><td colspan="2" rowspan="1">Column-II</td></tr><tr><td>(a)</td><td>${G}_{1}$ phase</td><td>(i)</td><td>Cell grows and organelle duplication</td></tr><tr><td>(b)</td><td>$S$ phase</td><td>(ii)</td><td>$\mathrm{DNA}$ replication and chromosome duplication</td></tr><tr><td>(c)</td><td>${G}_{2}$ phase</td><td>(iii)</td><td>Cytoplasmic growth</td></tr><tr><td>(d)</td><td>Metaphase in $M-$phase</td><td>(iv)</td><td>Alignment of chromosomes</td></tr></tbody></table>

Identify the correct statement with regard to G$_{1}$ phase (Gap 1) of interphase.

Match the following with respect to meiosis <table class="pyq-table"><tbody><tr><td>(a)</td><td>Zygotene</td><td>(i)</td><td>Terminalization</td></tr><tr><td>(b)</td><td>Pachytene</td><td>(ii)</td><td>Chiasmata</td></tr><tr><td>(c)</td><td>Diplotene</td><td>(iii)</td><td>Crossing over</td></tr><tr><td>(d)</td><td>Diakinesis</td><td>(iv)</td><td>Synapsis</td></tr></tbody></table>Select the correct option from the following

Attachment of spindle fibers to kinetochores of chromosomes becomes evident in:

During meiosis $I,$ in which stage synapsis takes place?

In a mitotic cycle, the correct sequence of phases is:

Some dividing cells exit the cell cycle and enter vegetative inactive stage. This is called quiescent stage (G$_{0}$). This process occurs at the end of

Dissolution of the synaptonemal complex occurs during

Cells in G$_{0}$ phase:

After meiosis-I, the resultant daughter cells have

The correct sequence of phases of cell cycle is:

Crossing over takes place between which chromatids and in which stage of the cell cycle?

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

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

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