Cell Cycle and Cell Division PYQ — Page 3

A cell at the telophase stage is observed by a student in a plant brought from the field. He tells his teacher that this cell is not like other cells at the telophase stage. There is no formation of the cell plate and thus the cell is containing more chromosomes as compared to other dividing cells. This would result in:

During cell growth, DNA synthesis takes place in

In meiosis, crossing over is initiated at _________.

Spindle fibres attach on to:

Which of the following is not a characteristic feature during mitosis in somatic cells?

Match the stages of meiosis of Column-I to their characteristic features in Column-II and select the correct option using the codes given below: <table class="pyq-table"><tbody><tr><td colspan="2">Column-I</td><td colspan="2">Column–II</td></tr><tr><td>a.</td><td>Pachytene</td><td>(i)</td><td>The pairing of homologous chromosomes</td></tr><tr><td>b.</td><td>Metaphase I</td><td>(ii)</td><td>Terminalization of chiasmata</td></tr><tr><td>c.</td><td>Diakinesis</td><td>(iii)</td><td>Crossing-over takes place</td></tr><tr><td>d.</td><td>Zygotene</td><td>(iv)</td><td>Chromosomes align at the equatorial plate</td></tr></tbody></table>

Which phase occupies the maximum part of cell cycle?

Arrange the following events of meiosis in the correct sequence: i. Crossing over ii. Synapsis iii. Terminalisation of chiasmata iv. Disappearance of the nucleolus

A somatic cell that has just completed the S phase of its cell cycle, as compared to gamete of the same species, has:

Select the correct option: <table class="pyq-table"><tbody><tr><td></td><td>I</td><td></td><td>II</td></tr><tr><td>($a$)</td><td>Synapsis aligns homologous chromosomes</td><td>($i$)</td><td>Anaphase – II</td></tr><tr><td>($b$)</td><td>Synthesis of RNA and protein</td><td>($ii$)</td><td>Zygotene</td></tr><tr><td>($c$)</td><td>Action of enzyme recombinase</td><td>($iii$)</td><td>${G}_{2}$ – phase</td></tr><tr><td>($d$)</td><td>Centromeres do not separate but chromatids move towards opposite poles</td><td>($iv$)</td><td>Anaphase – I</td></tr><tr><td></td><td></td><td>($v$)</td><td>Pachytene</td></tr></tbody></table>

The enzyme recombinase is required at which stage of meiosis:

In the 'S' phase of the cell cycle:

During which phase(s) of cell cycle, amount of DNA in a cell remains at 4 C level if the initial amount is denoted as 2C?

A stage of mitosis is shown in the diagram. Which stage is it and what are its characteristics? 

The complex formed by a pair of synapsed homologous chromosomes is called

During the metaphase stage of mitosis, spindle fibres attach to chromosomes at:

A stage in cell division is shown in the figure. Select the answer which gives correct identification of the stage with its characteristics 

During meiosis I, the chromosomes start pairing at:

Given below is the representation of a certain event at a particular stage of a type of cell division. Which is this stage? 

Identify the meiotic stage in which the homologous chromosomes separate while the sister chromatids remain associated at their centromeres

During gamete formation, the enzyme recombinase participates during

At metaphase, chromosomes are attached to the spindle fibres by their

Select the correct option with respect to mitosis.

Which stages of cell division do the following figures $A$ and $B$ represent respectively?