Cell Cycle and Cell Division

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

1. bivalent
2. axoneme
3. equatorial plate
4. kinetochore.

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

1. Telophase Endoplasmic reticulum and nucleolus not reformed yet.
2. Telophase Nuclear envelope reforms, Golgi complex reforms.
3. Late anaphase Chromosomes move away from equatorial plate, Golgi complex not present.
4. Cytokinesis Cell plate formed, mitochondria distributed between two daughter cells.

During meiosis I, the chromosomes start pairing at

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

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

1. kinetochore
2. both centromere and kinetochore
3. centromere, kinetochore and areas adjoining centromere
4. centromere.

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

1. Anaphase - Centromeres split and chromatids separate and start moving away.
2. Late prophase - Chromosomes move to spindle equator.
3. Metaphase - Spindle fibers attached to kinetochores, centromeres split and chromatids separate.
4. Metaphase - Chromosomes moved to spindle equator, chromosomes made up of two sister chromatids.

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

1. Metaphase I
2. Metaphase II
3. Anaphase I
4. Anaphase II

During gamete formation, the enzyme recombinase participates during

1. metaphase I
2. anaphase II
3. prophase I
4. prophase II.

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

1. Prophase of Mitosis
2. Both prophase and metaphase of mitosis
3. Prophase I during meiosis
4. Prophase-II during meiosis

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

1. satellites
2. secondary constrictions
3. kinetochores
4. centromeres.

Select the correct option with respect to mitosis.

1. Chromatids separate but remain in the centre of the cell in anaphase
2. Chromatids start moving towards opposite poles in telophase
3. Golgi complex and endoplasmic reticulum are still visible at the end of prophase
4. Chromosomes move to the spindle equator and get aligned along equatorial plate in metaphase