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Cell Cycle and Cell Division · Question 57

NEET 2013 (Karnataka)MCQEasy📈 Topic in 50% papers+4−1
1

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.

Answer

(1) kinetochore

Solution

As per NCERT, the centromere of each chromosome carries small disc-shaped structures on its surface called kinetochores.

⇒ Kinetochores serve as the sites of attachment of spindle fibres to the chromosomes.

⇒ At metaphase, spindle fibres attach to the kinetochores and the chromosomes are moved to the metaphase plate.

∴ Spindle fibres attach to chromosomes at the kinetochore.

Answer: (1)

NEET 2013 (Karnataka)

Keep practising — Cell Cycle and Cell Division

2

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.
NEET 2013 (Karnataka)
3

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
AIPMT 2012 (Mains)
4

During gamete formation, the enzyme recombinase participates during

  1. metaphase I
  2. anaphase II
  3. prophase I
  4. prophase II.
AIPMT 2012 (Prelims)
5

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
AIPMT 2012 (Prelims)
6

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

  1. satellites
  2. secondary constrictions
  3. kinetochores
  4. centromeres.
AIPMT 2011 (Mains)
7

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
AIPMT 2011 (Prelims)
8

During mitosis, ER and nucleolus begin to disappear at

  1. late prophase
  2. early metaphase
  3. late metaphase
  4. early prophase
AIPMT 2010 (Prelims)
9

Which stages of cell division do the following figures A and B represent respectively? [Figure]

  1. A Prophase, B Anaphase
  2. A Metaphase, B Telophase
  3. A Telophase, B Metaphase
  4. A Late anaphase, B Prophase
AIPMT 2010 (Prelims)
10

Synapsis occurs between

  1. mRNA and ribosomes
  2. spindle fibres and centromere
  3. two homologous chromosomes
  4. a male and a female gamete
AIPMT 2009
11

Given below is a schematic break-up of the phases/stages of cell cycle. Which one of the following is the correct indication of the stage/phase in the cell cycle? [figure]

  1. C - karyokinesis
  2. D - synthetic phase
  3. A - cytokinesis
  4. B - metaphase
AIPMT 2009

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