Cell Cycle and Cell Division (2022) - Quiz 1

Which one is false statement about G₂-phase?

• It is post-S and Pre M-phase

• In this phase cell has quantity of DNA in each cell is 4C if the DNA in G₁ phase is 2C

• In it G₀ resides

• Proteins like tubulin is formed for mitosis as well as cell growth continues

DNA replicates –

• Only once in each cell cycle

• Twice in each cell cycle

• Once in mitotic cell cycle, once in meiotic I (Reductional division) and Once in meiotic II (equational division)

• Once in mitotic cell cycle and Once in meiotic II.

In the cell cycle, mitosis occurs between –

• G₁ and S phase

• S and G₁ phase

• S and G₂ phase

• G₁ and G₂ phase

Phragmoplasts or Phragmosomes, vesicles of GB are the precursors of –

• Cell plate

• Chloropalsts

• Chromoplast

• Protoplast

Liquid endosperm in coconut is resulted due to –

• Karyokinesis followed by cytokinesis

• Failure of karyokinesis followed by cytokinesis

• Karyokinesis twice followed by single cytokinesis

• Karyokinesis is not followed by cytokinesis

Significance of mitosis is in –

• Producing identical cells genetically similar to mother cell

• Increasing cellular mass

• Swift division

At metaphase of mitosis, each chromosome consists of _________ chromatid(s) _________ centromere(s) __________ kinetochore(s) and __________ molecules of DNA –

• 2, 1, 2, 2

• 2, 2, 2, 2

• 2, 1, 1, 1

• 2, 1, 2, 1

Which of the following about the chromatids is false?

• They are replicated chromosomes still joined together at the centromere

• Both the chromatids are identical in both mitotic chromosome

• Both the sister chromatids separate in the late prophase

• In some lower plants and in some social insects haploid cells also divide by mitosis

The milestone that defines anaphase is when the chromosomes / chromatids

• Separate

• Come together

• Are at opposite poles

• Line up

Which of the following statements is correct?

*******I. Mitosis / equatorial is usually restricted to diploid cells

*******II. In some lower plants and in some social insects haploid cells also divide by mitosis

*******III. Mitosis is essential for the cell to restore the nucleo-cytoplasmic ratio

*******IV. Mitotic division in apical meristem lateral cambium results in a continuous growth throughout the life

• All are correct

• All are incorrect

• Only I and are correct

• Only IV are correct