Cell cycle and Cell division

These MCQs refers to the study of the cell cycle that focuses on mechanisms regulating the timing and frequency of DNA duplication and cell division, also defining cell which spends most of its time in what is called interphase, and during this time it grows, replicates its chromosomes, and prepares for cell division.

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In Meiosis, the chromatids separate during

Metaphase I Anaphase I Anaphase II Metaphase II

The S phase marks the period during which replication of DNA takes place. It is during this time that the content of DNA doubles, from

2C to 4C 4C to 2C (1n or 2n) (2n or 1n)

Recombination of genes occur at,

Prophase I in meiosis

Prophase II in meiosis

Metaphase II in meiosis

Prophase in mitosis

Four daughter cells formed after meiosis are,

Genetically different

Multinucleate

Genetically similar

Anucleate

In animal cells, cytokinesis involves,

The contraction of the contractile ring of microfilament

Depolymerisation of kinetochore microtubules

A protein kinase that phosphorylates other enzymes

The separation of sister chromatids

Anastral mitosis is found in,

All living organisms

Lower animals.

Higher plants

Higher animals.

The major event that occurs during the anaphase of mitosis, which brings about the equal distribution of chromosomes, is

Splitting of the centromeres

Splitting of the chromatids

Replication of the genetic material

Condensation of the chromatin

In mitosis, nuclear envelope and nucleolus disappear during,

Metaphase

Interphase

Prophase

Telophase

During which stage the chromosomes first become visible.

Anaphase

Metaphase

Prophase

Telophase

During which stages (or prophase I substages) of meiosis do you expect to find the bivalents and DNA replication respectively?

Zygotene and S phase (of interphase prior to prophase I)

Both

Pachytene and interphase (just prior to prophase I)

None of these

During which stages (or prophase I substages) of meiosis do you expect to find the bivalents and DNA replication respectively?

Zygotene and S phase (of interphase prior to prophase I)

Both

Pachytene and interphase (just prior to prophase I)

None of these

Karyokinesis is the term used for,

Division of cytoplasm

Division of nucleoplasm

Division of nucleus

Separation of daughter chromosomes

The two chromatids of a metaphase chromosome represent,

Replicated chromosomes to be separated at anaphase

Homologous chromosomes of a diploid set

Non-homologous chromosomes joined at the centromere

Maternal and paternal chromosomes joined at the centromere

If you are provided with root-tips of onion in your class and are asked to count the chromosomes which of the following stages can you most conveniently look into:

Prophase

Anaphase

Telophase

Metaphase

If you are provided with root-tips of onion in your class and are asked to count the chromosomes which of the following stages can you most conveniently look into:

Prophase

Anaphase

Telophase

Metaphase

The interphase is divided into.

G1 phase (Gap1)

S phase (Synthesis)

G2 phase (Gap2)

All of these stages.

In plants apical cells and the cambium tissue continue to divide all their life, they are called.

Meristemic tissue

Cambium tissue