Question # 1

During mitosis the number of chromosomes becomes ............... .

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Double

Remain same

Becomes Half

None

Specific enzymes are synthesized in:

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G₀

G₂

G₁

S phase

................ occurs in somatic cells.

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Meiosis I

Meiosis II

Mitosis

None

Programmed cell death is called ............... .

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Apoptosis

Necrosis

Both a & b

None

During which phase of mitosis spindles are formed?

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G2

Interphase

Prophase

Metaphase

Which one of the followings stage is similar in mitosis and meiosis?

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Prophase

Anaphase

Metaphase

Telophase

How many cells die each day due to apoptosis in humans?

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50 - 70 Billions

50 - 70 Millions

50-70 trillions

20 - 30 Millions

Which phase of meiosis is similar to mitosis?

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Prophase I

Telophase II

Meiosis I

Meiosis II

Which of the following is unique to mitosis and not a part of meiosis?

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Homologous chromosomes pair forming bivalents

Homologous chromosomes cross over

Chromosomes pairs are broken during anaphase

Chromatids separate during anaphase

Chromosomes become double during:

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G₁

G₂

G₀

S phase

If you observe cell like this one, what phase of mitosis is it?

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Anaphase

Telophase

Metaphase

Prophase

Uncoiling of chromosomes take place during:

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Anaphase

Telophase

Anaphase

Metaphase

The longest phase is:

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Mitotic phase

Meiosis

Cell cycle

Interphase

Who suggested the first system of classification of organisms?

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Al-Jahiz

Aristotle

John Ray

Averroes

Which of the following structure is absent in animals?

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Spindle

Centrioles

Chromatids

Phragmoplant

the failure of replicated chromosomes to separate during meiosis is ............... .

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Disjunction

Non-disjunction

Both a & b

None

Nuclei of human cell contain ............ autosomes.

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23 pairs

22 pairs

12 pairs

14 pairs

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