Question # 1

Chromosomes condensation occurs during .............. .

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G1-phase

G2-phase

S-phase

Interphase

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

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Apoptosis

Necrosis

Both a & b

None

In which stage of the cell cycle, the cell is preparing enzymes for chromosome duplication.

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G1

G2

S

M

Which event distinguishes meiosis from mitosis?

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Condensation of chromosomes

Loss of the nuclear membrane

Formation of metaphase plate

Pairing of homologous chromosomes

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

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Anaphase

Telophase

Metaphase

Prophase

Down's sayndrome is an autosomal non-disjunction of chromosomes number ............. .

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22

12

21

14

The prokaryotic cell division is termed as :

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Binary fission

Multiple fission

Cytokinesis

Karyokinesis

For mitosis, the chromosomes of the cells are duplicated during interphase. When do the chromosomes duplicated for meiosis?

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Before meiosis 1

Before meiosis 2

During Meiosis 1

Do not duplicate

During the division phase the cell ................ into two.

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Split

Divide

Both

None

Type of spindle fibre which attaches the chromosomes is called:

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Kinetochore

Non Kinetochore

Bot a and b

Centromere

Chromosomes are not visible during:

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Anaphase

Prophase

Interphase

Metaphase

In this phase of Interphase the cell prepares proteins for the production of spindle fibres.

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G2 phase

G O phase

S phase

G I Phase

The phenomenon of spread of tumor is called:

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Malignant

Benign

Metastasis

Mitosis

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