Question # 1

Specific enzymes are synthesized in:

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G₀

G₂

G₁

S phase

Nucleus is visible only in:

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Prophase

Interphase

Anaphase

Metaphase

Find the correct statement.

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Homologous chromosomes form pairs during mitosis

Chromosomes do not duplicate in the interphase preceding meiosis-I

Homologous chromosomes form pairs during mitosis but not mitosis

Spindles are not required during meiosis

The phase which can exist for life is:

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G₀

G₁

G₂

S phase

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

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Split

Divide

Both

None

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

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22

12

21

14

What reason would you suggest for the fact that the total DNA content of each daughter cell is reduced during meiosis?

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Chromosomes do not replicate during the interphase before meiosis 1

Chromosomes do not duplicate between meiosis 1 and 2

Half of the chromosomes form each gamete are broken

Sister chromatids separate during anaphase of meiosis 1

The class of man is:

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Insecta

Mammalia

Magnoliopsida

Proteobacteria

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

In turner's syndrome female have ................. chromosomes .

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46

45

47

22

The condensation of chromosomes is completed during:

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Telophase

Prophase

Anaphase

Metaphase

The chromosomes are arranged along the equator of spindle in:

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Prophase

Telophase

Anaphase

Metaphase

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

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Apoptosis

Necrosis

Both a & b

None

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