Question # 1

During S-phase ..................... occurs.

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DNA replication

Protein synthesis

RNA transcription

Enzyme synthesis

The phase which can exist for life is:

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G₀

G₁

G₂

S phase

RNA, ribosomes and enzyme are synthesized during .............. .

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G2-phase

S-phase

G1-phase

Inretphase

Uncoiling of chromosomes take place during:

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Anaphase

Telophase

Anaphase

Metaphase

The class of man is:

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Insecta

Mammalia

Magnoliopsida

Proteobacteria

Specific enzymes are synthesized in:

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G₀

G₂

G₁

S phase

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

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22

12

21

14

Example of Apoptotic process is ............... .

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Disappearance of tadpole tail

Disappearance of web human hand

Formation of fingers of hand

All of the above

Chromosomes become double during:

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G₁

G₂

G₀

S phase

In which stage of the cell cycle each chromosomes is duplicated and so it consists of two chromatids?

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G I

S

M

G2

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

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Prophase

Anaphase

Metaphase

Telophase

Plants lack ................... .

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Protein

Centrioles

Spindle fibers

Cytokisnesis

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

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Apoptosis

Necrosis

Both a & b

None

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