Question # 1

Stomata close when the guard cells;

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Lose water

Gain chloride ions

Became turgid

Gain potassium ions

The connection between stomach & esophagus is called ............. sphincter.

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Cardiac

Muscular

Both

None

Prokaryotic ribosomes is ...................

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20s

30

70s

80s

The_______is the membrane enclosed structure in eukaryotic cells that contains the DNA of the cell.

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Mitochondria

Chloroplast

Nucleolus

Nucleus

During which phase of mitosis spindles are formed?

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G2

Interphase

Prophase

Metaphase

Induced Fit model was proposed by:

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Emil Fischer

Melcher

Koshland

Saugeo

Platelets life span in about ........... days.

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6-7

7-8

5-6

8-9

There are_______________chromosomes in radish.

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46

18

16

23

The cell death due to tissue damage is:

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Apoptosis

Necrosis

Metastasis

Synapsis

Anabolism constitute ................ processes.

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Construction

Destruction

Both a & b

None

The phases of cell cycle are:

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Interphase

Division phase

Both a and b

None

Who used the term enzyme first time?

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Oscar Hertwing

Winhelm kuhne

W-Flemming

T.H.Morgan

A scientific theory has which of the following properties?

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It agrees with the available evidence

It cannot be rejected

It has been absolute proven

It does not need to be altered in the light of new evidences

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