Plant Physiology-Plant Growth and Development (NEET Biology): Questions 23 - 29 of 46

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Question number: 23

» Plant Physiology » Plant Growth and Development » Conditions of Growth

MCQ▾

Question

Where would you look for active cell division in plant?

Choices

Choice (4) Response

a.

In the internodal region.

b.

In the pith cells.

c.

In the cells of cortex.

d.

At the tip of root and shoot.

Question number: 24

» Plant Physiology » Plant Growth and Development » Growth Regulators-Auxin, Gibberellin, Cytokinin, Ethylene, ABA

MCQ▾

Question

Specific property attributed to gibberellin is

Choices

Choice (4) Response

a.

Elongation of genetically dwarf plant

b.

Shortening of genetically tall plants

c.

Promotion of rooting

d.

Yellowing of young leaves.

Question number: 25

» Plant Physiology » Plant Growth and Development » Growth Regulators-Auxin, Gibberellin, Cytokinin, Ethylene, ABA

MCQ▾

Question

Senescence is inhibited by

Choices

Choice (4) Response

a.

Gibberellic acid

b.

Abscissic acid

c.

Ethylene

d.

Cytokinin

Question number: 26

» Plant Physiology » Plant Growth and Development » Growth Regulators-Auxin, Gibberellin, Cytokinin, Ethylene, ABA

MCQ▾

Question

Bioassay for gibberellin is

Choices

Choice (4) Response

a.

Avena curvature test.

b.

Dwarf maize/barley aleurone test.

c.

Green leaf test/Richmond-Lang effect.

d.

Cell division/bud induction test.

Question number: 27

» Plant Physiology » Plant Growth and Development » Growth Regulators-Auxin, Gibberellin, Cytokinin, Ethylene, ABA

MCQ▾

Question

Which of the following movement is not related to change in auxin levels?

Choices

Choice (4) Response

a.

Movement of sunflower tracking the direction of the sun.

b.

Movement of roots towards soil.

c.

Movement of shoot towards light.

d.

Nyctinastic leaf movement

Question number: 28

» Plant Physiology » Plant Growth and Development » Growth Regulators-Auxin, Gibberellin, Cytokinin, Ethylene, ABA

MCQ▾

Question

An excised leaf does not turn yellow if it is induced to root. This is attributed to synthesis it root of OR Leaf ageing is retarded by

Choices

Choice (4) Response

a.

Ethylene

b.

Cytokinins

c.

Gibberellins

d.

Auxins

Question number: 29

» Plant Physiology » Plant Growth and Development » Growth Regulators-Auxin, Gibberellin, Cytokinin, Ethylene, ABA

MCQ▾

Question

Which one of the following responses of plants to growth hormones is true for ethylene?

Choices

Choice (4) Response

a.

Increase in ripening of fruits

b.

Decrease in abscission of flowers.

c.

Decrease in the formation of female flowers

d.

Increase in cell elongation

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