NEET Biology plant growth development mcqs,model,mock,sample exam

Plant Growth and Development Mock Exam-11

Question No:1

A plant tissue is undergoing senescence, which PGR would be found in it?

[A] Auxins
[B] Gibberellins
[C] Cytokinins
[D] Ethylene



Question No:2

Large amounts of ethylene is synthesized in

[A] Ripening fruit
[B] Newly grown leaf
[C] Apex
[D] Axial bud



Question No:3

What are the influences of ethylene on plants?

[A] horizontal growth of seedlings
[B] swelling of the axis
[C] apical hook formation in dicot seedling
[D] all



Question No:4

What is the of ethylene effect on plant organs, especially leaves and flowers?

[A] promotes abscission
[B] promotes senescence
[C] both
[D] none



Question No:5

What is the effect of ethylene on ripening fruit?

[A] increases rate of growth
[B] increase in rate of respiration
[C] both
[D] none



Question No:6

Rise is rate of respiration is called

[A] respiratory climax
[B] respiratory rise
[C] respiratory climactic
[D] none



Question No:7

Which of the following PGR is used to break seed and bud dormancy?

[A] Auxins
[B] Gibberellins
[C] Cytokinins
[D] Ethylene



Question No:8

Ethylene initiates germination in which seed?

[A] Mustard
[B] Peanut
[C] Both
[D] None



Question No:9

Sprouting of potato tubers is initiated by which of the following PGR?

[A] Cytokinin
[B] Ethylene
[C] Both
[D] None



Question No:10

How does ethylene help plants to increase their absorption surface?

[A] promote growth of root
[B] promote formation of root hair
[C] both
[D] none



Question No:11

Ethylene is used to initiate flowering and for synchronizing fruit set in which fruit?

[A] Apple
[B] Pineapple
[C] Banana
[D] All



Question No:12

Ethylene induces flowering in which fruit?

[A] Mango
[B] Apple
[C] Pineapple
[D] All



Question No:13

Which of the following is the most widely used PGR in agriculture?

[A] IAA
[B] ABA
[C] GA3
[D] Ethylene



Question No:14

Which of the following is a characteristic of ethephon?

[A] readily absorbed
[B] transported within the plant
[C] releases ethylene slowly
[D] all



Question No:15

Ethephon hastens fruit ripening in

[A] Mango
[B] Tomato
[C] Apple
[D] Both (b) and (c)