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

Plant Growth and Development Mock Exam-10

Question No:1

Spraying of Gibberellins over sugarcane can increase the yield by how much?

[A] 20 tonnes/acre
[B] 20 kg/acre
[C] 20 quintet/acre
[D] None



Question No:2

What change does it bring hi juvenile conifers when sprayed with GAs?

[A] hastens maturity period
[B] hastens germination period
[C] hastens dormancy period
[D] None



Question No:3

Spraying of GAs on juvenile conifers causes

[A] early flowering
[B] early germination
[C] early seed production
[D] all



Question No:4

Cytokinins have specific effects on

[A] cytokinesis
[B] cytokinesis
[C] cytoketosis
[D] cytolysis



Question No:5

In what form cytokinins were discovered?

[A] Terpenes
[B] Toluenes
[C] Kinetin
[D] None



Question No:6

Gibberellins promoters bolting in which plants?

[A] Beet
[B] Cabbage
[C] Both
[D] None



Question No:7

Kinetin is _____

[A] Cytokinins
[B] Modified form of adenine
[C] Purine
[D] All



Question No:8

Kinetin was first discovered from

[A] corn-kernels
[B] autoclaved herring sperm DNA
[C] coconut milk
[D] all



Question No:9

Naturally kinetin occurs in

[A] coconut milk
[B] pineapple
[C] corn
[D] none



Question No:10

Naturally available cytokinin—like substance is

[A] kinetin
[B] zeatin
[C] both
[D] none



Question No:11

Zeatin was isolated from what?

[A] corn-kernels
[B] coconut milk
[C] both
[D] none



Question No:12

Where are natural cytokinins synthesized?

[A] Areas of rapid cell division
[B] Areas undergoing differentiation
[C] Both
[D] None



Question No:13

Where are natural cytokinins synthesized?

[A] Root apices
[B] Young fruits
[C] Developing shoot buds
[D] All



Question No:14

How many of the following PGR help to overcome apical dominance? Auxins, Gibberellins, Cytokinins, Ethylene

[A] 1
[B] 2
[C] 3
[D] 4



Question No:15

How many of the following PGRs help in delay of senescence? Auxins, Gibberellins, Cytokinins, Ethylene

[A] 1
[B] 2
[C] 3
[D] 4