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Plant Biology PYQs

25 previous year questions across 11 subtopics · answers and explanations included

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One question at a time, instant feedback, score at the end.

Showing 25 questions · page 1 of 2

1

Which of the following plant hormones employs a phosphorelay system to regulate gene expression?

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2

The mature anther wall comprises an epidermis followed by a layer of radially elongated cells with fibrous bands of callose called endothecium whose function is

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3

Which class of phytochromes is highly abundant in etiolated seedlings and is also light labile?

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4

Which part of a plant would be most suitable for raising virus-free plants for micropropagation?

EasyView answer

5

Pruning helps in making the hedge dense because

EasyView answer

6

Synthetic seeds are mostly derived from

MediumView answer

7

Skotomorphogenesis is characterized by:

MediumPhotomorphogenesis & SkotomorphogenesisView answer

8

Nod gene products:

MediumNitrogen Fixation - Nod FactorsView answer

9

Cryptochromes control photomorphogenesis in response to:

MediumPhotoreceptors - CryptochromesView answer

10

miRNAs are major regulators of gene expression. In an experiment, it was observed that gene 'X' is a direct target of miRNA 'A'. Upon overexpression of miRNA 'A' in Arabidopsis thaliana:

MediummiRNA Regulation in PlantsView answer

11

VirA and VirG form a two component signaling system during Agrobacterium infection in plants. In an experiment, VirG was mutated resulting in nonfunctional VirG protein. Which one of the following consequences is most likely?

MediumAgrobacterium & T-DNA TransferView answer

12

Which one of the following genes can be used to generate male sterile crop plants?

MediumMale Sterility in Crop PlantsView answer

13

Which one among the following is the correct function of leghaemoglobin?

MediumNitrogen Fixation - LeghaemoglobinView answer

14

A spectrum that depicts the magnitude of response of a biological system to light as a function of wavelength is called:

MediumAction Spectrum & PhotobiologyView answer

15

In which organelle of seeds are stored oils converted to fatty acids and glycerol during germination?

HardView answer

16

Which one of the following is NOT a typical feature of the hypersensitive response observed in plants during the attack of invading microbes?

MediumHypersensitive Response & Plant ImmunityView answer

17

Given below are two statements: Statement I: Large subunit of rubisco is encoded by chloroplast genome while small subunit of Rubisco is encoded by nuclear genome Statement II: Small subunit of rubisco has a transit peptide, which is cleaved off at the time…

MediumRubisco & Chloroplast GeneticsView answer

18

The most likely sub-cellular localization of NAC transcription factors is:

MediumTranscription Factors - NAC FamilyView answer

19

The specific energy source for the reaction ADP + phosphate \rightarrow ATP by the enzyme ATP synthetase (CF1 Coupling Factor) in thylakoid membranes is

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20

In plants, the cells adjacent to the egg cell in an ovule are known as

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