Strategies for Enhancement in Food Production

NEET Biology · 50 questions · Page 3 of 5 · Click an option or "Show Solution" to reveal answer

Q21

Outbreeding is an important strategy of animal husbandry because it:

A helps in accumulation of superior genes

B is useful in overcoming inbreeding depression

C is useful in producing purelines of animals

D exposes harmful recessive genes that are eliminated by selection

Correct Answer

Option B

Solution

Outbreeding helps to overcome inbreeding depression by introducing new genetic material.

Q22

Which of the following enhances or induces fusion of protoplasts?

A Sodium chloride and potassium chloride

B IAA and kinetin

C Polyethylene glycol and sodium nitrate

D IAA and gibberellins

Correct Answer

Option C

Solution

Polyethylene glycol and sodium nitrate play important roles in the fusion of protoplasts for somatic hybridization.

Q23

In vitro clonal propagation in plants is characterized by:

A Microscopy

B Northern blotting

C Electrophoresis and HPLC

D PCR and RAPD

Correct Answer

Option D

Solution

Clonal propagation can be characterized and verified by PCR and RAPD (Random Amplification of Polymorphic DNA).

Q24

The viability of seeds is tested by:

A 2,3,5 triphenyl tetrazolium chloride

B Safranine

C 2,6 dichlorophenol indophenols

D DMSO

Correct Answer

Option A

Solution

Dehydrogenase enzymes in living tissue reduce tetrazolium chloride to formazan (reddish compound), indicating seed viability.

Q25

In plant breeding programmes, the entire collection of plants/seeds having all the diverse alleles for all genes in a crop is called:

A germplasm collection

B evaluation and selection of parents

C selection of superior recombinants

D cross-hybridisation among the selected parents

Correct Answer

Option A

Solution

The entire collection of plants/seeds having all diverse alleles for all genes in a given crop is called germplasm collection.

Q26

Green revolution in India occurred during:

A 1980s

B 1950s

C 1960s

D 1970s

Correct Answer

Option C

Solution

Green revolution in India occurred in the 1960s, introducing high-yielding varieties making India self-sufficient in food grains.

Q27

Himgiri, developed by hybridisation and selection for disease resistance against rust pathogens is a variety of:

A Chilli

B Sugarcane

C Wheat

D Maize

Correct Answer

Option C

Solution

Himgiri is a variety of wheat resistant to leaf and stripe rust and hill bunt diseases.

Q28

A collection of plants and seeds having diverse alleles of all the genes of a crop is called:

A Gene library

B Genome

C Germplasm

D Herbarium

Correct Answer

Option C

Solution

The entire collection having all diverse alleles for all genes in a given crop is called germplasm collection.

Q29

Jaya and Ratna developed for green revolution in India are the varieties of:

A Bajra

B Wheat

C Maize

D Rice

Correct Answer

Option D

Solution

Jaya and Ratna are two rice varieties developed for green revolution in India.

Q30

Which one of the following is linked to the discovery of Bordeaux mixture as a popular fungicide?

A Downy mildew of grapes

B Bacterial leaf blight of rice

C Loose smut of wheat

D Black rust of wheat

Correct Answer

Option A

Solution

Bordeaux mixture was first used to control downy mildew disease of grapevine caused by Plasmopara viticola.

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