NEET Biology Strategies for Enhancement in Food Production MCQs Set 16

Answer: (c) a(iii), b(i), c(iv), d(ii)

Explanation:
1. Atlas 66 is a high-protein wheat, Pusa Gaurav is a mustard variety, Pusa Sawani is a bhindi (okra) variety, and Pusa Sem 3 is a flat bean variety.

Teacher's Note:
1. So a-iii, b-i, c-iv and d-ii.

Answer: (c) Pusa Sadabahar - black rot

Explanation:
1. Pusa Sadabahar is a chilli variety resistant to chilli mosaic virus, tobacco mosaic virus and leaf curl, not black rot.

Teacher's Note:
1. The other pairs are correct as given in NCERT.

Answer: (c) Fusion of isolated naked protoplasts

Explanation:
1. Cell walls are removed to get protoplasts, and the protoplasts of two different species are fused.
2. This gives a somatic hybrid, as in the pomato.

Teacher's Note:
1. Cells with walls cannot be fused directly.

Answer: (d) Germplasm collection

Explanation:
1. Germplasm collection is the first step of breeding, and it stores all the alleles of a crop.
2. Conservation is the preservation of that collection.

Teacher's Note:
1. Hybrid vigour is the superiority of the F1 hybrid.

Answer: (b) Parbhani Kranti

Explanation:
1. Parbhani Kranti was bred by transferring yellow mosaic virus resistance from a wild species of bhindi.

Teacher's Note:
1. Pusa Swarnim is a Brassica variety, Pusa Komal is cowpea and Pusa Sem 3 is flat bean.

Answer: (a) Sucrose

Explanation:
1. The medium contains sucrose as the carbon source and energy for cells.
2. Auxins and cytokinins are growth regulators, and inorganic salts supply minerals.

Teacher's Note:
1. Cultured cells cannot photosynthesise enough.

Answer: (d) All of the above

Explanation:
1. IARI released vitamin A-rich carrot, spinach and pumpkin.
2. Other crops are rich in vitamin C, iron and calcium.

Teacher's Note:
1. This is an example of biofortification.

Answer: (b) Methylophilus methylotrophus

Explanation:
1. About 250 kg of Methylophilus methylotrophus can produce 25 tonnes of protein in a day.
2. This is because it grows and doubles its biomass every 20 to 30 minutes.

Teacher's Note:
1. It is an example of single cell protein.

Answer: (c) Selection and testing of superior recombinants

Explanation:
1. After crossing, the progeny must be evaluated carefully to pick superior recombinants.
2. This is the most important step.

Teacher's Note:
1. Selected plants are then self-pollinated to become uniform.

Answer: (b) Sonalika and Kalyan Sona

Explanation:
1. Sonalika and Kalyan Sona were the high-yielding, disease-resistant wheat varieties released in 1963.

Teacher's Note:
1. Jaya and Ratna are rice varieties, and IR-8 and Taichung Native-1 are semi-dwarf rice.

Answer: (a) One

Explanation:
1. Only (c) is incorrect, since inbreeding is the method used to develop pure lines in animals.

Teacher's Note:
1. Inbreeding increases homozygosity and exposes harmful recessive genes, which can then be eliminated by selection.

Answer: (b) Artificial insemination

Explanation:
1. In artificial insemination the semen of a chosen male is introduced into the female.
2. It overcomes problems of normal mating.

Teacher's Note:
1. Semen can be frozen for later use.

Answer: (a) It is labour-intensive work

Explanation:
1. Beekeeping is a low-investment, easy cottage industry and is not labour-intensive.
2. The other statements are correct.

Teacher's Note:
1. Beekeeping needs knowledge of the nature and habits of bees.

Answer: (d) Jersey

Explanation:
1. Jersey and Brown Swiss are foreign dairy breeds.
2. Gir, Sahiwal and Red Sindhi are Indian breeds.

Teacher's Note:
1. Foreign breeds give high milk yield.

Answer: (a) 500 m away in the direction of the sun

Explanation:
1. The waggle dance is used for food sources far (more than 100 m) away.
2. A run towards the top of the comb shows that the food lies in the direction of the sun.

Teacher's Note:
1. So 500 m towards the sun.

Answer: (d) Resin

Explanation:
1. Lac is a resinous substance secreted by the lac insect.
2. It is used in making varnish, bangles and sealing wax.

Teacher's Note:
1. Wax is the product of honey bees.

Answer: (d) A-iii, B-ii, C-iv, D-i

Explanation:
1. Cowpox is caused by an orthopoxvirus, rinderpest by a paramyxovirus, foot and mouth disease by a picornavirus and rabies by a rhabdovirus.

Teacher's Note:
1. So A-iii, B-ii, C-iv and D-i.

Answer: (a) Stifling

Explanation:
1. Stifling kills the pupa by hot water or steam, and prevents it from damaging the silk when it emerges.

Teacher's Note:
1. The silk fibre is then unwound, which is reeling.

Answer: (c) Induced breeding technique in fishes

Explanation:
1. In hypophysation the pituitary extract of fish is injected into the breeding fish.
2. It induces spawning.

Teacher's Note:
1. It is used in fish culture.

Answer: (a) Remove inbreeding depression

Explanation:
1. This is out-crossing, which brings in new genes and helps to recover from inbreeding depression.

Teacher's Note:
1. Cross-breeding combines the qualities of two breeds.

Answer: (c) Sheep, Punjab

Explanation:
1. Hisardale is a sheep breed developed in Punjab by crossing Bikaneri ewes with Merino rams.
2. It is an example of cross-breeding.

Teacher's Note:
1. Cross-breeding combines the best traits of two breeds.

Answer: (a) Leghorn

Explanation:
1. Leghorn is a breed of poultry and a good layer.

Teacher's Note:
1. Sonalika and Sharbati are wheat varieties, and Jersey is a cow breed.