On account of the disruption in education due to the corona pandemic, we're opening up our platform for teachers, free of cost. Know More →

NEET

Explore popular questions from Biology and Human Welfare for NEET. This collection covers Biology and Human Welfare previous year NEET questions hand picked by experienced teachers.

Select Subject

Physics

Chemistry

Biology

Biology and Human Welfare

Correct Marks 4

Incorrectly Marks -1

Q 1. In tissue culture medium, the embryoids formed from pollen grains is due to

Cellular totipotency

B

Organogenesis

C

Double fertilization

D

Test tube culture

Correct Marks 4

Incorrectly Marks -1

Q 2. Which statement is correct?
A. The maintenance of hives of honeybees for the production is called apiculture.
B. A group of animals related by descent and similar in most characters are called a breed.
C. The agricultural practice of breeding raising livestock is called animal husbandry.
D. The ability of plant cells to regenerate into complete plant is called somaclonal variation.

A

A and B

B

B and C

C

C and D

A, B, C

Correct Marks 4

Incorrectly Marks -1

Q 3. Match the Column A with the Column B

Column AColumn B
I. SericultureA. Beekeeping
II. PiscicultureB. Rearing of silkworm
III. ApicultureC. Micropropagation
IV. Tissue cultureD. Rearing of fishes
V. Green RevolutionE. Fish
VI. White RevolutionF. Crop plants
VII. Blue RevolutionG. Milk

A

I - D, II - C, III - B, IV - A, V - F, VI - G, VII - E

B

I - D, II - A, III - B, IV - C, V - G, VI - F, VII - E

C

I - A, II - B, III - C, IV - D, V - F, VI - G, VII - E

I - B, II - D, III - A, IV - C, V - F, VI - G, VII - E

Correct Marks 4

Incorrectly Marks -1

Q 4. Which of the following factors affect human health?
(i) Infections
(ii) Silent mutation
(iii) Life style
(iv) Genetic disorders

(i), (iii) and (iv)

B

(i), (ii) and (iv)

C

(i) and (ii)

D

(i), (ii), (iii) and (iv)

Correct Marks 4

Incorrectly Marks -1

Q 5. During anaerobic digestion of organic waste, such as in producing biogas, which one of the following is left undegraded?

A

Lipids

Lignin

C

Hemicellulose

D

Cellulose

Explanation


Correct Marks 4

Incorrectly Marks -1

Q 6. Artificial selection to obtain cows yielding higher milk output represents

directional as it pushes the mean of the character in one direction

B

disruptive as it splits the population into two, one yielding higher output and the other lower output

C

stabilising followed by disruptive as it stabilises the population to produce higher yielding cows

D

stabilising selection as it stabilises this character in the population.

Correct Marks 4

Incorrectly Marks -1

Q 7. Homozygous purelines in cattle can be obtained by

A

mating of unrelated individuals of same breed

B

mating of individuals of different breed

C

mating of individuals of different species

mating of related individuals of same breed.

Explanation


Correct Marks 4

Incorrectly Marks -1

Q 8. A true breeding plant is

A

one that is able to breed on its own

B

produced due to cross-pollination among unrelated plants

near homozygous and produces offspring of its own kind

D

always homozygous recessive in its genetic constitution.

Correct Marks 4

Incorrectly Marks -1

Q 9. Interspecific hybridisation is the mating of

A

animals within the same breed without having common ancestors

two different related species

C

superior males and females of different breeds

D

more closely related individuals within the same breed for 4 - 6 generations.

Explanation


Correct Marks 4

Incorrectly Marks -1

Q 10. Among the following edible fishes, which one is a marine fish having a rich source of omega-3 fatty acids?

A

Mystus

B

Mangur

C

Mrigala

Mackerel

Explanation


Correct Marks 4

Incorrectly Marks -1

Q 11. A system of rotating crops with legume or grass pasture to improve soil structure and fertility is called

A

strip farming

B

shifting agriculture

ley farming

D

contour farming.

Explanation


Correct Marks 4

Incorrectly Marks -1

Q 12. Outbreeding is an important strategy of animal husbandry because it

is useful in overcoming inbreeding depression

B

exposes harmful recessive genes that are eliminated by selection

C

helps in accumulation of superior genes

D

is useful in producing purelines of animals.

Explanation


Correct Marks 4

Incorrectly Marks -1

Q 13. A technique of micropropagation is

A

protoplast fusion

B

embryo rescue

C

somatic hybridisation

somatic embryogenesis.

Explanation


Correct Marks 4

Incorrectly Marks -1

Q 14. In vitro clonal propagation in plants is characterized by

PCR and RAPD

B

northern blotting

C

electrophoresis and HPLC

D

microscopy.

Explanation


Correct Marks 4

Incorrectly Marks -1

Q 15. To obtain virus-free healthy plants from a diseased one by tissue culture technique, which part/parts of the diseased plant will be taken?

A

Apical meristem only

B

Palisade parenchyma

Both apical and axillary meristems

D

Epidermis only

Explanation


Correct Marks 4

Incorrectly Marks -1

Q 16. In plant breeding programmes, the entire collection (of plants/seeds) having all the diverse alleles for all genes in a given crop is called

A

evaluation and selection of parents

germplasm collection

C

selection of superior recombinants

D

cross-hybridisation among the selected parents.

Explanation

Germplasm refers to the hereditary material transmitted to the offspring through the germ cells. It is the total content of genes. It serves as the raw material for the breeder to develop different crops. The main objective of germplasm collection is the preservation of genetic diversity of a particular plant or genetic stock for its use in the future.

Correct Marks 4

Incorrectly Marks -1

Q 17. Tissue culture technique can produce infinite number of new plants from a small parental tissue. The economic importance of the technique is in raising

genetically uniform population identical to the original parent

B

homozygous diploid plants

C

new species

D

variants through picking up somaclonal variations.

Explanation


Correct Marks 4

Incorrectly Marks -1

Q 18. Which part would be most suitable for raising virus-free plants for micropropagation?

A

Bark

B

Vascular tissue

Meristem

D

Node

Explanation


Correct Marks 4

Incorrectly Marks -1

Q 19. Green revolution in India occurred during

1960's

B

1970's

C

1980's

D

1950's

Explanation


Correct Marks 4

Incorrectly Marks -1

Q 20. "Jaya" and "Ratna" developed for green revolution in India are the varieties of

A

maize

rice

C

wheat

D

bajra

Explanation


Correct Marks 4

Incorrectly Marks -1

Q 21. 'Himgiri' developed by hybridization and selection for disease resistance against rust pathogens is a variety of

A

chilli

B

maize

C

sugarcane

wheat

Explanation


Correct Marks 4

Incorrectly Marks -1

Q 22. Polyethylene glycol method is used for

A

biodiesel production

B

seedless fruit production

C

energy production from sewage

gene transfer without a vector.

Explanation


Correct Marks 4

Incorrectly Marks -1

Q 23. Somaclones are obtained by

A

plant breeding

B

irradiation

C

genetic engineering

tissue culture.

Explanation


Correct Marks 4

Incorrectly Marks -1

Q 24. Haploids are more suitable for mutation studies than the diploids. This is because

A

haploids are more abundant in nature than diploids

all mutations, whether dominant or recessive are expressed in haploids

C

haploids are reproductively more stable than diploids

D

mutagens penetrate in haploids more effectively than in diploids.

Explanation


Correct Marks 4

Incorrectly Marks -1

Q 25. Consider the following four measures ( 1 - 4 ) that could be taken to successfully grow chickpea in an area where bacterial blight disease is common.
(1) Spray with Bordeaux mixture
(2) Control of the insect vector of the disease pathogen
(3) Use of only disease-free seeds
(4) Use of varieties resistant to the disease
Which two of the above measures can control the disease?

A

3 and 4

1 and 4

C

2 and 3

D

1 and 2

Explanation