On account of the disruption in education due to the corona pandemic, we're are providing a 7-day Free trial of our platform to teachers. 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

Chemistry

Physics

Biology

Biology and Human Welfare

Correct Marks 4

Incorrectly Marks -1

Q 1. Read the following four statements {tex} ( \mathrm { A } - \mathrm {D} {/tex}).
(A) Colostrum is recommended for the new born because it is rich in antigens.
(B) Chikungunya is caused by a Gram negative bacterium.
(C) Tissue culture has proved useful in obtaining virus-free plants.
(D) Beer is manufactured by distillation of fermented grape juice.
How many of the above statements are wrong?

Two

B

Three

C

Four

D

One

Explanation


Correct Marks 4

Incorrectly Marks -1

Q 2. The domestic sewage in large cities

A

has a high BOD as it contains both aerobic and anaerobic bacteria

is processed by aerobic and then anaerobic bacteria in the secondary treatment in Sewage Treatment Plants (STPs)

C

when treated in STPs does not really require the aeration step as the sewage contains adequate oxygen

D

has very high amount of suspended solids and dissolved salts.

Explanation



Correct Marks 4

Incorrectly Marks -1

Q 3. Continuous addition of sugars in 'fed batch' fermentation is done to

A

produce methane

B

obtain antibiotics

purify enzymes

D

degrade sewage.

Correct Marks 4

Incorrectly Marks -1

Q 4. People are said to be suffering from 'hidden hunger' if:

A

The people suffer from inadequacy of food

B

The people suffer from food and waterborne infections

The people suffer from micronutrient, protein and vitamin deficiency

D

The people suffer from carbohydrate deficiency

Correct Marks 4

Incorrectly Marks -1

Q 5. Pure line breeds refer to

Homozygosity and independent assortment

B

Homozygosity only

C

Heterozygosity

D

Heterozygosity and linkage

Correct Marks 4

Incorrectly Marks -1

Q 6. Central Sugar cane breeding research institute is situated at

A

Lucknow

B

Delhi

Coimbatore

D

Bhopal

Correct Marks 4

Incorrectly Marks -1

Q 7. Which one of the following is not a secondary metabolite?

Resins

B

Essential oils

C

Amino acids

D

Tannins

Correct Marks 4

Incorrectly Marks -1

Q 8. 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 9. Colchicine brings about

A

Chromosome aberrations

Duplication of chromosomes

C

Gene mutations

D

Quick replication

Correct Marks 4

Incorrectly Marks -1

Q 10. Which of the following has been developed by India?

A

Lysine and tryptophan rich varieties of maize.

B

High protein variety of wheat

C

Iron fortified variety of rice

All

Correct Marks 4

Incorrectly Marks -1

Q 11. 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 12. 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 13. When two unrelated individuals or lines are crossed, the performance of F1 hybrid is often superior to both its parents. This phenomenon is called

A

Metamorphosis

Heterosis

C

Transformation

D

Sphein

Correct Marks 4

Incorrectly Marks -1

Q 14. Hisardale is a new breed of sheep developed in Punjab by crossing

Marino ram and Bikaneri ewe

B

Assel ram and white leg horn ewe

C

Rhode island ram and white leg horn ewe

D

Cochin ram and Ghagus ewe

Correct Marks 4

Incorrectly Marks -1

Q 15. 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 16. Select the mismatched pair.
Name of the Plant - Plant parts - Drug obtained

A

Erythroxyion Coca - Leaves and Young twigs - Cocaine

B

Claviceps purpurea - Fruiting bodies - Lysergic acid diethylamide(LSD)

Thea Chinensis - Dried seeds - Mescaline

D

Cannabis sativa - Leaves, resin and inflorescence - Bhang, hashish

Correct Marks 4

Incorrectly Marks -1

Q 17. Select the correct option to fill up the blanks.
(i) Diseases which are easily transmitted from one person to another, are called _____ diseases.
(ii) In human body, parasite of malaria initially multiplies within the _____ and then attack the _____.
(iii) _____ is the yellowish fluid secreted by mother during the initial days of lactation.
(iv) _____ and _____ are the primary lymphoid organs.

(i) infectious (ii) liver cell, RBC, (iii) colostrums, (iv) bone marrow, thymus

B

(i) infectious, (ii) bone marrow, thymus, (iii) colostrums, (iv) liver cell, RBC

C

(i) interferon, (ii) bone marrow, thymus, (iii) colostrums, (iv) infectious, RBC

D

(i) infectious, (ii) liver, cell RBC, (iii) colostrums, (iv) spleen, lymph node

Correct Marks 4

Incorrectly Marks -1

Q 18. Which of the following statements is incorrect?

A

The species that invade a bare area are called pioneer species

B

The entire sequence of communities that successively change in a given area is called sere.

Pyrarnidofenergy is always inverted

D

Pyramid of numbers in a tree ecosystem can be inverted.

Correct Marks 4

Incorrectly Marks -1

Q 19. The tobacco products cause

A

Aneurysm

B

Polyarteritis nodosa

Thromboangiitis obliterans

D

Wernicke' syndrome

Correct Marks 4

Incorrectly Marks -1

Q 20. The virus that causes acquired immune deficiency syndrome (AIDS) parasities reduces

A

B cells

B

Cytotoxic T cells

Helper T cells

D

All

Correct Marks 4

Incorrectly Marks -1

Q 21. A 'drunk person' has earliest effect on which part of the brain?

A

Cerebrum

Cerebellum

C

Pons

D

Medulla oblongata

Correct Marks 4

Incorrectly Marks -1

Q 22. A cancerous condition known as Burkitts Lymphoma is known to be caused by virus like

A

Rous Sarcoma virus

B

Herpes simplex virus

Epstein–Barr virus 

D

Hepatitis B virus

Correct Marks 4

Incorrectly Marks -1

Q 23. Active immunity is due to

Memory cells

B

Killer T-cells

C

Helper cells

D

Suppressor T-cells

Correct Marks 4

Incorrectly Marks -1

Q 24. The hepatitis B vaccine is

A

Interferon

B

First generation vaccine

Second generation vaccine

D

Third generation vaccine

Correct Marks 4

Incorrectly Marks -1

Q 25. Normal cells are called cancerous when they show the following property

A

New blood vessels formation (angiogenesis)

B

Uncontrolled cell division

Both a and b

D

Contact inhibition