WBCS MAIN BIOLOGY MCQ Questions with Answers P23

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Page 23

2529221. “Montreal Protocol” is related to

A

white tiger

B

chloroflurocarbon

C

water pollution

D

agriculture

B

Correct Answer: B. chloroflurocarbon

1303222. The disease caused by the deficiency of vitamin B12

A

Normocytic anemia

B

Pernicious anemia

C

Aplastic anemia

D

Sickle cell anemia

B

Correct Answer: B. Pernicious anemia

2510223. Smallpox was declared eradicated from the world in

A

1975

B

1980

C

1996

D

2008

B

Correct Answer: B. 1980

1431224. The stage of mitosis in which chromosomes become V, J, L, or I shaped?

A

Anaphase

B

Telophase

C

Prophase

D

Metaphase

A

Correct Answer: A. Anaphase

2507225. In human eyes, the image of an object is formed on

A

cornea

B

iris

C

pupil

D

retina

D

Correct Answer: D. retina

1405226. Coconut inflorescence is

A

Cyathium

B

Spadix

C

Racemose

D

Hypanthium

B

Correct Answer: B. Spadix

1425227. The gene for Haemophilia is

A

Y - linked

B

Located in autoscme

C

X- linked recessive

D

X - linked dominant

C

Correct Answer: C. X- linked recessive

1394228. n essential constituent of the plant cell is the carbohydrate

A

Starch

B

Lignin

C

Cellulose

D

Sucrose

C

Correct Answer: C. Cellulose

1400229. As per the concept of Scheduler Indian wildlife conservation, Rhinoceros indicia is incorporated in

A

Schedule I

B

Schedule II

C

Schedule III

D

None of the above

B

Correct Answer: B. Schedule II

1368230. Ribosomes play a significant role in

A

Lipid synthesis

B

Respiration

C

Photosynthesis

D

Protein synthesis

D

Correct Answer: D. Protein synthesis

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Biology MCQ Practice Set For UPSC | SSC | Rail | RRB | State PSC P22

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Page 22

1264211. According to Darwin, the unit of Natural Selection is

A

Gene

B

Species

C

Individual

D

Family

B

Correct Answer: B. Species

1297212. The number of cervical vertebrae in the mammal is

A

Seventy-seven

B

Eleven

C

Seven

D

Seventeen

C

Correct Answer: C. Seven

2532213. Who is the father of ‘Immunology’?

A

Robert koch

B

Louis pastuer

C

Edward jenner

D

Landsteiner

C

Correct Answer: C. Edward jenner

1373214. The following animal is called a friend of farmer :

A

Rhizobium

B

Honey-bee

C

Goat

D

Earthworm

D

Correct Answer: D. Earthworm

1275215. A viral disease is

A

Typhoid

B

Yellow Fever

C

Cancer

D

Leukemia

B

Correct Answer: B. Yellow Fever
Explanation:

Yellow fever is spread by a species of mosquito common to areas of Africa and South America. It is spread by Aedes aegypti mosquitoes, which also transmit dengue and Zika viruses.

1396216. Normal human blood is

A

Neutral

B

Variable

C

Acidic

D

Alkaline

D

Correct Answer: D. Alkaline

1435217. Vinegar is a dilute solution of

A

Ethanol

B

Acetic acid

C

Formaldehyde

D

Formic acid

B

Correct Answer: B. Acetic acid

1383218. The ingredient that assists the clotting of blood is

A

Vitamin D

B

Vitamin K

C

Vitamin A

D

Folic acid

B

Correct Answer: B. Vitamin K

1437219. Fixation of nitrogen is meant

A

Manufacture of nitrogen from the air

B

Conversion of nitrogen into nitric acid

C

Liquefaction of nitrogen

D

Conservation of atmospheric nitrogen into a useful component

D

Correct Answer: D. Conservation of atmospheric nitrogen into a useful component

1434220. A Cladogram depicts the hypothesis of

A

Genetic relationship

B

Taxonomic relationship

C

Evolutionary relationship

D

Phonetic relationship

C

Correct Answer: C. Evolutionary relationship

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Biology MCQ (General Science) Objective Q&A P21

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Page 21

1415201. An example of the modified underground stem is

A

Groundnut

B

Turnip

C

Carrot

D

Potato

D

Correct Answer: D. Potato

1260202. In plants, the receptor for detecting photoperiod is

A

Protein molecule

B

Gradient of K⁺

C

Sensory cell

D

Sensory organelles

A

Correct Answer: A. Protein molecule

1299203. The scientific name of Vitamin C is

A

Ascorbic acid

B

Lactic acid

C

Acetic acid

D

Muriatic acid

A

Correct Answer: A. Ascorbic acid

1440204. Watson and Crick are famous for their discovery of

A

Structure of DNA

B

Antibodies

C

Life history of Plasmodium Vivax

D

Vaccinia

A

Correct Answer: A. Structure of DNA

1274205. one of the following is the natural auxin?

A

2,4-D

B

IBA

C

NAA

D

IAA

D

Correct Answer: D. IAA

1283206. The phytohormone responsible for senescence

A

Gibberellin

B

Ethylene

C

Cytokinin

D

Auxin

B

Correct Answer: B. Ethylene

1398207. Which of the following is a terrestrial alga?

A

Spirulina

B

Sargassum

C

Chlorella

D

Terentepohlia

D

Correct Answer: D. Terentepohlia

2503208. Which of the following is a medicinal crop?

A

Sugarcane

B

Aloe vera

C

Cotton

D

Mahua

B

Correct Answer: B. Aloe vera

2528209. Organization related to “Read Data Book” or “Red List” is

A

U.T.E.S.

B

I.U.C.N.

C

I.B.W.C.

D

W.W.F.

B

Correct Answer: B. I.U.C.N.

1446210. Which of the following can indicates the air pollution of an area?

A

Bacteria

B

Algae

C

Fungus

D

Mosses

D

Correct Answer: D. Mosses

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Biology MCQ For WBCS Prelims and Mains Exams P20

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Page 20

2505191. Which of the following diseases is caused by protozoa?

A

Cholera

B

Diphtheria

C

Pneumonia

D

Malaria

D

Correct Answer: D. Malaria

1267192. Name of an insectivorous plant

A

Basak

B

Pitcher plant

C

Gulancha

D

Nayantara

B

Correct Answer: B. Pitcher plant

1342193. Which one of the following is not an autotroph?

A

Fungus

B

Fern

C

Grass

D

Green Algae

A

Correct Answer: A. Fungus

1327194. Photosynthetic plants store glucose as

A

Cellulose

B

Glycogen

C

Sucrose

D

Starch

D

Correct Answer: D. Starch

1314195. Restriction enzymes are synthesized by

A

Bacteria only

B

Yeast and bacteria only

C

All cells

D

All eukaryotic cells

A

Correct Answer: A. Bacteria only

1316196. A peduncle is a

A

Stalk of fruit

B

Stalk of leaf

C

Stalk of flower

D

None of the above

C

Correct Answer: C. Stalk of flower

1362197. The gastric glands in the stomach produce an enzyme

A

Pepsin

B

Trypsin

C

Insulin

D

Ptyalin

A

Correct Answer: A. Pepsin

1266198. The first hormone produced by Genetic Engineering is

A

Thyroxin

B

Insulin

C

Estrogen

D

Testosterone

B

Correct Answer: B. Insulin

1310199. The scientific name of Vitamin C is

A

Ascorbic acid

B

Lactic acid

C

Acetic acid

D

Muriatic acid

A

Correct Answer: A. Ascorbic acid

1300200. Name the excretory organ of Prawn

A

Ink gland

B

Malpighian tubule

C

Salivary gland

D

Green gland

D

Correct Answer: D. Green gland

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WBCS Previous Years Questions on General Science (Biology) P19

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Page 19

1320181. Which of the following is not a stimulant?

A

Cocaine

B

Amphetamines

C

Caffeine

D

Barbiturates

D

Correct Answer: D. Barbiturates

2508182. To study meiosis in plants , the best part would be

A

Shoot apex

B

Root apex

C

Anthers

D

Leaf cells

C

Correct Answer: C. Anthers

1390183. Which metal ion is associated with Haemoglobin

A

Al⁺⁺⁺

B

Mn⁺⁺

C

Mg⁺⁺

D

Fe⁺⁺

D

Correct Answer: D. Fe⁺⁺

1402184. Oxygen was discovered by

A

Charles

B

Boyle

C

Priestley

D

Lavoisier

C

Correct Answer: C. Priestley

1428185. In the International System of Units (S.I.), number of supplementary units is

A

2

B

3

C

4

D

Many

A

Correct Answer: A. 2

1347186. An endobiotic fungus is

A

Synchytrium

B

Polyporus

C

Agaricus

D

Morchella

A

Correct Answer: A. Synchytrium

1357187. Endemic plants are those which grow in

A

On other plants

B

Geographically limited areas

C

Freshwater lakes

D

Shady places

B

Correct Answer: B. Geographically limited areas

1447188. Which is not true for bio-fertilizer?

A

Release nitrogen more slowly

B

Does not badly affect the pH of the soil

C

More efficient than chemical fertilizer

D

It is eco-friendly

C

Correct Answer: C. More efficient than chemical fertilizer

1370189. The ecological niche is the

A

An abiotic component in an ecosystem

B

A biotic component in an ecosystem

C

Both A and B

D

None of the above

B

Correct Answer: B. A biotic component in an ecosystem

1286190. Target tissue of insulin is

A

Small intestinal tissues

B

Liver tissues

C

Red Blood Cell

D

None of the above

B

Correct Answer: B. Liver tissues

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General Science Topics (Biology) - WBCS Previous Years Questions P18

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Page 18

1271171. A red rose, when seen in the green light, appears

A

White in color

B

Black in color

C

Red in color

D

Green in color

B

Correct Answer: B. Black in color

1392172. Which one of the following is a protein deficiency disease?

A

Kwashiorkor

B

Retinoblastoma

C

Pellagra

D

Ricket

A

Correct Answer: A. Kwashiorkor

2533173. Environment Protection Act (E.P.A) is also known as:

A

Umbrella legislation

B

Chhadi Mubarak

C

Environment legislation

D

Eco Saftey Law

A

Correct Answer: A. Umbrella legislation

1306174. How much percent of the human body is water by weight?

A

33

B

10

C

66

D

50

C

Correct Answer: C. 66

1288175. A virion is

A

An infective stage of the virus

B

An infective particle of bacteriophage

C

An infective particle of the virus

D

None of the above

C

Correct Answer: C. An infective particle of the virus

1436176. The enzyme 'DNA gyrase' is associated with the function of

A

Lipid biosynthesis

B

DNA damage

C

Protein syntheses

D

DNA replication

D

Correct Answer: D. DNA replication

1404177. In monohybrid cross of Mendel, when a pure tall plant was crossed with a dwarf plant, all the F1 progeny were tall, because of

A

Incomplete dominance

B

Epistasis

C

Co-dominance

D

Dominance

D

Correct Answer: D. Dominance

1302178. Presence of sunken stomata in leaves indicates the character of

A

Halophytes

B

Mesophytes

C

Hydrophytes

D

Xerophytes

D

Correct Answer: D. Xerophytes

1416179. Necton is

A

animals associated with aquatic plants

B

submerged plants in the water

C

floating organisms in the water

D

swimming organisms in the water

D

Correct Answer: D. swimming organisms in the water

1388180. From a cross between a pure Strain of plants with yellow peas and pure Strain of plants with green peas, how many different eggs are produced F1 Offspring?

A

1

B

2

C

4

D

8

B

Correct Answer: B. 2

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