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CRPF CT/CISF HC Biology Questions with Answers & Explanations

20 Biology questions from the General Knowledge & Awareness section of CRPF CT/CISF HC, each with the correct answer and a worked explanation. Try each question first, then tap Show answer to check. When you're ready, take the timed chapter-wise test to see your all-India rank.

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Question 1

DNA stands for

  1. ADiribonucleic acid
  2. BDeoxyribose nitric acid
  3. CDinucleic acid
  4. DDeoxyribonucleic acid
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Answer: (D) Deoxyribonucleic acid
Question 2

The universal blood donor group is

  1. AA positive
  2. BO negative
  3. CAB positive
  4. DB negative
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Answer: (B) O negative
Question 3

The basic unit of life is the

  1. AOrgan
  2. BAtom
  3. CCell
  4. DTissue
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Answer: (C) Cell
Question 4

Deficiency of iodine causes

  1. AAnaemia
  2. BRickets
  3. CScurvy
  4. DGoitre
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Answer: (D) Goitre
Question 5

The first vaccine (smallpox) was developed by

  1. AEdward Jenner
  2. BJonas Salk
  3. CAlexander Fleming
  4. DLouis Pasteur
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Answer: (A) Edward Jenner
Question 6

DNA stands for

  1. ADeoxyribose nitric acid
  2. BDiribonucleic acid
  3. CDeoxyribonucleic acid
  4. DDinucleic acid
Show answer
Answer: (C) Deoxyribonucleic acid
Question 7

Deficiency of Vitamin A causes

  1. ANight blindness
  2. BRickets
  3. CAnaemia
  4. DScurvy
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Answer: (A) Night blindness
Question 8

Malaria is caused by

  1. AA bacterium
  2. BPlasmodium
  3. CA fungus
  4. DA virus
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Answer: (B) Plasmodium
Question 9

How many chambers does the human heart have?

  1. AFive
  2. BThree
  3. CFour
  4. DTwo
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Answer: (C) Four
Question 10

Which blood cells fight infection?

  1. APlasma proteins
  2. BRed blood cells
  3. CWhite blood cells
  4. DPlatelets
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Answer: (C) White blood cells

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Question 11

Deficiency of Vitamin D causes

  1. ABeriberi
  2. BScurvy
  3. CPellagra
  4. DRickets
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Answer: (D) Rickets
Question 12

The smallest bone in the human body is the

  1. AIncus
  2. BStapes
  3. CFemur
  4. DRadius
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Answer: (B) Stapes
Question 13

The largest gland in the human body is the

  1. APancreas
  2. BLiver
  3. CPituitary
  4. DThyroid
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Answer: (B) Liver
Question 14

Deficiency of iron causes

  1. AAnaemia
  2. BNight blindness
  3. CGoitre
  4. DBeriberi
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Answer: (A) Anaemia
Question 15

The study of plants is called

  1. AEcology
  2. BZoology
  3. CBotany
  4. DMycology
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Answer: (C) Botany
Question 16

How many bones are there in an adult human body?

  1. A208
  2. B206
  3. C196
  4. D212
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Answer: (B) 206
Question 17

The universal blood donor group is

  1. AA positive
  2. BAB positive
  3. CO negative
  4. DB negative
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Answer: (C) O negative
Question 18

Deficiency of Vitamin A causes

  1. AScurvy
  2. BRickets
  3. CNight blindness
  4. DAnaemia
Show answer
Answer: (C) Night blindness
Question 19

Which part of the plant carries food from leaves to other parts?

  1. APhloem
  2. BXylem
  3. CStomata
  4. DRoot hair
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Answer: (A) Phloem
Question 20

The longest bone in the human body is the

  1. AFibula
  2. BFemur
  3. CHumerus
  4. DTibia
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Answer: (B) Femur

These are RankerClub practice questions written in the CRPF CT/CISF HC pattern. They are not official SSC/IBPS/RRB papers.

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