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NTS MCQs

National Testing Service — Complete MCQ Bank

1,084 Questions
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How to prepare for NTS

NTS tests evaluate aptitude, analytical reasoning, quantitative ability, English and subject knowledge for admissions, scholarships and recruitment.

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141
Biology Medium

What is the term for the process by which plants lose water vapour through their leaves?

  • APhotosynthesis
  • BOsmosis
  • CTranspiration
  • DRespiration
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Correct Answer: Option C — Transpiration
Explanation: Transpiration is the process by which plants lose water vapour through stomata in their leaves creating a suction force that draws water and minerals up from the roots.
Submitted by: PaperMCQs
142
Biology Easy

How many chambers does the human heart have?

  • ATwo
  • BThree
  • CFour
  • DFive
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Correct Answer: Option C — Four
Explanation: The human heart has four chambers two upper atria that receive blood and two lower ventricles that pump blood ensuring separation of oxygenated and deoxygenated blood.
Submitted by: PaperMCQs
143
Biology Easy

What is the name of the pigment in red blood cells that carries oxygen?

  • AMelanin
  • BChlorophyll
  • CHaemoglobin
  • DMyoglobin
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Correct Answer: Option C — Haemoglobin
Explanation: Haemoglobin is the iron-containing protein in red blood cells that binds to oxygen in the lungs and transports it to tissues throughout the body for cellular respiration.
Submitted by: PaperMCQs
144
Biology Medium

Which disease is caused by the deficiency of Vitamin B1 affecting the nervous and cardiovascular systems?

  • ABeriberi
  • BScurvy
  • CPellagra
  • DRickets
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Correct Answer: Option A — Beriberi
Explanation: Beriberi is caused by Vitamin B1 or thiamine deficiency and affects the nervous and cardiovascular systems causing muscle weakness nerve damage and heart problems.
Submitted by: PaperMCQs
145
Biology Medium

What is the deficiency disease caused by lack of Vitamin C?

  • ABeriberi
  • BPellagra
  • CScurvy
  • DRickets
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Correct Answer: Option C — Scurvy
Explanation: Scurvy is caused by Vitamin C deficiency resulting in impaired collagen synthesis which leads to bleeding gums joint pain poor wound healing and weakness.
Submitted by: PaperMCQs
146
Biology Medium

What is the deficiency disease caused by lack of Vitamin D in children?

  • AScurvy
  • BRickets
  • CBeriberi
  • DPellagra
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Correct Answer: Option B — Rickets
Explanation: Rickets is caused by Vitamin D deficiency in children leading to impaired calcium and phosphorus absorption resulting in weak soft and deformed bones.
Submitted by: PaperMCQs
147
Biology Medium

Which vitamin is essential for the formation of collagen and acts as an antioxidant?

  • AVitamin A
  • BVitamin C
  • CVitamin D
  • DVitamin K
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Correct Answer: Option B — Vitamin C
Explanation: Vitamin C is essential for collagen synthesis acting as a cofactor for enzymes that stabilise the collagen triple helix and its deficiency causes scurvy.
Submitted by: PaperMCQs
148
Biology Medium

What is the term for proteins produced by B lymphocytes in response to specific antigens?

  • AAntigens
  • BEnzymes
  • CHormones
  • DAntibodies
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Correct Answer: Option D — Antibodies
Explanation: Antibodies also called immunoglobulins are Y-shaped proteins produced by B lymphocytes that specifically bind to antigens neutralising pathogens and marking them for destruction.
Submitted by: PaperMCQs
149
Biology Medium

What is the term for a substance that triggers an immune response in the body?

  • AAntibody
  • BEnzyme
  • CAntigen
  • DHormone
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Correct Answer: Option C — Antigen
Explanation: An antigen is any substance usually a protein on the surface of a pathogen that is recognised as foreign by the immune system and triggers the production of specific antibodies.
Submitted by: PaperMCQs
150
Biology Medium

What is the term for the symbiotic relationship where one organism benefits and the other is neither helped nor harmed?

  • AMutualism
  • BParasitism
  • CAmensalism
  • DCommensalism
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Correct Answer: Option D — Commensalism
Explanation: Commensalism is a symbiotic relationship where one organism benefits while the other is neither harmed nor helped such as barnacles attaching to whales for transport.
Submitted by: PaperMCQs
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