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NTS MCQs

National Testing Service — Complete MCQ Bank

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

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1
Biology Easy

Which gas is released by organisms as a byproduct of cellular respiration?

  • ACarbon dioxide
  • BOxygen
  • CNitrogen
  • DHydrogen
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Correct Answer: Option A — Carbon dioxide
Explanation: Carbon dioxide is released as a byproduct of cellular respiration when glucose is broken down to produce ATP and must be exhaled by animals or used by plants in photosynthesis.
Submitted by: PaperMCQs
2
Biology Easy

Which gas is released by plants as a byproduct of photosynthesis?

  • ACarbon dioxide
  • BNitrogen
  • COxygen
  • DWater vapour
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Correct Answer: Option C — Oxygen
Explanation: Oxygen is released as a byproduct of photosynthesis during the light-dependent reactions when water molecules are split through photolysis providing electrons to replace those lost by chlorophyll.
Submitted by: PaperMCQs
3
Biology Medium

What happens to enzyme activity when temperature rises significantly above its optimum?

  • AActivity slows gradually then speeds up
  • BActivity remains constant
  • CEnzyme is denatured and loses activity
  • DEnzyme replicates to compensate
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Correct Answer: Option C — Enzyme is denatured and loses activity
Explanation: When temperature rises significantly above the optimum the enzyme is denatured meaning the active site changes shape so the substrate can no longer bind and activity is permanently lost.
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4
Biology Medium

What term describes the specific molecule an enzyme acts upon?

  • ASubstrate
  • BProduct
  • CCofactor
  • DCoenzyme
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Correct Answer: Option A — Substrate
Explanation: The substrate is the specific molecule upon which an enzyme acts binding at the active site to form an enzyme-substrate complex and being converted into products.
Submitted by: PaperMCQs
5
Biology Medium

What is the role of enzymes in biological reactions?

  • AAct as biological catalysts to speed up reactions
  • BStore genetic information
  • CProvide energy for reactions
  • DTransport oxygen in blood
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Correct Answer: Option A — Act as biological catalysts to speed up reactions
Explanation: Enzymes are biological catalysts that speed up chemical reactions in living organisms by lowering activation energy without being consumed or permanently altered in the process.
Submitted by: PaperMCQs
6
Biology Easy

Which type of disease is caused by a pathogen and can be transmitted from one person to another?

  • ADeficiency disease
  • BCommunicable disease
  • CGenetic disease
  • DDegenerative disease
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Correct Answer: Option B — Communicable disease
Explanation: Communicable diseases are caused by pathogens such as bacteria viruses fungi or parasites and can be transmitted directly or indirectly from one person to another.
Submitted by: PaperMCQs
7
Biology Easy

Which type of disease is caused by a deficiency of essential nutrients in the diet?

  • ACommunicable disease
  • BHereditary disease
  • CAutoimmune disease
  • DDeficiency disease
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Correct Answer: Option D — Deficiency disease
Explanation: Deficiency diseases result from the lack of essential nutrients in the diet such as vitamins and minerals causing conditions like scurvy rickets anaemia and goitre.
Submitted by: PaperMCQs
8
Biology Medium

What is the process by which organisms adapt to extreme cold by entering a state of dormancy?

  • AAestivation
  • BMigration
  • CDormancy
  • DHibernation
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Correct Answer: Option D — Hibernation
Explanation: Hibernation is a state of dormancy entered by some animals during cold winter months to conserve energy by lowering metabolic rate body temperature and heart rate.
Submitted by: PaperMCQs
9
Biology Easy

What is the term for the movement of populations of organisms from one region to another seasonally?

  • AMigration
  • BHibernation
  • CAestivation
  • DDormancy
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Correct Answer: Option A — Migration
Explanation: Migration is the seasonal movement of animals from one region to another typically following food availability and climate changes as seen in birds fish and wildebeest.
Submitted by: PaperMCQs
10
Biology Medium

How many kingdoms are in the traditional five-kingdom system of classification?

  • AThree
  • BFive
  • CFour
  • DSix
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Correct Answer: Option B — Five
Explanation: The traditional five-kingdom system classifies all life into Monera Protista Fungi Plantae and Animalia based on cell type nutrition mode and body organisation.
Submitted by: PaperMCQs
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