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Biology MCQs

81 Questions Subject Test
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Cell BiologyHuman PhysiologyGeneticsEcology
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Medium css fpsc ppsc Uploaded: 14 Jul 2026

Which molecule is the primary energy currency of cells?

  • A ATP
  • B ADP
  • C NAD
  • D NADP
42
Medium fpsc ppsc nts Uploaded: 05 Aug 2026

Which part of the eye is the coloured ring that controls pupil size regulating light entry?

  • A Cornea
  • B Retina
  • C Iris
  • D Lens
43
Medium fpsc ppsc nts Uploaded: 14 Jul 2026

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

  • A Photosynthesis
  • B Osmosis
  • C Transpiration
  • D Respiration
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Medium fpsc ppsc nts Uploaded: 14 Jul 2026

Which scientist developed the modern system of classification for organisms?

  • A Carl Linnaeus
  • B Charles Darwin
  • C Gregor Mendel
  • D Louis Pasteur
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Medium fpsc ppsc nts Uploaded: 14 Jul 2026

Which gland is called the master gland of the endocrine system?

  • A Thyroid gland
  • B Pituitary gland
  • C Adrenal gland
  • D Pancreas
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Medium ppsc Uploaded: 06 Aug 2026

What is the powerhouse process that produces ATP called?

  • A Photosynthesis
  • B Fermentation
  • C Cellular respiration
  • D Osmosis
47
Medium css fpsc ppsc Uploaded: 14 Jul 2026

Which molecule carries genetic information from DNA to ribosomes for protein synthesis?

  • A mRNA
  • B tRNA
  • C rRNA
  • D snRNA
48
Medium css fpsc ppsc Uploaded: 14 Jul 2026

Which chromosomal disorder is caused by the presence of an extra chromosome 21?

  • A Turner syndrome
  • B Down syndrome
  • C Klinefelter syndrome
  • D Patau syndrome
49
Medium fpsc ppsc nts Uploaded: 14 Jul 2026

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

  • A Vitamin A
  • B Vitamin C
  • C Vitamin D
  • D Vitamin K
50
Medium css fpsc ppsc Uploaded: 14 Jul 2026

What is the process by which species change over time through natural selection?

  • A Adaptation
  • B Evolution
  • C Mutation
  • D Speciation
51
Medium fpsc ppsc nts Uploaded: 05 Aug 2026

Which type of muscle is under voluntary control and attached to bones to enable movement?

  • A Cardiac muscle
  • B Skeletal muscle
  • C Smooth muscle
  • D Involuntary muscle
52
Medium fpsc ppsc nts Uploaded: 14 Jul 2026

What is the term for the bending of a plant toward light called?

  • A Geotropism
  • B Phototropism
  • C Hydrotropism
  • D Thigmotropism
53
Medium fpsc ppsc nts Uploaded: 14 Jul 2026

What is the term for the symbiotic relationship where both organisms benefit?

  • A Commensalism
  • B Parasitism
  • C Mutualism
  • D Amensalism
54
Medium css fpsc ppsc Uploaded: 14 Jul 2026

What is the term for an organism that carries a recessive allele but does not show the trait?

  • A Dominant
  • B Carrier
  • C Homozygous
  • D Heterozygous
55
Medium fpsc ppsc nts Uploaded: 14 Jul 2026

Which blood group is known as the universal donor?

  • A AB positive
  • B A negative
  • C B negative
  • D O negative
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Medium fpsc ppsc nts Uploaded: 05 Aug 2026

Which disease is caused by Mycobacterium tuberculosis primarily affecting the lungs?

  • A Typhoid
  • B Cholera
  • C Malaria
  • D Tuberculosis
57
Medium fpsc ppsc nts Uploaded: 14 Jul 2026

Which part of the human brain controls balance and coordinates muscular movement?

  • A Cerebellum
  • B Cerebrum
  • C Medulla oblongata
  • D Thalamus
58
Medium fpsc ppsc nts Uploaded: 14 Jul 2026

What is the term for all the organisms of the same species living in the same area at the same time?

  • A Community
  • B Ecosystem
  • C Population
  • D Biome
59
Medium fpsc ppsc nts Uploaded: 14 Jul 2026

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

  • A Activity slows gradually then speeds up
  • B Activity remains constant
  • C Enzyme is denatured and loses activity
  • D Enzyme replicates to compensate
60
Medium fpsc ppsc nts Uploaded: 14 Jul 2026

Which vitamin is essential for the clotting of blood?

  • A Vitamin A
  • B Vitamin C
  • C Vitamin E
  • D Vitamin K
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