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Biology MCQs

128 Questions Subject Test
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Build a clear understanding of living organisms, cells, genetics, human systems and the environment through carefully selected practice questions.

Cell BiologyHuman PhysiologyGeneticsEcology
Useful for academic exams, entry tests, FPSC, PPSC and general science preparation.
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81
Easy fpsc Uploaded: 06 Aug 2026

Which blood vessels carry oxygenated blood away from the heart?

  • A Veins
  • B Capillaries
  • C Arteries
  • D Venules
82
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
83
Hard css fpsc ppsc Uploaded: 14 Jul 2026

Which type of white blood cell produces antibodies against specific pathogens?

  • A Neutrophils
  • B B lymphocytes
  • C Monocytes
  • D Eosinophils
84
Hard fpsc Uploaded: 06 Aug 2026

What is the term for a trait that is masked by another trait in heterozygous organisms?

  • A Dominant
  • B Homozygous
  • C Recessive
  • D Codominant
85
Easy fpsc ppsc nts Uploaded: 14 Jul 2026

What is the site of protein synthesis in a cell?

  • A Ribosome
  • B Nucleus
  • C Mitochondria
  • D Golgi apparatus
86
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
87
Hard css fpsc ppsc Uploaded: 05 Aug 2026

Which type of white blood cell produces specific antibodies against antigens?

  • A Neutrophils
  • B B lymphocytes
  • C Monocytes
  • D Cytotoxic T cells
88
Easy fpsc ppsc nts Uploaded: 14 Jul 2026

What is the term for the movement of substances from high concentration to low concentration without energy?

  • A Active transport
  • B Osmosis
  • C Endocytosis
  • D Diffusion
89
Medium fpsc ppsc nts Uploaded: 14 Jul 2026

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

  • A Three
  • B Five
  • C Four
  • D Six
90
Easy fpsc ppsc nts Uploaded: 14 Jul 2026

Which disease results from the inability to produce or use insulin effectively?

  • A Diabetes mellitus
  • B Hypertension
  • C Anaemia
  • D Asthma
91
Medium css fpsc ppsc Uploaded: 14 Jul 2026

Which process converts mRNA information into a protein sequence at ribosomes?

  • A Transcription
  • B Translation
  • C Replication
  • D Transduction
92
Easy fpsc ppsc nts Uploaded: 14 Jul 2026

Which scientist is known as the Father of Genetics?

  • A Charles Darwin
  • B Gregor Mendel
  • C Louis Pasteur
  • D Aristotle
93
Medium fpsc Uploaded: 06 Aug 2026

What is the term for organisms that feed on both plants and animals?

  • A Herbivores
  • B Carnivores
  • C Decomposers
  • D Omnivores
94
Hard css fpsc ppsc Uploaded: 05 Aug 2026

Which process converts excess amino acids into urea in the liver for kidney excretion?

  • A Deamination
  • B Denaturation
  • C Gluconeogenesis
  • D Glycolysis
95
Easy fpsc ppsc nts Uploaded: 14 Jul 2026

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

  • A Carbon dioxide
  • B Oxygen
  • C Nitrogen
  • D Hydrogen
96
Medium fpsc ppsc nts Uploaded: 14 Jul 2026

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

  • A Beriberi
  • B Pellagra
  • C Scurvy
  • D Rickets
97
Medium fpsc Uploaded: 06 Aug 2026

Which gas do fish primarily extract from water using their gills?

  • A Oxygen
  • B Carbon dioxide
  • C Nitrogen
  • D Hydrogen
98
Hard css fpsc Uploaded: 14 Jul 2026

Which type of ecological succession begins on bare rock or sand where no soil exists?

  • A Secondary succession
  • B Allogenic succession
  • C Biotic succession
  • D Primary succession
99
Medium fpsc ppsc nts Uploaded: 14 Jul 2026

What is the term for organisms that can make their own food through photosynthesis?

  • A Decomposers
  • B Consumers
  • C Heterotrophs
  • D Autotrophs
100
Medium css fpsc ppsc Uploaded: 14 Jul 2026

Which type of nutrition involves organisms that feed on dead and decaying organic matter?

  • A Saprotrophic
  • B Autotrophic
  • C Holozoic
  • D Parasitic
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