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

  • A Adaptation
  • B Evolution
  • C Mutation
  • D Speciation
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Correct Answer: Option B — Evolution
Explanation: Evolution is the process by which populations of organisms change over successive generations through natural selection mutation genetic drift and gene flow.
Submitted by: PaperMCQs
42
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
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Correct Answer: Option B — Skeletal muscle
Explanation: Skeletal muscle also called striated or voluntary muscle is attached to bones via tendons and is under conscious control enabling all voluntary body movements and locomotion.
Submitted by: PaperMCQs
43
Easy fpsc Uploaded: 06 Aug 2026

Which blood cells are primarily responsible for fighting infection?

  • A Red blood cells
  • B Platelets
  • C White blood cells
  • D Plasma cells
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Correct Answer: Option C — White blood cells
Explanation: White blood cells, or leukocytes, form part of the immune system and defend the body against pathogens like bacteria and viruses. They identify and destroy foreign invaders, playing a crucial role in disease resistance.
Submitted by: PaperMCQs
44
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
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Correct Answer: Option B — Phototropism
Explanation: Phototropism is the growth response of a plant toward a light source caused by unequal distribution of auxin making cells on the shaded side elongate more than those on the lit side.
Submitted by: PaperMCQs
45
Easy fpsc ppsc nts Uploaded: 14 Jul 2026

Which scientist is known as the Father of Biology?

  • A Charles Darwin
  • B Gregor Mendel
  • C Aristotle
  • D Louis Pasteur
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Correct Answer: Option C — Aristotle
Explanation: Aristotle is widely regarded as the Father of Biology for his systematic study and classification of living organisms in ancient Greece making him the first to create a scientific framework for biology.
Submitted by: PaperMCQs
46
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What is the term for the total genetic material present in an organism?

  • A Genotype
  • B Genome
  • C Phenotype
  • D Karyotype
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Correct Answer: Option B — Genome
Explanation: The genome comprises all the genetic material, including genes and non-coding sequences, found within an organism's cells. Mapping genomes, such as the Human Genome Project, has advanced understanding of genetic diseases and biological functions.
Submitted by: PaperMCQs
47
Hard css fpsc Uploaded: 14 Jul 2026

What is the process by which organisms survive extreme heat and drought by entering a dormant state?

  • A Aestivation
  • B Hibernation
  • C Migration
  • D Dormancy only
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Correct Answer: Option A — Aestivation
Explanation: Aestivation is a state of dormancy similar to hibernation but entered during hot and dry summer conditions by animals like lungfish snails and some amphibians to prevent dehydration.
Submitted by: PaperMCQs
48
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
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Correct Answer: Option C — Mutualism
Explanation: Mutualism is a type of symbiotic relationship where both organisms involved benefit from their interaction such as the relationship between bees and flowers.
Submitted by: PaperMCQs
49
Medium fpsc Uploaded: 06 Aug 2026

Which part of the human ear is responsible for maintaining balance?

  • A Cochlea
  • B Eardrum
  • C Ear lobe
  • D Semicircular canals
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Correct Answer: Option D — Semicircular canals
Explanation: The semicircular canals, located in the inner ear, contain fluid and sensory hair cells that detect changes in head position and rotational movement, sending signals to the brain to help maintain body balance and coordination.
Submitted by: PaperMCQs
50
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
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Correct Answer: Option B — Carrier
Explanation: A carrier is an organism that is heterozygous for a recessive allele meaning it carries one dominant and one recessive allele and does not express the recessive trait but can pass it to offspring.
Submitted by: PaperMCQs
51
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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Correct Answer: Option D — O negative
Explanation: O negative blood is the universal donor type because it lacks A B and Rh antigens on red blood cells making it compatible for transfusion to recipients of any blood type.
Submitted by: PaperMCQs
52
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
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Correct Answer: Option D — Tuberculosis
Explanation: Tuberculosis is a bacterial infection caused by Mycobacterium tuberculosis primarily affecting the lungs and spread through airborne droplets making it one of the world's deadliest infectious diseases.
Submitted by: PaperMCQs
53
Hard css fpsc Uploaded: 14 Jul 2026

What is the process by which the kidneys filter blood to form urine?

  • A Ultrafiltration
  • B Secretion
  • C Reabsorption
  • D Digestion
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Correct Answer: Option A — Ultrafiltration
Explanation: Ultrafiltration is the first process in urine formation where high pressure in the glomerulus forces water glucose salts and urea out of the blood into the Bowman's capsule.
Submitted by: PaperMCQs
54
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
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Correct Answer: Option A — Cerebellum
Explanation: The cerebellum coordinates voluntary movements maintains balance and posture and fine-tunes motor activities by processing information from the sensory systems and other brain areas.
Submitted by: PaperMCQs
55
Hard fpsc Uploaded: 06 Aug 2026

What is the study of heredity and variation in organisms called?

  • A Ecology
  • B Taxonomy
  • C Genetics
  • D Physiology
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Correct Answer: Option C — Genetics
Explanation: Genetics is the branch of biology studying how traits are passed from parents to offspring through genes. Gregor Mendel's pea plant experiments laid the foundation for understanding patterns of inheritance and genetic variation.
Submitted by: PaperMCQs
56
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
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Correct Answer: Option C — Population
Explanation: A population is a group of individuals of the same species living in the same area at the same time who can interbreed and share genetic resources.
Submitted by: PaperMCQs
57
Easy fpsc ppsc nts Uploaded: 14 Jul 2026

What is the full form of DNA?

  • A Deoxyribose Nucleic Acid
  • B Di-nitrogen Acid
  • C Dinucleic Acid
  • D Deoxyribonucleic Acid
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Correct Answer: Option D — Deoxyribonucleic Acid
Explanation: DNA stands for Deoxyribonucleic Acid and is the molecule that carries the genetic instructions for the development functioning growth and reproduction of all known organisms.
Submitted by: PaperMCQs
58
Easy fpsc Uploaded: 06 Aug 2026

Which blood vessels carry oxygenated blood away from the heart?

  • A Veins
  • B Capillaries
  • C Arteries
  • D Venules
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Correct Answer: Option C — Arteries
Explanation: Arteries typically carry oxygen-rich blood away from the heart to tissues throughout the body, with the notable exception of the pulmonary artery. Their thick, muscular walls withstand the high pressure generated by heart contractions.
Submitted by: PaperMCQs
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
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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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60
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
Permalink
Correct Answer: Option B — B lymphocytes
Explanation: B lymphocytes or B cells are white blood cells that produce specific antibodies when activated by an antigen providing targeted humoral immunity against pathogens.
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