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Biology MCQs

93 Questions Subject Test
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61
Hard nts Uploaded: 06 Aug 2026

Which plant tissue is responsible for transporting water and minerals?

  • A Xylem
  • B Phloem
  • C Epidermis
  • D Cambium
Permalink
Correct Answer: Option A — Xylem
Explanation: Xylem tissue consists of specialized cells that form continuous tubes transporting water and dissolved minerals from roots upward to leaves and other plant parts, supporting photosynthesis and maintaining overall plant hydration and structural rigidity.
Submitted by: PaperMCQs
62
Easy fpsc ppsc nts Uploaded: 14 Jul 2026

What is the scientific study of heredity and genetic variation called?

  • A Ecology
  • B Biochemistry
  • C Genetics
  • D Cytology
Permalink
Correct Answer: Option C — Genetics
Explanation: Genetics is the branch of biology that studies heredity and genetic variation in organisms exploring how traits are passed from parents to offspring through genes.
Submitted by: PaperMCQs
63
Medium fpsc ppsc nts Uploaded: 05 Aug 2026

Which structure in flowering plants contains ovules that develop into seeds after fertilisation?

  • A Stamen
  • B Petal
  • C Ovary
  • D Anther
Permalink
Correct Answer: Option C — Ovary
Explanation: The ovary is the female reproductive structure in flowering plants containing ovules that after fertilisation develop into seeds while the ovary wall develops into the surrounding fruit.
Submitted by: PaperMCQs
64
Easy fpsc ppsc nts Uploaded: 14 Jul 2026

How many chambers does the human heart have?

  • A Two
  • B Three
  • C Four
  • D Five
Permalink
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
65
Medium fpsc ppsc nts Uploaded: 14 Jul 2026

What is the chemical messenger secreted by endocrine glands into the bloodstream called?

  • A Hormone
  • B Enzyme
  • C Neurotransmitter
  • D Antibody
Permalink
Correct Answer: Option A — Hormone
Explanation: Hormones are chemical messengers secreted by endocrine glands directly into the bloodstream and transported to target organs where they regulate physiological processes.
Submitted by: PaperMCQs
66
Medium fpsc ppsc nts Uploaded: 14 Jul 2026

What is the term for a community of organisms interacting with their physical environment?

  • A Biome
  • B Population
  • C Ecosystem
  • D Community
Permalink
Correct Answer: Option C — Ecosystem
Explanation: An ecosystem is a biological community of interacting organisms together with the physical environment in which they live including both biotic living and abiotic non-living components.
Submitted by: PaperMCQs
67
Easy fpsc ppsc nts Uploaded: 14 Jul 2026

What is the process by which green plants make their own food using sunlight?

  • A Respiration
  • B Transpiration
  • C Photosynthesis
  • D Fermentation
Permalink
Correct Answer: Option C — Photosynthesis
Explanation: Photosynthesis is the process by which green plants use sunlight carbon dioxide and water to produce glucose and oxygen in chloroplasts through light-dependent and light-independent reactions.
Submitted by: PaperMCQs
68
Medium fpsc ppsc nts Uploaded: 14 Jul 2026

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

  • A Antigens
  • B Enzymes
  • C Hormones
  • D Antibodies
Permalink
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
69
Easy nts Uploaded: 06 Aug 2026

What term describes two different species living together where both benefit?

  • A Parasitism
  • B Commensalism
  • C Predation
  • D Mutualism
Permalink
Correct Answer: Option D — Mutualism
Explanation: Mutualism is a symbiotic relationship where both interacting species gain benefits. A classic example is bees pollinating flowers while collecting nectar, benefiting both the plant's reproduction and the bee's food supply simultaneously.
Submitted by: PaperMCQs
70
Easy fpsc ppsc nts Uploaded: 14 Jul 2026

Which scientist proposed the theory of evolution by natural selection?

  • A Gregor Mendel
  • B Louis Pasteur
  • C Charles Darwin
  • D Aristotle
Permalink
Correct Answer: Option C — Charles Darwin
Explanation: Charles Darwin proposed the theory of evolution by natural selection in his 1859 book On the Origin of Species explaining how species change over generations through differential reproduction.
Submitted by: PaperMCQs
71
Medium fpsc ppsc nts Uploaded: 14 Jul 2026

Which type of tissue in plants transports dissolved food from leaves to other parts?

  • A Phloem
  • B Cambium
  • C Xylem
  • D Epidermis
Permalink
Correct Answer: Option A — Phloem
Explanation: Phloem is the vascular tissue in plants responsible for transporting dissolved sugars and other organic compounds produced during photosynthesis from leaves to all parts of the plant.
Submitted by: PaperMCQs
72
Medium fpsc ppsc nts Uploaded: 14 Jul 2026

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

  • A Aestivation
  • B Migration
  • C Dormancy
  • D Hibernation
Permalink
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
73
Medium fpsc ppsc nts Uploaded: 14 Jul 2026

Which branch of biology deals with the study of viruses?

  • A Bacteriology
  • B Mycology
  • C Parasitology
  • D Virology
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Correct Answer: Option D — Virology
Explanation: Virology is the branch of biology that studies viruses including their structure classification evolution mechanisms of infection and methods of control.
Submitted by: PaperMCQs
74
Medium nts Uploaded: 06 Aug 2026

Which part of the eye controls the amount of light entering it?

  • A Retina
  • B Iris
  • C Cornea
  • D Lens
Permalink
Correct Answer: Option B — Iris
Explanation: The iris is the colored, muscular part of the eye that adjusts the size of the pupil to regulate light entry. It contracts in bright light and dilates in dim conditions to optimize vision.
Submitted by: PaperMCQs
75
Easy fpsc ppsc nts Uploaded: 14 Jul 2026

Which type of organisms break down dead organic matter into simpler inorganic substances?

  • A Producers
  • B Decomposers
  • C Consumers
  • D Omnivores
Permalink
Correct Answer: Option B — Decomposers
Explanation: Decomposers such as bacteria and fungi break down dead organic matter into simpler inorganic substances recycling nutrients back into the ecosystem for use by producers.
Submitted by: PaperMCQs
76
Medium fpsc ppsc nts Uploaded: 14 Jul 2026

Which part of the human brain is responsible for voluntary movement and higher cognitive functions?

  • A Cerebellum
  • B Medulla oblongata
  • C Cerebrum
  • D Hypothalamus
Permalink
Correct Answer: Option C — Cerebrum
Explanation: The cerebrum is the largest part of the human brain responsible for voluntary movement perception memory language reasoning and other higher cognitive functions.
Submitted by: PaperMCQs
77
Medium fpsc ppsc nts Uploaded: 14 Jul 2026

What is the term for an interconnected network of food chains in an ecosystem?

  • A Pyramid of biomass
  • B Trophic level
  • C Food web
  • D Food chain
Permalink
Correct Answer: Option C — Food web
Explanation: A food web is a complex network of interconnected food chains in an ecosystem representing the multiple feeding relationships and energy pathways between organisms.
Submitted by: PaperMCQs
78
Medium fpsc ppsc nts Uploaded: 14 Jul 2026

Which type of cell division produces gametes with half the chromosome number?

  • A Budding
  • B Meiosis
  • C Mitosis
  • D Binary fission
Permalink
Correct Answer: Option B — Meiosis
Explanation: Meiosis is the type of cell division that produces four genetically diverse gametes each containing half the chromosome number of the parent cell ensuring genetic diversity in sexual reproduction.
Submitted by: PaperMCQs
79
Medium fpsc ppsc nts Uploaded: 14 Jul 2026

What term describes the specific molecule an enzyme acts upon?

  • A Substrate
  • B Product
  • C Cofactor
  • D Coenzyme
Permalink
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
80
Easy ppsc nts Uploaded: 14 Jul 2026

What is the largest organ in the human body?

  • A Skin
  • B Liver
  • C Lungs
  • D Heart
Permalink
Correct Answer: Option A — Skin
Explanation: The skin is the largest organ of the human body covering the entire external surface and functions as a protective barrier regulating temperature and enabling sensation.
Submitted by: PaperMCQs
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