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Biology MCQs

56 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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1
Easy fpsc ppsc nts Uploaded: 14 Jul 2026

What is the name of the pigment in red blood cells that carries oxygen?

  • A Melanin
  • B Chlorophyll
  • C Haemoglobin
  • D Myoglobin
Permalink
Correct Answer: Option C — Haemoglobin
Explanation: Haemoglobin is the iron-containing protein in red blood cells that binds to oxygen in the lungs and transports it to tissues throughout the body for cellular respiration.
Submitted by: PaperMCQs
2
Easy ppsc Uploaded: 06 Aug 2026

Which human body system removes metabolic waste products from the blood?

  • A Digestive system
  • B Respiratory system
  • C Excretory system
  • D Muscular system
Permalink
Correct Answer: Option C — Excretory system
Explanation: The excretory system, including the kidneys, bladder, and associated organs, filters metabolic waste products such as urea from the blood and eliminates them from the body as urine, maintaining internal chemical balance.
Submitted by: PaperMCQs
3
Easy pms Uploaded: 06 Aug 2026

Which organ produces insulin to regulate blood sugar levels?

  • A Liver
  • B Kidney
  • C Pancreas
  • D Spleen
Permalink
Correct Answer: Option C — Pancreas
Explanation: The pancreas contains specialized cells called islets of Langerhans that produce insulin, a hormone regulating blood glucose levels. Insufficient insulin production or resistance to it leads to diabetes, a widespread metabolic disorder worldwide.
Submitted by: PaperMCQs
4
Easy css Uploaded: 06 Aug 2026

Which structure connects muscles to bones in the human body?

  • A Ligament
  • B Tendon
  • C Cartilage
  • D Fascia
Permalink
Correct Answer: Option B — Tendon
Explanation: Tendons are tough, fibrous connective tissues that attach muscles to bones, transmitting the force generated by muscle contraction to produce skeletal movement. Ligaments, by contrast, connect bones to other bones at joints.
Submitted by: PaperMCQs
5
Easy ppsc Uploaded: 06 Aug 2026

Which human body system is responsible for producing hormones?

  • A Nervous system
  • B Skeletal system
  • C Endocrine system
  • D Muscular system
Permalink
Correct Answer: Option C — Endocrine system
Explanation: The endocrine system consists of glands that secrete hormones directly into the bloodstream to regulate processes such as growth, metabolism, and reproduction. Key glands include the pituitary, thyroid, adrenal glands, and pancreas.
Submitted by: PaperMCQs
6
Easy pms Uploaded: 06 Aug 2026

Photosynthesis primarily occurs in which part of a plant cell?

  • A Chloroplast
  • B Mitochondria
  • C Nucleus
  • D Vacuole
Permalink
Correct Answer: Option A — Chloroplast
Explanation: Chloroplasts contain chlorophyll, the green pigment that captures sunlight energy to convert carbon dioxide and water into glucose and oxygen. This process sustains plant growth and supplies oxygen essential for most life on Earth.
Submitted by: PaperMCQs
7
Easy ppsc nts Uploaded: 14 Jul 2026

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

  • A Migration
  • B Hibernation
  • C Aestivation
  • D Dormancy
Permalink
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
8
Easy pms Uploaded: 06 Aug 2026

Which system in the human body is responsible for movement and support?

  • A Digestive system
  • B Circulatory system
  • C Nervous system
  • D Skeletal and muscular system
Permalink
Correct Answer: Option D — Skeletal and muscular system
Explanation: The skeletal and muscular systems work together to provide structural support, protect internal organs, and enable body movement. Bones give the body its framework while muscles contract to produce coordinated motion at various joints.
Submitted by: PaperMCQs
9
Easy pms Uploaded: 06 Aug 2026

The human heart has how many chambers?

  • A Four
  • B Two
  • C Three
  • D Five
Permalink
Correct Answer: Option A — Four
Explanation: The human heart contains four chambers: two atria and two ventricles. This structure allows separation of oxygenated and deoxygenated blood, enabling efficient double circulation between the lungs and the rest of the body.
Submitted by: PaperMCQs
10
Easy fpsc ppsc nts Uploaded: 14 Jul 2026

What is the term for the sequence of feeding relationships in an ecosystem?

  • A Pyramid of numbers
  • B Ecological niche
  • C Trophic level
  • D Food chain
Permalink
Correct Answer: Option D — Food chain
Explanation: A food chain is a linear sequence showing how energy and nutrients are transferred from one organism to another through feeding relationships starting from producers.
Submitted by: PaperMCQs
11
Easy ppsc Uploaded: 06 Aug 2026

Which structure allows gas exchange in plant leaves?

  • A Xylem
  • B Phloem
  • C Cuticle
  • D Stomata
Permalink
Correct Answer: Option D — Stomata
Explanation: Stomata are tiny pores primarily located on the underside of leaves that regulate gas exchange, allowing carbon dioxide to enter for photosynthesis and oxygen and water vapor to exit through controlled opening and closing.
Submitted by: PaperMCQs
12
Easy fpsc ppsc nts Uploaded: 14 Jul 2026

What is the process by which cells divide to produce two identical daughter cells?

  • A Meiosis
  • B Binary fission
  • C Mitosis
  • D Budding
Permalink
Correct Answer: Option C — Mitosis
Explanation: Mitosis is the type of cell division that produces two genetically identical daughter cells from a single parent cell and is responsible for growth tissue repair and asexual reproduction.
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13
Easy css Uploaded: 06 Aug 2026

What is the term for an organism's habitat and role within an ecosystem?

  • A Habitat
  • B Niche
  • C Population
  • D Biome
Permalink
Correct Answer: Option B — Niche
Explanation: An ecological niche describes the specific role an organism plays in its environment, including resource use, interactions with other species, and habitat requirements. No two species can occupy the exact same niche indefinitely.
Submitted by: PaperMCQs
14
Easy ppsc nts Uploaded: 14 Jul 2026

Which organ in the human body is responsible for pumping blood throughout the body?

  • A Heart
  • B Lungs
  • C Liver
  • D Kidney
Permalink
Correct Answer: Option A — Heart
Explanation: The heart is a muscular organ that pumps blood throughout the body via the circulatory system supplying oxygen and nutrients to tissues and removing waste products.
Submitted by: PaperMCQs
15
Easy nts Uploaded: 06 Aug 2026

What is the term for the outer covering that protects plant cells and provides rigidity?

  • A Cell membrane
  • B Cytoplasm
  • C Cell wall
  • D Nucleus
Permalink
Correct Answer: Option C — Cell wall
Explanation: The cell wall, composed mainly of cellulose, surrounds plant cells and provides structural support, protection, and rigidity. Unlike the flexible cell membrane, the wall maintains the plant's overall shape and prevents excessive water uptake.
Submitted by: PaperMCQs
16
Easy fpsc Uploaded: 06 Aug 2026

Which human chromosome pair determines biological sex?

  • A 1st pair
  • B 23rd pair
  • C 10th pair
  • D 22nd pair
Permalink
Correct Answer: Option B — 23rd pair
Explanation: Humans have 23 pairs of chromosomes, and the 23rd pair determines biological sex. Females typically have two X chromosomes while males have one X and one Y chromosome, inherited from their respective parents.
Submitted by: PaperMCQs
17
Easy ppsc Uploaded: 06 Aug 2026

Which scientist is credited with discovering the cell using a microscope?

  • A Robert Hooke
  • B Charles Darwin
  • C Gregor Mendel
  • D Louis Pasteur
Permalink
Correct Answer: Option A — Robert Hooke
Explanation: Robert Hooke first observed and named cells in 1665 while examining thin slices of cork under a microscope. His observations laid early groundwork for the eventual development of comprehensive cell theory in biology.
Submitted by: PaperMCQs
18
Easy fpsc ppsc nts Uploaded: 14 Jul 2026

Which pigment in plants absorbs sunlight for photosynthesis?

  • A Chlorophyll
  • B Melanin
  • C Haemoglobin
  • D Keratin
Permalink
Correct Answer: Option A — Chlorophyll
Explanation: Chlorophyll is the green pigment found in chloroplasts of plant cells that absorbs sunlight primarily in the red and blue wavelengths to drive the process of photosynthesis.
Submitted by: PaperMCQs
19
Easy fpsc ppsc nts Uploaded: 14 Jul 2026

Which type of reproduction in bacteria involves the cell splitting into two equal daughter cells?

  • A Budding
  • B Binary fission
  • C Fragmentation
  • D Sporulation
Permalink
Correct Answer: Option B — Binary fission
Explanation: Binary fission is the primary method of asexual reproduction in bacteria where a single cell replicates its DNA and divides into two genetically identical daughter cells.
Submitted by: PaperMCQs
20
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
Permalink
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
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