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Biology MCQs

93 Questions Subject Test
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1
Medium fpsc ppsc nts Uploaded: 14 Jul 2026

What is the term for the symbiotic relationship where one organism benefits and the other is harmed?

  • A Mutualism
  • B Commensalism
  • C Amensalism
  • D Parasitism
Permalink
Correct Answer: Option D — Parasitism
Explanation: Parasitism is a symbiotic relationship where one organism the parasite benefits at the expense of the other the host causing it harm such as tapeworms in the intestines.
Submitted by: PaperMCQs
2
Hard nts Uploaded: 06 Aug 2026

What is the term for a population of organisms of the same species living in a specific area?

  • A Community
  • B Population
  • C Ecosystem
  • D Biome
Permalink
Correct Answer: Option B — Population
Explanation: A population refers to a group of individuals belonging to the same species that live in a specific geographic area and can interbreed. Population studies help scientists understand growth patterns, density, and species survival dynamics.
Submitted by: PaperMCQs
3
Medium fpsc ppsc nts Uploaded: 14 Jul 2026

Which blood group is known as the universal recipient?

  • A O negative
  • B AB positive
  • C A positive
  • D B positive
Permalink
Correct Answer: Option B — AB positive
Explanation: AB positive blood group is the universal recipient because individuals with this blood type can receive blood from donors of any ABO and Rh blood group.
Submitted by: PaperMCQs
4
Medium fpsc ppsc nts Uploaded: 05 Aug 2026

Which type of plant reproduction involves new plants growing from cuttings runners or bulbs?

  • A Pollination
  • B Fertilisation
  • C Seed dispersal
  • D Vegetative propagation
Permalink
Correct Answer: Option D — Vegetative propagation
Explanation: Vegetative propagation is a form of asexual reproduction where new plants grow from vegetative parts such as cuttings runners bulbs or tubers without the need for seeds or flowers.
Submitted by: PaperMCQs
5
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
6
Medium fpsc ppsc nts Uploaded: 14 Jul 2026

What is the scientific name for the study of classification of organisms?

  • A Morphology
  • B Ecology
  • C Taxonomy
  • D Physiology
Permalink
Correct Answer: Option C — Taxonomy
Explanation: Taxonomy is the branch of biology dealing with the classification identification and naming of organisms into a hierarchical system of kingdoms phyla classes orders families genera and species.
Submitted by: PaperMCQs
7
Medium fpsc ppsc nts Uploaded: 14 Jul 2026

Which part of the brain controls vital involuntary functions such as breathing heart rate and blood pressure?

  • A Cerebrum
  • B Cerebellum
  • C Thalamus
  • D Medulla oblongata
Permalink
Correct Answer: Option D — Medulla oblongata
Explanation: The medulla oblongata located in the brainstem regulates vital involuntary functions including breathing heart rate blood pressure and reflexes essential for survival.
Submitted by: PaperMCQs
8
Medium fpsc ppsc nts Uploaded: 14 Jul 2026

What is the term for all the populations of different species living and interacting in the same area?

  • A Community
  • B Population
  • C Biosphere
  • D Ecosystem
Permalink
Correct Answer: Option A — Community
Explanation: A community is an assemblage of populations of different species that live and interact in the same geographical area at a given time sharing resources and affecting each other.
Submitted by: PaperMCQs
9
Medium fpsc ppsc nts Uploaded: 14 Jul 2026

Who discovered the double helix structure of DNA?

  • A Charles Darwin and Gregor Mendel
  • B Robert Hooke and Anton van Leeuwenhoek
  • C James Watson and Francis Crick
  • D Louis Pasteur and Robert Koch
Permalink
Correct Answer: Option C — James Watson and Francis Crick
Explanation: James Watson and Francis Crick discovered the double helix structure of DNA in 1953 using X-ray diffraction data from Rosalind Franklin and Maurice Wilkins.
Submitted by: PaperMCQs
10
Hard nts Uploaded: 06 Aug 2026

What is the term for an organism's observable physical characteristics?

  • A Genotype
  • B Karyotype
  • C Phenotype
  • D Chromatype
Permalink
Correct Answer: Option C — Phenotype
Explanation: Phenotype refers to the observable physical, biochemical, and behavioral traits of an organism, resulting from the interaction between its genetic makeup and environmental influences. Examples include height, eye color, and blood type.
Submitted by: PaperMCQs
11
Medium fpsc ppsc nts Uploaded: 14 Jul 2026

What is the term for a substance that triggers an immune response in the body?

  • A Antibody
  • B Enzyme
  • C Antigen
  • D Hormone
Permalink
Correct Answer: Option C — Antigen
Explanation: An antigen is any substance usually a protein on the surface of a pathogen that is recognised as foreign by the immune system and triggers the production of specific antibodies.
Submitted by: PaperMCQs
12
Medium nts Uploaded: 06 Aug 2026

Which process allows gases to move in and out of cells without using energy?

  • A Active transport
  • B Diffusion
  • C Endocytosis
  • D Exocytosis
Permalink
Correct Answer: Option B — Diffusion
Explanation: Diffusion is the passive movement of molecules such as oxygen and carbon dioxide from an area of higher concentration to lower concentration across cell membranes, requiring no cellular energy expenditure to occur naturally.
Submitted by: PaperMCQs
13
Medium fpsc ppsc nts Uploaded: 14 Jul 2026

What is the function of the Golgi apparatus in a cell?

  • A Energy production
  • B Protein synthesis
  • C DNA replication
  • D Modifying packaging and dispatching proteins
Permalink
Correct Answer: Option D — Modifying packaging and dispatching proteins
Explanation: The Golgi apparatus modifies sorts and packages proteins and lipids received from the endoplasmic reticulum and dispatches them to their correct destinations inside or outside the cell.
Submitted by: PaperMCQs
14
Medium fpsc ppsc nts Uploaded: 05 Aug 2026

What is the term for organisms that maintain a stable internal environment despite external changes?

  • A Homeostasis
  • B Adaptation
  • C Metabolism
  • D Evolution
Permalink
Correct Answer: Option A — Homeostasis
Explanation: Homeostasis is the ability of living organisms to maintain stable internal conditions such as body temperature blood glucose and pH despite changes in the external environment.
Submitted by: PaperMCQs
15
Medium fpsc ppsc nts Uploaded: 14 Jul 2026

Which type of tissue in plants transports water and minerals from roots to leaves?

  • A Phloem
  • B Cambium
  • C Epidermis
  • D Xylem
Permalink
Correct Answer: Option D — Xylem
Explanation: Xylem is the vascular tissue in plants that transports water and dissolved minerals from the roots upward through the stem to the leaves through a process driven by transpiration.
Submitted by: PaperMCQs
16
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
17
Medium nts Uploaded: 06 Aug 2026

Which layer of skin contains sweat glands, hair follicles, and blood vessels?

  • A Epidermis
  • B Dermis
  • C Hypodermis
  • D Subcutis
Permalink
Correct Answer: Option B — Dermis
Explanation: The dermis, located beneath the epidermis, houses structures including sweat glands, hair follicles, blood vessels, and nerve endings. It provides strength, elasticity, and support to the skin while regulating body temperature and sensation.
Submitted by: PaperMCQs
18
Medium fpsc ppsc nts Uploaded: 14 Jul 2026

Which disease is caused by the deficiency of Vitamin B1 affecting the nervous and cardiovascular systems?

  • A Beriberi
  • B Scurvy
  • C Pellagra
  • D Rickets
Permalink
Correct Answer: Option A — Beriberi
Explanation: Beriberi is caused by Vitamin B1 or thiamine deficiency and affects the nervous and cardiovascular systems causing muscle weakness nerve damage and heart problems.
Submitted by: PaperMCQs
19
Medium nts Uploaded: 06 Aug 2026

What is the term for the region of a chromosome where sister chromatids join?

  • A Telomere
  • B Chromatid
  • C Centromere
  • D Nucleosome
Permalink
Correct Answer: Option C — Centromere
Explanation: The centromere is the constricted region of a chromosome where two sister chromatids are joined together. It plays a crucial role during cell division by serving as the attachment point for spindle fibers.
Submitted by: PaperMCQs
20
Medium fpsc ppsc nts Uploaded: 14 Jul 2026

What is the term for organisms that cannot make their own food and must consume other organisms?

  • A Autotrophs
  • B Heterotrophs
  • C Producers
  • D Chemotrophs
Permalink
Correct Answer: Option B — Heterotrophs
Explanation: Heterotrophs are organisms that cannot synthesise their own food and must obtain energy and organic nutrients by consuming other organisms and include animals fungi and most bacteria.
Submitted by: PaperMCQs
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