Most Repeated AFNS Biology MCQs | Past Experiences
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AFNS Biology MCQs with Answers
Q1. Which of these major bioelements is in the highest percentage in protoplasm?
A. Carbon
B. Hydrogen
C. Oxygen
D. Nitrogen
Correct Answer: C
Q2. A scientific theory has which of the following properties?
A. It agrees with available evidence
B. It cannot be rejected
C. It has been absolutely proven
D. It does not need to be altered in the light of new evidence
Correct Answer: A
Q3. Data analysis is necessary to prove or disprove a hypothesis by:
A. Collection
B. Experimentation
C. Alteration
D. Formulation
Correct Answer: B
Q4. Which one of the following is a correct sequence in the biological method?
A. Observations, Hypothesis, Law, Theory
B. Hypothesis, Observations, Law, Theory
C. Observations, Hypothesis, Deduction, Experimentation
D. Law, Theory, Deduction, Observations
Correct Answer: C
Q5. Classification means the grouping of organisms on the basis of:
A. How they feed
B. The features they have in common
C. How they respire
D. How they can survive
Correct Answer: B
Q6. A related group of genera comprises:
A. An order
B. A family
C. A class
D. A phylum
Correct Answer: B
Q7. The cutting down of trees for the conversion of a forest to non-forest land is called:
A. Destruction
B. Agrarianism
C. Deforestation
D. Degradation
Correct Answer: C
Q8. The plasma membrane does all of these except:
A. Contains the hereditary material
B. Acts as a boundary or border for the cytoplasm
C. Regulates passage of material in and out of the cell
D. Functions in the recognition of cell
Correct Answer: A
Q9. The thin extensions of the inner mitochondrial membrane are known as:
A. Cristae
B. Matrix
C. Thylakoids
D. Stroma
Correct Answer: A
Q10. Which tissue is responsible for the conduction of dissolved organic matter (food) between different parts of the plant body?
A. Xylem tissue
B. Phloem tissue
C. Compound tissue
D. Fibre tissue
Correct Answer: B
Q11. How many major categories of tissues are in plants?
A. Two
B. Three
C. Five
D. More than five
Correct Answer: A
Q12. What is called the movement of water across a semi-permeable membrane?
A. Facilitation
B. Concentration
C. Diffusion
D. Osmosis
Correct Answer: D
Q13. Which of these cellular organelles have their own DNA?
A. Chloroplast
B. Nucleus
C. Mitochondrion
D. All of these
Correct Answer: D
Q14. Which of the following stages of cell division is very different for animal and plant cells?
A. Metaphase
B. Anaphase
C. Telophase
D. Cytokinesis
Correct Answer: D
Q15. In which stage of the cell cycle do most cells spend their lives?
A. Prophase
B. Metaphase
C. Interphase
D. Telophase
Correct Answer: C
Q16. The most basic characteristic of life is:
A. Cell cycle
B. Reproduction
C. Replication
D. Inflammation
Correct Answer: B
Q17. Normally, the genetic material in the nucleus is in a loose thread-like form called:
A. Chromatin
B. Duplication
C. Mitosis
D. Meiosis
Correct Answer: A
Q18. Some organisms can regenerate parts of their bodies. The production of new cells is achieved by:
A. Replacement
B. Development
C. Regeneration
D. Mitosis
Correct Answer: D
Q19. Which is one of the main types of programmed cell death?
A. Necrosis
B. Cytoskeleton
C. Apoptosis
D. Breakdown
Correct Answer: C
Q20. The process of mitosis ensures that:
A. Each new cell is genetically different from its parent
B. Each new cell receives the proper number of chromosomes
C. Cells will divide at the appropriate time
D. Chromosomes duplicate without errors
Correct Answer: B
Q21. What is called the set of biochemical reactions that occur in living organisms in order to maintain life?
A. Metabolism
B. Anabolism
C. Activation
D. Transformation
Correct Answer: A
Q22. All chemical reactions require activation:
A. Process
B. Synthesis
C. Energy
D. Action
Correct Answer: C
Q23. German physiologist Winflehn Kuhne first used the term enzyme in:
A. 1872
B. 1874
C. 1876
D. 1878
Correct Answer: D
Q24. Every enzyme works at its maximum rate at a specific temperature called the:
A. Optimum temperature
B. Specific temperature
C. Active temperature
D. Maximum temperature
Correct Answer: A
Q25. To what category of molecules do enzymes belong?
A. Carbohydrates
B. Lipids
C. Nucleic acid
D. Proteins
Correct Answer: D
Q26. The study of internal structures is called:
A. Taxonomy
B. Genetics
C. Anatomy
D. Histology
Correct Answer: C
Q27. Biology is the study of:
A. Reaction
B. Life
C. Science
D. Heritance
Correct Answer: B
Q28. Members of the same species living in the same place at the same time make a:
A. Population
B. Biosphere
C. Habitat
D. Community
Correct Answer: A
Q29. A hypothesis must be testable to be scientifically valid. Being testable means that:
A. Some observations could prove the hypothesis
B. Only a controlled experiment can indicate whether the hypothesis is correct or incorrect
C. The hypothesis is proven
D. The opposite of hypothesis is tested and proven wrong
Correct Answer: B
Q30. Science is the systemized knowledge derived from observations and:
A. Deductions
B. Experiments
C. Principles
D. Researches
Correct Answer: B
AFNS Biology MCQs – Past Papers Practice Questions
Q31. Biodiversity is a measure of the variety of organisms present in different:
A. Systems
B. Ecosystems
C. Species
D. Classifications
Correct Answer: B
Q32. Classification is based on relationship amongst organisms and such relationship is got through similarities in:
A. Organisms
B. Species
C. Characteristics
D. Inheritance
Correct Answer: C
Q33. Viruses are not classified in any kingdom because:
A. They are too poorly understood
B. They are too small
C. Their genetics cannot be determined
D. They are not considered living organisms
Correct Answer: D
Q34. When the last member of a particular species dies, the species is said to be:
A. Endangered
B. Established
C. Threatened
D. Extinct
Correct Answer: D
Q35. A light microscope can magnify objects only about:
A. 500 times
B. 1000 times
C. 1500 times
D. 2000 times
Correct Answer: C
Q36. In the history of biology, who were the first who organized the data of natural world?
A. French
B. Greeks
C. Italians
D. Romans
Correct Answer: B
Q37. Name the tiny granular structures that are either floating freely in cytoplasm or are bound to endoplasmic reticulum.
A. Ribosomes
B. Granulars
C. Organelles
D. Prokaryotes
Correct Answer: A
Q38. Prokaryotes possess prokaryotic cells which are much simpler than the:
A. Chromosomal cells
B. Granular cells
C. Eukaryotic cells
D. Structure cells
Correct Answer: C
Q39. Which of these materials is not a component of the plasma membrane?
A. Carbohydrates
B. Proteins
C. Lipids
D. DNA
Correct Answer: D
Q40. The chloroplast functions in:
A. Photosynthesis
B. ATP synthesis
C. DNA replication
D. Protein synthesis
Correct Answer: A
Q41. What is called the series of events from the time a cell is produced until it completes mitosis and produces new cells?
A. Life cycle
B. Metabolism cycle
C. Cell cycle
D. Chromosomal cycle
Correct Answer: C
Q42. In which stage of the cell cycle, each chromosome is duplicated and so it consists of two chromatids?
A. G1
B. G2
C. S
D. M
Correct Answer: C
Q43. The most basic characteristic of life is:
A. Cell cycle
B. Reproduction
C. Replication
D. Inflammation
Correct Answer: B
Q44. Normally, the genetic material in nucleus is in a loose thread like form called:
A. Chromatin
B. Duplication
C. Mitosis
D. Meiosis
Correct Answer: A
Q45. Some organisms can regenerate parts of their bodies. The production of new cells is achieved by:
A. Replacement
B. Development
C. Regeneration
D. Mitosis
Correct Answer: D
Q46. Which is one of the main types of programmed cell death?
A. Necrosis
B. Cytoskeleton
C. Apoptosis
D. Break down
Correct Answer: C
Q47. The process of mitosis ensures that:
A. Each new cell is genetically different from its parent
B. Each new cell receives the proper number of chromosomes
C. Cells will divide at the appropriate time
D. Chromosomes duplicate without errors
Correct Answer: B
Q48. What is called the study of energy transformations in living organisms?
A. Energetics
B. Bioenergetics
C. Photosynthesis
D. Respiration
Correct Answer: B
Q49. The ability of ATP to store and release energy is due to its:
A. Molecular structure
B. Energy structure
C. Nucleus structure
D. Molecular structure
Correct Answer: A
Q50. In which of the following steps of respiration, COâ‚‚ is produced?
A. Glycolysis
B. Krebs cycle
C. Electron transport chain
D. All of these
Correct Answer: B
Free Online Practice Tests of Biology (Matric Level) | AFNS Biology MCQs
Important AFNS Biology MCQs from Past Tests
Q51. In which of the following metabolic processes, oxidation as well as reduction of molecules occur?
A. Photosynthesis
B. Respiration
C. Both
D. None of these
Correct Answer: C
Q52. Which organisms obtain water, carbon dioxide and minerals from their environment and prepare their food which is then used for growth and energy?
A. Autotrophic organisms
B. Heterotrophic organisms
C. All organisms
D. None of these
Correct Answer: A
Q53. The word ‘biology’ has been derived from two Greek words; ‘bios’ meaning ‘life’ and ‘logos’ meaning:
A. Thought
B. Information
C. Organism
D. Function
Correct Answer: A
Q54. Which of the following group includes organisms all of which are absorptive in their nutrition?
A. Protists
B. Animals
C. Bacteria
D. Fungi
Correct Answer: D
Q55. Biologists use reasoning to formulate a:
A. Consideration
B. Hypothesis
C. Deduction
D. Statement
Correct Answer: B
Q56. Experimentation is only a step of the scientific process, but it is very important because it always:
A. Gives the biologist a correct result
B. Allows rejection of some alternative hypotheses
C. Ensures that hypotheses can be confirmed with certainty
D. Gives scientists a chance to work in the laboratory
Correct Answer: B
Q57. Biodiversity found on Earth today is the result of ______ years of evolution.
A. 2 billion
B. 3 billion
C. 4 billion
D. 5 billion
Correct Answer: C
Q58. Over 1.5 million types of animals and over ______ million types of plants are known to biologists.
A. 2.0
B. 1.5
C. 0.5
D. 1.0
Correct Answer: C
Q59. Which country’s biologist Carolus Linnaeus first introduced and adopted the system of binomial nomenclature?
A. England
B. Greece
C. France
D. Sweden
Correct Answer: D
Q60. A certain organism is multicellular, adapted for photosynthesis and has multicellular sex organs. To which kingdom does it belong?
A. Protista
B. Plantae
C. Fungi
D. Animalia
Correct Answer: B
Q61. Two important terms are used in microscopy; i.e. magnification and:
A. Resolution
B. Measurement
C. Observation
D. Clarification
Correct Answer: A
Q62. Who presented the idea that all animals and plants are somehow related?
A. Robert Hooke
B. Leeuwenhoek
C. Aristotle
D. T. Schwann
Correct Answer: C
Q63. The ______ is the membrane enclosed structure in eukaryotic cells that contains the DNA of the cell.
A. Nucleolus
B. Nucleus
C. Chloroplast
D. Mitochondrion
Correct Answer: B
Q64. Cell cycle consists of two major phases; i.e. interphase and:
A. Mitotic phase
B. Anaphase
C. Metaphase
D. Telophase
Correct Answer: A
Q65. In the burning process of fuel, which gas is used to break the C-H bonds present in fuel molecules?
A. Oxygen
B. Nitrogen
C. Hydrogen
D. Helium
Correct Answer: A
Q66. Oxygen takes part in aerobic respiration in:
A. Glycolysis
B. Link step between glycolysis and Krebs cycle
C. Krebs cycle
D. Electron transport chain
Correct Answer: D
Q67. The nutrients which are required in large quantities are called:
A. Macronutrients
B. Micronutrients
C. Active nutrients
D. Biomutrients
Correct Answer: A
Q68. The lipids present in food are composed of fatty acids bonded to:
A. Glucose
B. Cholesterol
C. Glycerol
D. Carbohydrates
Correct Answer: C
Q69. Which is the largest gland of human body?
A. Liver
B. Gallbladder
C. Pancreas
D. Spleen
Correct Answer: A
Q70. What are the primary nutrients that provide quick usable energy to body?
A. Carbohydrates
B. Proteins
C. Lipids
D. Nucleic acids
Correct Answer: A
Q71. In stomach, pepsinogen is converted into:
A. Pepsin
B. Bicarbonate
C. HCl
D. Gastrin
Correct Answer: A
Q72. In most plants, food is manufactured in leaves by:
A. Anabolism
B. Metabolism
C. Hydration
D. Photosynthesis
Correct Answer: D
Q73. Name a molecule that can stimulate an immune response.
A. Glycolygen
B. Antigen
C. Platelet
D. Leukocyte
Correct Answer: B
Q74. In most plants, food is transported in the form of:
A. Glucose
B. Sucrose
C. Starch
D. Proteins
Correct Answer: B
Q75. In which of the following chambers has the thickest wall in human heart?
A. Right atrium
B. Left atrium
C. Left ventricle
D. Right ventricle
Correct Answer: C
AFNS Biology MCQs for Female Candidates
Q76. The study of genes and their roles in inheritance is called:
A. Histology
B. Biology
C. Genetics
D. Morphology
Correct Answer: C
Q77. Which branch of biology deals with the study of biological processes using mathematical techniques and tools?
A. Biomathematics
B. Biogeography
C. Biophysics
D. Biochemistry
Correct Answer: A
Q78. If a scientist is studying the methods of inserting human insulin gene in bacteria, which branch of biology may this be?
A. Anatomy
B. Physiology
C. Biotechnology
D. Pharmacology
Correct Answer: C
Q79. The freezing point of water is 0°C and the boiling point is:
A. 98°C
B. 99°C
C. 100°C
D. 105°C
Correct Answer: C
Q80. The hypotheses that stand the test of time are called:
A. Deductions
B. Principles
C. Results
D. Theories
Correct Answer: D
Q81. All organisms are divided into how many kingdoms?
A. Two
B. Three
C. Four
D. Five
Correct Answer: D
Q82. Viruses are assigned to the kingdom:
A. Monera
B. Protista
C. Fungi
D. None of the above
Correct Answer: D
Q83. Cells were first described by a British scientist, Robert Hooke in:
A. 1655
B. 1660
C. 1665
D. 1670
Correct Answer: C
Q84. Chromosomes are composed of deoxyribonucleic acid and:
A. Lipids
B. Proteins
C. Organelles
D. Fats
Correct Answer: B
Q85. Rough endoplasmic reticulum is the area in a cell where ______ are synthesized.
A. Polysaccharides
B. Lipids
C. Proteins
D. DNA
Correct Answer: C
Q86. When a German biologist Walther Flemming observed that in a dividing cell, nucleus passes through a series of changes which he called mitosis?
A. 1860s
B. 1870s
C. 1880s
D. 1890s
Correct Answer: B
Q87. Which event distinguishes meiosis from mitosis?
A. Condensation of chromosomes
B. Loss of the nuclear membrane
C. Formation of metaphase plate
D. Pairing of homologous chromosomes
Correct Answer: D
Q88. The activation energy is defined as minimum energy required to start:
A. Reaction
B. Process
C. Mechanism
D. Production
Correct Answer: A
Q89. What is true about enzymes?
A. They make biochemical reactions to proceed spontaneously
B. They lower the activation energy
C. They are not very specific in their choice of substrates
D. They are needed in large quantities
Correct Answer: B
Q90. The loss of electrons is called oxidation while the gain of electrons is called:
A. Reduction
B. Transformation
C. Reproduction
D. Acquisition
Correct Answer: A
Q91. Name the anabolic process and is an important component of biomolecules in living systems.
A. Diffusion
B. Hydrogenation
C. Photosynthesis
D. Oxidation
Correct Answer: C
Q92. From which bonds of ATP molecule, energy is taken?
A. P-P bonds
B. C-H bonds
C. C-N bonds
D. C-O bonds
Correct Answer: A
Q93. Plants get nitrogen in the form of:
A. Sulphides
B. Carbons
C. Oxides
D. Nitrates
Correct Answer: D
Q94. Ulcers occur in:
A. Stomach
B. Duodenum
C. Esophagus
D. All of these
Correct Answer: D
Q95. Bile from liver helps in the digestion of lipids through:
A. Absorption
B. Digestion
C. Emulsification
D. Peristalsis
Correct Answer: C
Q96. All land plants have developed complex ______ tissues that move water and food throughout plant body.
A. Vascular
B. Xylem
C. Phloem
D. Vital
Correct Answer: A
Q97. In which respiration, oxygen is used and there is complete oxidation of the food material?
A. Aerobic respiration
B. Anaerobic respiration
C. Gaseous respiration
D. Cellular respiration
Correct Answer: A
Q98. Where does the gaseous exchange occur in humans?
A. Pharynx
B. Trachea
C. Bronchi
D. Alveoli
Correct Answer: D
Q99. Which is defined as the maintenance of the internal conditions of body at equilibrium?
A. Osmoregulation
B. Oxidation
C. Homeostasis
D. Metabolism
Correct Answer: C
Q100. Kidneys are bean-shaped organs coloring:
A. Dark-red
B. Light-red
C. Light-crimson
D. Dark-crimson
Correct Answer: A
Free Online Practice of AFNSN Biology MCQs (Intermediate Level)
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