How to Prepare AFNS Biology Past MCQs for High Score
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AFNS Biology Past MCQs with Answers for PDF Download
Q. What is called the process of breaking up complex substances into simpler substances?
A. Anaesthesia
B. Ingestion
C. Absorption
D. Assimilation
Correct Answer: D
Q. During swallowing, bolus is pushed to the back of mouth by:
A. Epiglottis
B. Teeth
C. Tongue
D. Trachea
Correct Answer: C
Q. Which food group is our body’s best source of energy?
A. Proteins
B. Carbohydrates
C. Fats
D. Vitamins
Correct Answer: B
Q. Which branch deals with the study of form and structures of living organisms?
A. Cell biology
B. Physiology
C. Morphology
D. Histology
Correct Answer: C
Q. There are three major divisions of biology which study the different aspects of the lives of the major groups of organisms: zoology, botany and:
A. Microbiology
B. Embryology
C. Taxonomy
D. Genetics
Correct Answer: A
Q. Which of these tissues also make the glandular tissue in animals?
A. Epithelial tissue
B. Muscular tissue
C. Connective tissue
D. Nervous tissue
Correct Answer: A
Q. Biological method has played an important part in scientific research for almost:
A. 100 years
B. 200 years
C. 400 years
D. 500 years
Correct Answer: D
Q. At which point is a biologist most likely to use reasoning?
A. While taking observations
B. During hypothesis formulation
C. During data organization
D. None of these
Correct Answer: B
Q. Which of these is the basic unit of classification?
A. Phylum
B. Class
C. Order
D. Species
Correct Answer: D
Q. In binomial nomenclature, whose first letter of the name is capitalized?
A. Genus
B. Family
C. Class
D. Species
Correct Answer: A
Q. Biologists use two types of electron microscopes; Transmission Electron Microscope and:
A. Object Electron Microscope
B. Specific Electron Microscope
C. Specimen Electron Microscope
D. Scanning Electron Microscope
Correct Answer: D
Q. Animals and many unicellular organisms have hollow and cylindrical organelles known as:
A. Centrosomes
B. Vacuoles
C. Centrioles
D. Organelles
Correct Answer: C
Q. Ribosomes are constructed in the:
A. Nucleolus
B. Nucleoid
C. Nuclear pore
D. Endoplasmic reticulum
Correct Answer: A
Q. During which phase of mitosis are spindles formed?
A. Prophase
B. G2
C. Interphase
D. Metaphase
Correct Answer: A
Q. Enzymes are proteins that catalyze biochemical reactions and are not changed during the:
A. Metabolism
B. Reaction
C. Catabolism
D. Activation
Correct Answer: B
Q. Which energy is stored in chemical bonds and is released as kinetic energy when these bonds break?
A. Chemical energy
B. Kinetic energy
C. Potential energy
D. Substantial energy
Correct Answer: C
Q. Photosynthesis is the synthesis of glucose from carbon dioxide and water in the presence of sunlight and:
A. Heat
B. Chlorophyll
C. Oxygen
D. Soil
Correct Answer: B
Q. According to World Health Organization, % of diseases in the world is caused by polluted water:
A. 70%
B. 80%
C. 90%
D. 95%
Correct Answer: B
Q. Which gas is used for refining sugar in sugar mills?
A. Carbon monoxide
B. Carbon dioxide
C. Nitrogen gas
D. Hydrogen peroxide
Correct Answer: B
Q. What is the % of hydrogen and oxygen when water dissociates at 2000°C?
A. 0.001%
B. 0.1%
C. 0.009%
D. 0.09%
Correct Answer: B
Q. Lead pencils are made by mixing graphite with clay in the %age of:
A. 20% to 80%
B. 20% to 85%
C. 20% to 60%
D. 20% to 90%
Correct Answer: A
Q. Which one is the composition of nitric acid and HCl (in aqua regia)?
A. 3:1
B. 1:3
C. 1:2
D. 2:1
Correct Answer: B
Q. Which one is the boiling point of H₂SO₄?
A. 738°C
B. 338°C
C. 838°C
D. 238°C
Correct Answer: B
Q. Which one is the color of bleaching powder?
A. White powder
B. Yellowish white powder
C. Bright yellow
D. Pale yellow
Correct Answer: B
Q. Bauxite contains impurities like:
A. Ferric oxide, silica and titanium oxide
B. Potassium oxide, aluminum oxide
C. Sodium oxide and ferric oxide
D. Titanium oxide and aluminum oxide
Correct Answer: A
Free online Practice of AFNS Biology Past MCQs
Q. Chromatin is a complex material, made of DNA and:
A. RNA
B. Nucleosomes
C. Chromosomes
D. Proteins
Correct Answer: D
Q. When in the heterozygous condition, one allele masks or prevents the expression of the other, it is called the:
A. Dominant allele
B. Identical allele
C. Expressed allele
D. Alternate allele
Correct Answer: A
Q. An organism’s expressed physical trait, such as seed colour or pod shape is called its:
A. Genotype
B. Phenotype
C. Karyotype
D. Physical type
Correct Answer: B
Q. The nose encloses the nasal cavity. It opens to the outside through the openings called the:
A. Nostrils
B. Pharynx
C. Nasals
D. Bronchi
Correct Answer: A
Q. Most of the gaseous exchange in a leaf occurs through:
A. Stomata
B. General surface
C. Cuticle
D. Lenticels
Correct Answer: A
Q. The plants obtain water from soil and it is also produced in the body during:
A. Internal respiration
B. Blood respiration
C. Cellular respiration
D. Gaseous respiration
Correct Answer: C
Q. Which organ is responsible for filtering the blood?
A. Intestine
B. Brain
C. Stomach
D. Kidney
Correct Answer: D
Q. Which would not be present in the filtrate entering the Bowman capsule of nephron?
A. Water
B. Calcium ions
C. Blood cells
D. Urea
Correct Answer: C
Q. There are two types of coordination in organisms; nervous coordination and:
A. Chemical coordination
B. Stimuli coordination
C. Formal coordination
D. Effective coordination
Correct Answer: A
Q. A coordinated action has how many components?
A. Two
B. Three
C. Four
D. Five
Correct Answer: D
Q. The portion of the nervous system that is involuntary in action:
A. Somatic nervous system
B. Motor nervous system
C. Autonomic nervous system
D. Sensory nervous system
Correct Answer: C
Q. Insulin and glucagon are produced in the:
A. Hypothalamus
B. Anterior pituitary
C. Liver
D. Pancreas
Correct Answer: D
Q. The human skeleton is made of bony framework but in certain parts, the framework is supplemented by:
A. Cartilage
B. Tendons
C. Ligaments
D. All of these
Correct Answer: A
Q. Name the location at which two or more bones make contact.
A. Ligament
B. Joint
C. Tissue
D. Tendon
Correct Answer: B
Q. The purpose of rib cage is to:
A. Protect the stomach
B. Protect the spinal cord
C. Protect the heart and lungs
D. Provide an object to which the lungs can attach
Correct Answer: C
Q. Which is the most common and simplest method of asexual reproduction?
A. Binary fission
B. Parthenogenesis
C. Budding
D. Fragmentation
Correct Answer: A
Q. Ovule becomes seed and ovary changes into:
A. Fruit
B. Sepal
C. Style
D. Stigma
Correct Answer: A
Q. Rhizopus reproduces asexually by:
A. Binary fission
B. Budding
C. Spore formation
D. Endospore formation
Correct Answer: C
Q. Which of these cells has haploid number of chromosomes?
A. Spermatogonium
B. Primary spermatocyte
C. Secondary spermatocyte
D. Spermatid
Correct Answer: D
Q. Mendel’s primary contribution to our understanding of inheritance was:
A. The idea that genes are found on chromosomes
B. Explanation of the patterns of inheritance
C. The discovery of alleles
D. Determining that information contained in DNA is for protein synthesis
Correct Answer: B
Q. In ______, the levels of organization range from organism to biosphere.
A. Ecology
B. Biodiversity
C. Demography
D. Geography
Correct Answer: A
Q. The materials flow from one trophic level to the next by means of food chains and food:
A. Formations
B. Pyramids
C. Materials
D. Webs
Correct Answer: D
Q. All the alveoli on one side constitute a:
A. Kidney
B. Spleen
C. Lung
D. Liver
Correct Answer: C
Q. Tobacco smoke contains over ______ different chemicals.
A. 1000
B. 2000
C. 3000
D. 4000
Correct Answer: D
Q. The tube between kidney and urinary bladder is the:
A. Ureter
B. Urethra
C. Renal tubule
D. Nephron
Correct Answer: A
Most Repeated AFNS Biology Past MCQs for Initial Test
Q. During peritoneal dialysis, the waste materials move from:
A. The abdomen to the dialysis fluid
B. The dialysis tube to the peritoneum blood vessels
C. The peritoneum blood vessels to the dialysis fluid
D. The dialysis fluid to the abdomen
Correct Answer: C
Q. Certain factors like light, touch etc. can bring about responses in living organisms. What are called these factors?
A. Receptors
B. Stimuli
C. Coordinators
D. Effectors
Correct Answer: B
Q. How many regions in the brain of human and other vertebrates are?
A. Two
B. Three
C. Four
D. Five
Correct Answer: B
Q. External ear consists of pinna, auditory canal and:
A. Ear drum
B. Stapes
C. Malleus
D. Incus
Correct Answer: A
Q. Which neurons are present inside the central nervous system?
A. Sensory neurons only
B. Motor neurons only
C. Sensory and motor neurons both
D. Interneurons only
Correct Answer: D
Q. The organisms with greater sizes need support to keep their body mass:
A. Intact
B. As one unit
C. Warm
D. Normal
Correct Answer: B
Q. How many bones are there in the adult human skeleton?
A. 200
B. 204
C. 206
D. 208
Correct Answer: C
Q. The disorders in which there is an accumulation of the uric acid in joints:
A. Gout
B. Rheumatoid arthritis
C. Osteoporosis
D. Osteoarthritis
Correct Answer: A
Q. In fragmentation, as certain worms grow to full size, they spontaneously break up into:
A. 1 or 2 pieces
B. 3 or 4 pieces
C. 5 or 6 pieces
D. 8 or 9 pieces
Correct Answer: D
Q. In the life cycle of plants, two different generations alternate with each other; saprophyte generation and:
A. Alternate generation
B. Gametophyte generation
C. Mitotic generation
D. Reproductive generation
Correct Answer: B
Q. A corn develops into new garlic plant. This is the process of:
A. Vegetative propagation
B. Regeneration
C. Budding
D. Fragmentation
Correct Answer: A
Q. What is called the transmission of characteristics from parents to offspring?
A. Inheritance
B. Genetics
C. Taxonomy
D. Trait
Correct Answer: A
Q. When Charles Darwin proposed the mechanism of organic evolution?
A. 1818
B. 1828
C. 1838
D. 1848
Correct Answer: C
Q. An organism has two different alleles for a single trait. Its genotype is said to be:
A. Homozygous
B. Heterozygous
C. Hemizygous
D. Homologous
Correct Answer: B
Q. The self-sufficient unit of an environment that is formed as a result of interactions between its biotic community and the abiotic components is known as:
A. Biosphere
B. Community
C. Ecosystem
D. Population
Correct Answer: C
Q. In which type of symbiotic interaction, species get benefit and neither is harmed?
A. Mutualism
B. Commensalism
C. Parasitism
D. None of these
Correct Answer: A
Q. Identify the correctly matched pair:
A. Rainfall – biotic factor in ecosystem
B. Global warming – formation of fossil fuels
C. Renewable natural resource – air
D. Corn – secondary consumer
Correct Answer: C
Q. How many bronchi are there in the air passage?
A. One
B. Two
C. Many
D. None
Correct Answer: B
Q. In plants, which gas is produced in mesophyll cells only during daytime?
A. Oxygen
B. Carbon dioxide
C. Nitrogen
D. Hydrogen
Correct Answer: A
Q. The longitudinal section of the kidney shows two regions; renal cortex and:
A. Papillary medulla
B. Renal medulla
C. Distal medulla
D. Renal pelvis
Correct Answer: B
Q. Body balance of water, salts, temperature and glucose is termed as:
A. Excretion
B. Tubular secretion
C. Homeostasis
D. Reabsorption
Correct Answer: C
Q. Which is the unit of the nervous system?
A. Axon
B. Neuron
C. Medulla
D. Node
Correct Answer: B
Q. Testes and ovaries are the male and female reproductive organs, i.e.:
A. Testosterone
B. Progesterone
C. Estrogen
D. Gonads
Correct Answer: D
Q. If you look at an intact human brain, what you see the most is a large, highly convoluted outer surface. This is the:
A. Cerebrum
B. Cerebellum
C. Pons
D. Medulla oblongata
Correct Answer: A
Q. The big functions of skeletal system are protection, support and:
A. Reproduction
B. Meditation
C. Movements
D. Excretion
Correct Answer: C
AFNS Biology Past MCQs Solved
Q. Which is the longest bone in the human body?
A. Vertebral bone
B. Arm bone
C. Pelvic bone
D. Thigh bone
Correct Answer: D
Q. How many bones make our skull?
A. 24
B. 22
C. 14
D. 26
Correct Answer: B
Q. Sexual reproduction involves the joining of male and female sex cells, i.e.:
A. Gametes
B. Gonads
C. Testosterone
D. Progesterone
Correct Answer: A
Q. Cross pollination is the transfer of pollen grains from the flower on one plant to the flower on other plant of the same:
A. Class
B. Species
C. Phylum
D. Order
Correct Answer: B
Q. Which part of the female reproduction system receives egg cells from the ovary?
A. Fallopian tube
B. Uterus
C. Vagina
D. Cervix
Correct Answer: A
Q. DNA wraps around histone proteins and forms round structures, called:
A. Chromatins
B. Nucleosomes
C. Centrosomes
D. Chromosomes
Correct Answer: B
Q. The specific combination of genes in an individual is known as:
A. Phenotype
B. Karyotype
C. Homotype
D. Genotype
Correct Answer: D
Q. Which of the following statements regarding genes is false?
A. Genes are located on chromosomes
B. Genes consist of a long sequence of DNA
C. A gene contains information for the production of a protein
D. Each cell contains a single copy of every gene
Correct Answer: D
Q. All ecosystems of the world together form the:
A. Biosphere
B. Population
C. Community
D. Demography
Correct Answer: A
Q. When Charles Elton developed the concept of ecological pyramids?
A. 1921
B. 1923
C. 1925
D. 1927
Correct Answer: D
Q. Which of the following is the abiotic component of the ecosystem?
A. Producers
B. Herbivores
C. Carnivores
D. Oxygen
Correct Answer: D
Q. Which form of nitrogen is taken by the producers of the ecosystem?
A. Nitrogen gas
B. Ammonia
C. Nitrites
D. Nitrates
Correct Answer: D
Q. What is called the use of living organisms in processes for the manufacture of useful products or for services?
A. Biotechnology
B. Bioengineering
C. Biochemistry
D. Biotechnique
Correct Answer: A
Q. Which of these is an anti-viral protein?
A. Urokinase
B. Thymosin
C. Insulin
D. Interferon
Correct Answer: D
Q. ______ is the study of drug composition, properties and medical applications.
A. Pharmacology
B. Pharmacy
C. Antibodies
D. Vaccination
Correct Answer: A
Q. What is called the formation of gametes?
A. Gametology
B. Gametogenesis
C. Gametonics
D. Gametonomy
Correct Answer: B
Q. Pollination is the transfer of pollens from:
A. Anther to stigma
B. Stigma to anther
C. Sepal to petal
D. Petal to sepal
Correct Answer: A
Q. Equal number of chromosomes from each parent are combined during:
A. Fertilization
B. Fermentation
C. Genesis
D. Evolution
Correct Answer: A
Q. The term ‘artificial selection’ was expressed by the Persian scientist Abu Rayhan Biruni in the:
A. 10th century
B. 11th century
C. 12th century
D. 13th century
Correct Answer: B
Q. The producers include plants, algae and:
A. Animals
B. Humans
C. Photosynthetic bacteria
D. Fungi
Correct Answer: C
Q. Which is the primary source of energy for all ecosystems?
A. Earth
B. Moon
C. Soil
D. Sun
Correct Answer: D
Q. Conversion of nitrogen gas into nitrates is called nitrogen:
A. Fixation
B. Formation
C. Conversion
D. Duplication
Correct Answer: A
Q. Conservation of nature means the conservation of:
A. Recycled resources
B. Processed resources
C. Natural resources
D. All resources
Correct Answer: C
Q. When we eat onion, our trophic level is:
A. Primary consumer
B. Secondary consumer
C. Decomposer
D. Producer
Correct Answer: A
Q. Genetic engineering developed in the mid:
A. 1960s
B. 1970s
C. 1980s
D. 1990s
Correct Answer: B
Free Online preparation of AFNS Biology Past MCQs of Intermediate Level
AFNS Biology Past MCQs Book for Entry Test Preparation
Q. Which structure actively helps in taking the air out of lungs?
A. Nasal cavity
B. Bronchus
C. Bronchiole
D. Diaphragm
Correct Answer: D
Q. A disease involving the breakdown of air sacs of the lungs is:
A. Pneumonia
B. Bronchitis
C. Asthma
D. Emphysema
Correct Answer: D
Q. The core temperature of human body remains at about:
A. 33°C
B. 35°C
C. 37°C
D. 40°C
Correct Answer: C
Q. Skin performs role in the maintenance of body temperature and also removes excess water and:
A. Blood
B. Salts
C. Lymph
D. Urea
Correct Answer: B
Q. Which is the correct order for the path taken by urine after it leaves the kidneys?
A. Urethra, bladder, ureters
B. Bladder, ureters, urethra
C. Ureters, bladder, urethra
D. Bladder, urethra, ureters
Correct Answer: C
Q. On the basis of their functions, neurons are of ______ types.
A. Two
B. Three
C. Four
D. Five
Correct Answer: B
Q. Which of these admits light to the interior of eye and bends light rays so that they can be brought to a focus?
A. Sclera
B. Pupil
C. Cornea
D. Iris
Correct Answer: C
Q. Which system uses chemicals to communicate with its effectors?
A. Endocrine system
B. Excretory system
C. Digestive system
D. Nervous system
Correct Answer: A
Q. The part of the brain responsible for muscle movements, interpretation of the senses and the memory is the:
A. Pons
B. Medulla oblongata
C. Cerebrum
D. Cerebellum
Correct Answer: C
Q. The skeletal system of some invertebrates is on the outside of the body, and is called:
A. Exoskeleton
B. Endoskeleton
C. Core skeleton
D. Protective skeleton
Correct Answer: A
Q. Babies are born with about ______ soft bones.
A. 200
B. 250
C. 300
D. 350
Correct Answer: C
Q. Find the ball-and-socket joint.
A. Joint in the finger bones
B. Joint of neck and skull bones
C. Joint at elbow
D. Joint at pelvic girdle and leg bones
Correct Answer: D
Q. When pollen grains mature, they are transferred to:
A. Stigma
B. Style
C. Ovary
D. Ovule
Correct Answer: A
Q. Which study determines the ancestry and relationships among different kinds of organisms?
A. Study of inheritance
B. Study of genes
C. Study of evolution
D. Study of traits
Correct Answer: C
Q. How many genetically different kinds of gametes an individual with genotype AAbb can produce?
A. 1
B. 2
C. 4
D. 8
Correct Answer: A
Q. A group of the organisms of the same species inhabiting a specific geographical area at a particular time is called:
A. Community
B. Geography
C. Ecosystem
D. Population
Correct Answer: D
Q. An undesirable change in the physical, chemical or biological characteristics of air, water and land is called:
A. Destruction
B. Pollution
C. Hazard
D. Decomposition
Correct Answer: B
Q. Organisms in the ecosystem that are responsible for the recycling of plant and animal wastes are:
A. Producers
B. Consumers
C. Decomposers
D. Competitors
Correct Answer: C
Q. Name the process in which there is incomplete oxidation-reduction of glucose.
A. Fermentation
B. Decomposition
C. Reproduction
D. Coagulation
Correct Answer: A
Q. The first step in genetic engineering is:
A. Growth of the genetically modified organism
B. Transfer of the Recombinant DNA into the host organism
C. Isolation of the gene of interest
D. Insertion of the gene into a vector
Correct Answer: C
Q. A pharmaceutical drug or ______ is defined as any chemical substance used in the diagnosis, cure, treatment, or prevention of disease.
A. Addictive drug
B. Medicinal drug
C. Prescribed drug
D. Non-medicinal drug
Correct Answer: B
Q. Antibiotics are used for the:
A. Treatment of viral infections
B. Treatment of bacterial infections
C. Immunization against infections
D. Both ‘a’ and ‘b’
Correct Answer: B
Q. The drugs used to reduce pain are known as:
A. Analgesics
B. Antiseptics
C. Antibiotics
D. Sedatives
Correct Answer: A
Q. Which of these addictive drugs are also used as painkillers?
A. Narcotics
B. Sedatives
C. Hallucinogens
D. All can be used
Correct Answer: A
Q. What is called the transmission of characteristics from parents to offspring?
A. Inheritance
B. Genetics
C. Taxonomy
D. Trait
Correct Answer: A
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