PPSC/NTS Most Repeated Biology MCQS with answers

What is the powerhouse of the cell?
a) Nucleus
b) Ribosome
c) Mitochondria
d) Golgi apparatus
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Which part of the plant conducts photosynthesis?
a) Roots
b) Stem
c) Leaves
d) Flowers
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What is the basic unit of life?
a) Molecule
b) Atom
c) Cell
d) Tissue
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Which organ is responsible for pumping blood throughout the body?
a) Brain
b) Lungs
c) Liver
d) Heart
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DNA stands for:
a) Deoxyribonucleic acid
b) Deoxyribose nucleic acid
c) Di-ribonucleic acid
d) Deoxyribonitric acid
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Which blood cells are responsible for fighting infections?
a) Red blood cells
b) White blood cells
c) Platelets
d) Plasma cells
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What is the process by which plants make their food called?
a) Respiration
b) Digestion
c) Photosynthesis
d) Fermentation
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The human body’s largest organ is:
a) Liver
b) Brain
c) Skin
d) Heart
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What type of macromolecule are enzymes?
a) Carbohydrates
b) Lipids
c) Proteins
d) Nucleic acids
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Which vitamin is produced when the skin is exposed to sunlight?
a) Vitamin A
b) Vitamin B
c) Vitamin C
d) Vitamin D
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The process by which a cell divides into two daughter cells is called:
a) Mitosis
b) Meiosis
c) Cytokinesis
d) Binary fission
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Which part of the brain controls voluntary actions?
a) Cerebellum
b) Medulla oblongata
c) Cerebrum
d) Brainstem
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Hemoglobin is a protein found in:
a) Plasma
b) Red blood cells
c) White blood cells
d) Platelets
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Which organ filters blood to produce urine?
a) Liver
b) Kidney
c) Bladder
d) Spleen
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The process by which plants lose water vapor through their leaves is called:
a) Transpiration
b) Respiration
c) Perspiration
d) Evaporation
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What is the most abundant gas in Earth’s atmosphere?
a) Oxygen
b) Carbon dioxide
c) Nitrogen
d) Hydrogen
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The smallest bone in the human body is the:
a) Femur
b) Stapes
c) Radius
d) Tibia
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What is the main function of the roots of a plant?
a) Photosynthesis
b) Reproduction
c) Absorption of water and minerals
d) Protection
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The genetic material in cells is located in the:
a) Cytoplasm
b) Cell membrane
c) Nucleus
d) Mitochondria
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The type of symbiotic relationship where both organisms benefit is called:
a) Parasitism
b) Commensalism
c) Mutualism
d) Predation
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The basic building blocks of proteins are:
a) Monosaccharides
b) Fatty acids
c) Amino acids
d) Nucleotides
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Which hormone regulates blood sugar levels?
a) Adrenaline
b) Thyroxine
c) Insulin
d) Estrogen
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The primary pigment involved in photosynthesis is:
a) Chlorophyll
b) Carotene
c) Xanthophyll
d) Anthocyanin
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The study of heredity and the variation of inherited characteristics is called:
a) Ecology
b) Genetics
c) Cytology
d) Physiology
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Which type of tissue connects muscles to bones?
a) Ligaments
b) Cartilage
c) Tendons
d) Adipose
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Which blood type is known as the universal donor?
a) A
b) B
c) AB
d) O
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The liquid component of blood is called:
a) Plasma
b) Platelets
c) Hemoglobin
d) Serum
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The structural and functional unit of the kidney is the:
a) Nephron
b) Alveolus
c) Neuron
d) Glomerulus
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Which part of the cell contains the genetic information?
a) Mitochondria
b) Ribosome
c) Nucleus
d) Endoplasmic reticulum
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The process by which organisms with favorable traits are more likely to survive and reproduce is called:
a) Genetic drift
b) Natural selection
c) Mutation
d) Gene flow
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