SS2 Third Term Biology Past Questions And Answers
20 third-term Biology questions with options and answers:
Question: Which cellular structure is responsible for maintaining cell shape and providing support?
a) Nucleus
b) Cytoskeleton
c) Endoplasmic reticulum
d) Golgi apparatus
Answer: b) Cytoskeleton
Question: What is the function of RNA polymerase during transcription?
a) Synthesizing DNA
b) Reading RNA
c) Synthesizing RNA from DNA
d) Translating proteins
Answer: c) Synthesizing RNA from DNA
Question: In which phase of mitosis do chromosomes align at the center of the cell?
a) Prophase
b) Metaphase
c) Anaphase
d) Telophase
Answer: b) Metaphase
Question: What is the purpose of the Krebs cycle in cellular respiration?
a) Glycolysis
b) ATP production
c) Electron transport chain
d) Breaking down acetyl-CoA
Answer: d) Breaking down acetyl-CoA
Question: Which environmental factor is essential for photosynthesis to occur in plants?
a) Carbon dioxide
b) Oxygen
c) Nitrogen
d) Sunlight
Answer: d) Sunlight
Question: What is the function of the pituitary gland in the endocrine system?
a) Producing insulin
b) Regulating growth and hormones
c) Storing bile
d) Filtration of blood
Answer: b) Regulating growth and hormones
Question: What is the role of the semilunar valves in the heart?
a) Preventing blood from flowing back into the atria
b) Controlling blood flow between the atria and ventricles
c) Initiating the heartbeat
d) Oxygenating blood
Answer: a) Preventing blood from flowing back into the atria
Question: Which process involves the formation of messenger RNA from DNA?
a) Replication
b) Translation
c) Transcription
d) Transformation
Answer: c) Transcription
Question: What is the function of the nephron in the kidneys?
a) Filtration of blood
b) Producing insulin
c) Storing urine
d) Absorbing nutrients
Answer: a) Filtration of blood
Question: Which type of cell division produces identical daughter cells for growth and repair?
a) Meiosis
b) Mitosis
c) Binary fission
d) Budding
Answer: b) Mitosis
Question: What is the primary function of the alveoli in the respiratory system?
a) Trapping dust and pathogens
b) Facilitating gas exchange
c) Producing antibodies
d) Regulating blood pressure
Answer: b) Facilitating gas exchange
Question: Which hormone is responsible for regulating blood sugar levels?
a) Insulin
b) Thyroxine
c) Adrenaline
d) Estrogen
Answer: a) Insulin
Question: What is the function of the cornea in the human eye?
a) Focusing light onto the retina
b) Producing tears
c) Changing the shape of the lens
d) Regulating the amount of light entering the eye
Answer: a) Focusing light onto the retina
Question: Which part of the human ear is responsible for detecting sound vibrations?
a) Cochlea
b) Eardrum
c) Auditory nerve
d) Vestibule
Answer: a) Cochlea
Question: What is the role of the lymphatic system in the body?
a) Regulating blood pressure
b) Transporting oxygen
c) Fighting infections and draining excess fluids
d) Producing hormones
Answer: c) Fighting infections and draining excess fluids
Question: What is the function of the synaptic cleft in the nervous system?
a) Transmitting nerve signals
b) Releasing neurotransmitters
c) Filtering blood
d) Initiating the heartbeat
Answer: b) Releasing neurotransmitters
Question: Which process involves the exchange of gases between the blood and body tissues?
a) Osmosis
b) Diffusion
c) Filtration
d) Active transport
Answer: b) Diffusion
Question: What is the primary function of the epidermis in the skin?
a) Producing sweat
b) Protecting against pathogens and water loss
c) Synthesizing melanin
d) Storing fat
Answer: b) Protecting against pathogens and water loss
Question: In which part of the human brain is memory processing primarily located?
a) Cerebrum
b) Hippocampus
c) Thalamus
d) Medulla oblongata
Answer: b) Hippocampus
Question: What is the function of the adrenal glands in the endocrine system?
a) Producing insulin
b) Regulating blood pressure
c) Releasing stress hormones like cortisol and adrenaline
d) Filtration of blood
Answer: c) Releasing stress hormones like cortisol and adrenaline.
