Biology Exam Questions & Answers
Topics Covered: Cell Structure & Enzymes (BIO101 / High School)
Section A: Cell Structure
Question 1
What is a cell?
Answer: A cell is the smallest structural and functional unit of life. All living organisms are made up of cells.
Question 2
State two differences between plant and animal cells.
Answer: - Plant cells have a cell wall; animal cells do not. - Plant cells have chloroplasts for photosynthesis;
animal cells do not.
Question 3
Name three organelles and their functions.
Answer: - Nucleus – Controls cell activities and contains DNA. - Mitochondria – Produces energy through
respiration. - Ribosomes – Synthesizes proteins.
Section B: Enzymes
Question 4
What are enzymes?
Answer: Enzymes are proteins that act as biological catalysts to speed up chemical reactions in living
organisms.
Question 5
Give two factors that affect enzyme activity.
Answer: - Temperature – High temperature can denature enzymes. - pH – Each enzyme has an optimum pH
for activity.
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Topics Covered: Cell Structure & Enzymes (BIO101 / High School)
Section A: Cell Structure
Question 1
What is a cell?
Answer: A cell is the smallest structural and functional unit of life. All living organisms are made up of cells.
Question 2
State two differences between plant and animal cells.
Answer: - Plant cells have a cell wall; animal cells do not. - Plant cells have chloroplasts for photosynthesis;
animal cells do not.
Question 3
Name three organelles and their functions.
Answer: - Nucleus – Controls cell activities and contains DNA. - Mitochondria – Produces energy through
respiration. - Ribosomes – Synthesizes proteins.
Section B: Enzymes
Question 4
What are enzymes?
Answer: Enzymes are proteins that act as biological catalysts to speed up chemical reactions in living
organisms.
Question 5
Give two factors that affect enzyme activity.
Answer: - Temperature – High temperature can denature enzymes. - pH – Each enzyme has an optimum pH
for activity.
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