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National 5 Biology Unit 2 Questions and Answers | Latest Version | 2025/2026 | Correct & Verified
What type of transport does not require energy in cells?✔✔Passive transport
What is osmosis?✔✔The movement of water molecules from a region of higher water concentration to a region of lower water concentration through a selectively permeable membrane
What is the process by which cells make energy from glucose in the presence of oxygen?✔✔Aerobic respiration
What is the role of mitochondria in cells?✔✔To produce energy in the form of ATP through respiration
What is the chemical formula for glucose?
✔✔C6H12O6 1 / 3
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What is the role of enzymes in biological reactions?✔✔To speed up chemical reactions by lowering the activation energy
What does a catalyst do in a biological process?✔✔It increases the rate of reaction without being consumed in the process
What is the optimum temperature for most human enzymes?
✔✔37°C
What is the role of chloroplasts in plant cells?✔✔To carry out photosynthesis
What are the end products of photosynthesis?✔✔Glucose and oxygen
What is the importance of chlorophyll in photosynthesis?✔✔It absorbs light energy, primarily from the sun, and converts it into chemical energy 2 / 3
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What is the equation for photosynthesis?✔✔6CO2 + 6H2O + light energy → C6H12O6 + 6O2
What is the process by which organisms break down glucose to release energy without oxygen?✔✔Anaerobic respiration
What is the product of anaerobic respiration in yeast?✔✔Ethanol and carbon dioxide
What is the product of anaerobic respiration in humans?✔✔Lactic acid
What is the function of red blood cells?✔✔To transport oxygen from the lungs to the tissues and carbon dioxide from the tissues to the lungs
What is the function of white blood cells?
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