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
,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
, 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?
3
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
,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
, 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?
3
