Nutrition Quiz
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5 questions, one answer each
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1. What are the products of photosynthesis?
- A. Carbon dioxide and water
- B. Glucose and oxygen
- C. Glucose and carbon dioxide
- D. Oxygen and water
2. Why do plants need nitrate ions?
- A. To make chlorophyll
- B. To make amino acids
- C. To make glucose
- D. To make cellulose
3. Which statement about bile is correct?
- A. Bile is an enzyme that digests fats
- B. Bile emulsifies fats and neutralises stomach acid
- C. Bile digests proteins into amino acids
- D. Bile is produced in the gall bladder
4. A plant is kept in bright light with plenty of water but very low CO2 concentration. What is most likely to happen to its rate of photosynthesis if light intensity is increased further?
- A. It will increase proportionally with light
- B. It will stay the same, because CO2 is the limiting factor
- C. It will decrease
- D. It will double for every increase in light
5. A student compares the surface-area-to-volume properties of the small intestine lining. Villi are described as being adapted for absorption. Which combination of features best explains why villi maximise the rate of nutrient absorption?
- A. Thick walls and low blood supply
- B. Large surface area, thin walls and a good blood supply maintaining a steep concentration gradient
- C. Large surface area only, blood supply is not relevant
- D. Small surface area but very active transport