Question

Nelson 46. The final product of the Calvin cycle is A) Ribulose Bisphosphate B) PGA C) АТР D)Glyceraldehyde-3-phosphate 47. Water vapor exits and Co, enters a leaf through the A) stomata B) grana C) porphyrin rings D) photons E) stroma 48. In a plant leaf, the reactions that produce NADPH occur in A) the light reactions alone. B) the Calvin cycle alone. C) both the light reactions and the Calvin cycle. D) neither the light reactions nor the Calvin cycle. E) the chloroplast, but is not part of photosynthesis. 49. During photosynthesis, the reactions that require CO2 take place in A) the light reactions alone. B) the Calvin cycle alone. C) both the light reactions and the Calvin cycle. D) neither the light reactions nor the Calvin cycle. E) the chloroplast, but is not part of photosynthesis. 50. Reduction of oxygen to form water occurs during A) photosynthesis only. B) respiration only. C) both photosynthesis and respiration. D) neither photosynthesis nor respiration. E) photorespiration only.

Answer 1

Answers

Question 46: Choice D

Explanation: Glyceraldehyde-3-phosphate or G3P is mainly used to produce glucose by chloroplast. It can store in as starch of export in the form of sucrose to cytoplasm and other plant parts.

Question 47: Choice A

Explanation: stomata is a pore like structure of leaf allows the gas exchange by allowing CO2 to influx and water vapour efflux.

Question 48: Choice A

Explanation: Light reaction occur in the chloroplast of the thylakoid membrane will produce 2 molecules helps to provide energy such as NADPH and ATP. This can used for photosynthesis.

Question 49: Choice B

Explanation: CO₂ from the photosynthesis used to start the calvin cycle. 3 CO₂ molecules which enter to the cycle will bind with Rubisco and cycle continues.

Question 50: Choice B

Explanation: During respiration both oxidation and reduction will takes place to form water molecules from oxygen.

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