Photosynthesis：練習題

Which of the following describes the nature of photosynthesis as a chemical reaction?

Plants absorb nitrate ions from the soil. Which metabolic process is the primary use for these ions in conjunction with the glucose produced in photosynthesis?

A student investigates the inverse square law of light intensity. If the distance from a light source to a plant is increased by a factor of 3 (e.g., from \(10\text{ cm}\) to \(30\text{ cm}\)), how will the light intensity change?

Which of the following is a correct use of the glucose produced during photosynthesis in plants?

A student sets up an experiment to measure the rate of photosynthesis by counting bubbles from pondweed. If the light source is moved from a distance of \(20\text{ cm}\) to \(10\text{ cm}\), how does the light intensity change according to the inverse square law?

Explain how the cellulose cell wall in plant cells is related to the products of photosynthesis.

Plants can convert the glucose produced in photosynthesis into several different substances. Name two such substances and describe their specific uses within the plant.

The inverse square law describes the relationship between light intensity and distance. If a plant is moved from a distance of \(d\) to a distance of \(3d\) from a light source, calculate the new light intensity as a fraction of the original intensity \(I\).

Plants produce glucose during photosynthesis. This glucose has several important uses within the plant.

a) Name the insoluble substance that glucose is converted into for storage.
b) Explain why it is an advantage for a plant to store carbohydrates as an insoluble substance rather than as soluble glucose.
c) State one other use of glucose in a plant, besides storage or respiration.

A student investigated the rate of photosynthesis by counting the number of bubbles produced by pondweed at different light intensities.

a) Explain the effect of temperature and carbon dioxide concentration on the rate of photosynthesis.
b) In a follow-up experiment, the student noticed that even with very high light intensity, the rate of photosynthesis did not increase further. Suggest one factor that could be limiting the rate in this situation.