B8 - Photosynthesis

Question 1

What is photosynthesis?

Answer 1

• An endothermic reaction.

Question 2

What happens during the process of photosynthesis?

Answer 2

• Energy is transferred from the environment to the chloroplast by light.
• Used to convert carbon dioxide and water into glucose.
• Oxygen is also a formed and released as a by-product.

Question 3

Photosynthesis Equation

Answer 3

CO2 + H20 (light —->) Glucose + Oxygen.

Question 4

How and why are leaves adapted to let photosynthesis happen?

Answer 4

To allow the maximum amount of photosynthesis to take place.

Question 5

What can the rate of photosynthesis be affected by?

Answer 5

Light intensity, temperature, level of carbon dioxide and the amount of chlorophyll.

Question 6

Light Intensity and the Inverse Square Law.

Answer 6

Light intensity is indirectly proportional to 1/distance^2.

Question 7

How do plant and algal cells use glucose produced during photosynthesis?

Answer 7

• For respiration to convert into insoluble starch for storage, to produce fats or oils for storage, to produce cellulose to strengthen cell walls, and to produce amino acids for protein synthesis.
• Also need nitrate ions absorbed from the soils or water to make animo acids used to make proteins.

Question 8

Characteristics of the factors that limit photosynthesis.

Answer 8

Interact and any one of them may limit photosynthesis.

Question 9

How are limiting factors important?

Answer 9

In the economics of enhancing the conditions in greenhouses to gain the maximum rate of photosynthesis, while still maintaining profits.