Bio C6

Question 1

1. What is photosynthesis?

Answer 1

Photosynthesis is the process where some organisms are able to make complex carbohydrates using the energy from light

Question 2

2. What is the word equation for photosynthesis?

Answer 2

Carbon dioxide + Water → Glucose + Oxygen (in the presence of light and chlorophyll)

Question 3

3. What is the symbol equation for photosynthesis?

Answer 3

(in the presence of light and chlorophyll)

Question 4

4. What is chlorophyll used for in photosynthesis?

Answer 4

Chlorophyll is used to trap light energy and transfer it into chemical energy so that it can be used to build complex organic molecules (e.g. glucose).

Question 5

5. Give 5 uses of the carbohydrates made in photosynthesis

Answer 5

Respiration for energy, store as starch, used as structural components like cellulose for cell walls, form into sucrose to transport, form nectar

Question 6

6. What is a limiting factor? When may light, temperature, and CO2 concentration be limiting factors for photosynthesis?

Answer 6

A factor that limits the rate of a reaction when there is not enough of it
Light: In a dense forest or at night
Temperature: winter
CO2: When carbon dioxide cannot be exchange into the stomata, such as plants close the stomata during hot noon.

Question 7

7. What are nitrate ions used for in plants?

Answer 7

They are used in the synthesis of amino acids

Question 8

8. What are magnesium ions used for in plants?

Answer 8

Make chlorophyll

Question 9

9. Identify the structures labelled in this diagram of a leaf

Answer 9

Question 10

10. How is the spongy mesophyll layer adapted for photosynthesis?

Answer 10

It is packed loosely which allows gases to diffuse through the plant for photosynthesis (CO2 in, O2 out)

Question 11

11. How is the palisade mesophyll layer adapted for photosynthesis?

Answer 11

It contains long and thin cells with many chloroplasts and lots of chlorophyll to carry out photosynthesis