Biology: Chapter 6

Question 1

Definition of Photosynthesis

Answer 1

The process by which plants synthesise carbobydrates from raw materials using energy from light.

Question 2

What is the function of chlorophyll?

Answer 2

To capture energy from sunlight

Question 3

How do carbohydrates get energy?

Answer 3

Chlorophyll transfers energy from sunlight to energy in carbohydrates.

Question 4

What is the word equation for photosynthesis?

Answer 4

carbon dioxide + water – (sunlight and chlorophyll)&raquo_space; glucose + oxygen

Question 5

What is the balanced chemical equation of photosynthesis?

Answer 5

6CO2 + 6H2O -> C6H12O6 + 6O2

Question 6

What are the factors that affect photosynthesis?

Answer 6

• supply of raw materials (CO2 and water)
• quantity of sunlight
• temperature
• amount of chlorophyll (or type of plant / size of plant)

Question 7

How does temperature affect photosynthesis?

Answer 7

• high temperature&raquo_space; faster photosynthesis
• enzyme optimum temperature
• stomata will close when it’s hot

Question 8

How does carbon dioxide concentration affect photosynthesis?

Answer 8

The more carbon dioxide a plant is given, the faster the rate of photosynthesis. But once it reaches a certain level, there is no further increase in the rate of photosynthesis.

Question 9

How does light intensity affect photosynthesis?

Answer 9

As light intensity increases, the rate of photosynthesis increases. But after a certain point, the plant cannot photosynthesise any faster.

Question 10

Definition of Limiting Factor

Answer 10

A factor that is in short supply, which stops an activity happening at a faster rate.