Biology - B4: Bioenergetics

Question 1

What is photosynthesis?

Answer 1

The process used by plants to turn light energy into chemical energy for respiration

Question 2

What is the balanced chemical equation for photosynthesis?
Give the word and formula eqns.

Answer 2

1. water + carbon dioxide → oxygen + glucose
2. 6H2O + 6CO2 → 6O2 + C6H12O6

Question 3

Where in the plant does photosynthesis take place?

Answer 3

The leaf

Question 4

Which type of leaf cell does photosynthesis occur in?
Where exactly in the leaf cell does photosynthesis occur and how does this organelle aid photosynthesis?

Answer 4

Palisade cells
Chloroplasts which have chlorophyll in them to capture light

Question 5

Is photosynthesis an endothermic or exothermic reaction?

Answer 5

Endothermic - light energy from the Sun is needed for photosynthesis to happen

Question 6

What factors affect rate of photosynthesis?

Answer 6

• temperature
• light intensity
• carbon dioxide concentration
• the amount of chlorophyll

Question 7

What is a limiting factor?

Answer 7

A factor which, if in short supply limits or reduces the rate of photosynthesis