Unit 1 Cell Biology
Topic 7 Photosynthesis
National 5
Homework 2
1. The diagrams below show the two stages of photosynthesis.
During the first stage of photosynthesis, light energy is used.
a)
b)
i)
Where is light energy trapped in the cell?
KU1
ii)
State one use of this light energy.
KU1
i)
Name the second stage of photosynthesis.
KU1
ii)
Name the carbohydrate produced during the second stage of
photosynthesis.
KU1
2. The rate of photosynthesis can be limited by different factors.
Draw one line from each set of conditions to the factor that would be
limiting photosynthesis.
KU2
Unit 1 Cell Biology
Topic 7 Photosynthesis
National 5
3. The graph below shows the effects of two different environmental
factors on the rate of photosynthesis.
a)
What are the limiting factors at points X and Y?
X
Y
PS1
PS1
b)
Suggest one way that the rate of photosynthesis can be measured.
KU1
c)
Explain why soot deposits on leaves reduce the rate of
photosynthesis.
PS1