Student Name:
1. Define photosynthesis.
2. Write a word equation and balanced symbol equation for the process of photosynthesis.
Word:
Symbol
3. Glucose is a product of photosynthesis. It can be used directly in respiration, stored as starch or
converted to glucose.
a. Explain why a plant which is left in the dark for a long period of time will test negative for
starch.
4. Light from the Sun is composed of a range of wavelengths (colors).
a. Outline the properties of these wavelengths of light:
10-400
Wavelength (nm)
400-500
500-650
700-800
0.8-1000µm
Name
Ultraviolet
Infra-red
Photosynthesis?
No
No
Visible?
No
Energy
Very High
Low
Frequency
Very High
Low
Yes
Yes
Yes
No
5. State the name of the photosynthetic pigment and its location in green plants.
Name: ________________________
Location: ______________________________
6. Distinguish between action and absorption spectra for photosynthesis.
Action:
Absorption:
Student Name:
7. In the space below, draw a graph showing the action and absorption spectra for chlorophyll.
Annotate the diagram to show why leaves appear green.
Leaves appear green because…
Summarize the two main stages of photosynthesis:
Input
Light energy is used to…
Light-dependent
reactions
Light
independent
reactions
8. Define rate, with regard to reactions.
Outcome
Student Name:
9. Outline the effects of the following variables on the rate of photosynthesis.
Sketch and annotate a graph for each one.
Light intensity
Note: light intensity is not the same as wavelength or frequency. Light intensity refers to the amount of light of a given
wavelength which is available to the plant. Light intensity is high at the equator, in the summer or at midday.
Temperature
Carbon dioxide concentration
Student Name:
10. In the space below, draw and label a diagram of a chloroplast.
Include thylakoid, stroma, chloroplast and granum. Annotate the diagram with the function of
each component.
11. Explain what happens to an electron when it is excited by photons of light.
12. Identify the two products of the light-dependent reactions which are carried through to the
light- independent reactions.
o
o
Student Name:
A limiting factor is the one factor which is in shortest supply or is preventing the rate of a reaction from
increasing. If this factor were increased, rate of reaction would increase until another plateau was
reached (a different factor is then limiting).
13. Explain how the following factors can limit the rate of photosynthesis of green plants:
(give reasons specific to the reactions of photosynthesis)
Factor
Which stages of photosynthesis are limited and how?
Carbon dioxide concentration
Light intensity
Temperature
14. Using the graph below, deduce, with reasons, the most important limiting factor in the
rate of photosynthesis of this green plant.
Student Name:
15. Compare photosynthesis and respiration.
Take time to think about all the connections – reactions, structures, products and processes.
Cell Respiration
Similarities
Differences
Photosynthesis