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Course: Cambridge AS & A Level Biology 9700 ...
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Cambridge AS & A Level Biology 9700 — Revision Notes

1 · Cell Structure

0/26

2 · Biological Molecules

0/51

3 · Enzymes

0/29

4 · Cell Membranes and Transport

0/41

5 · The Mitotic Cell Cycle

0/21

6 · Nucleic Acids and Protein Synthesis

0/22

7 · Transport in Plants

0/28

8 · Transport in Mammals

0/39

9 · Gas Exchange

0/13

10-11 · Infectious Disease and Immunity

0/43

12 · Energy and Respiration

0/37

13 · Photosynthesis

0/23

14-15 · Homeostasis and Control

0/57

16 · Inherited Change

0/33

17-18 · Selection, Evolution, Classification and Conservation

0/70

19 · Genetic Technology

0/44
Quiz

13.2.2 Investigating the Rate of Photosynthesis – Exam questions

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  • Questions count: 11
  • Passing grade: B+
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1.
Increasing light always increases the rate of photosynthesis. True or false?
False
True
True in greenhouses
True at night
2.
A graph shows photosynthesis rate rising with light intensity and then leveling off. The plateau is best explained by
another factor such as CO2 becoming limiting
chlorophyll being destroyed
the plant switching to respiration
stomata absorbing too much light
3.

Which factor can limit the rate of photosynthesis?

Light intensity
Oxygen concentration (high)
Nitrogen gas
Soil colour
4.
In an experiment on the effect of light intensity on photosynthesis rate, the dependent variable is:
light intensity
temperature
type of plant
rate of O2 production
5.
In a photosynthesis investigation, the rate can be measured by counting:
Roots
Flowers
Bubbles of oxygen per minute
Leaves on the plant
6.
How could the ecologist calculate the rate of photosynthesis in the pond water?
SAT Biology - Question 077
A
B
C
D
E
7.
Rate of photosynthesis at two CO₂ levels is shown. At what light intensity does CO₂ become the limiting factor at 0.04% CO₂?
Below 10 units
At 0 units
Above about 30 units of light
CO₂ is never limiting
8.

At low light intensity the rate of photosynthesis is limited by

carbon dioxide concentration
temperature
light intensity
chlorophyll
9.

At high light intensity and warm temperature, the rate of photosynthesis in a field crop is most likely limited by

carbon dioxide concentration
light intensity
water
oxygen
10.

Aquatic plants such as Elodea are useful for measuring the rate of photosynthesis because

they have no chloroplasts
they do not respire
they need no light
the oxygen produced can be collected and measured
11.
Moving a lamp closer to pondweed usually increases the rate of bubbling.
True
False
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Part of 13 · Photosynthesis — see every lesson and quiz in this unit.
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