gce winter 2010 - question paper - KCSE Online
gce winter 2010 - question paper - KCSE Online
gce winter 2010 - question paper - KCSE Online
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8<br />
Examiner<br />
only<br />
4. The graph shows the relationship between the rate of photosynthesis and carbon dioxide<br />
concentration in the green plant Hormidium at different light intensities and temperatures.<br />
6 kilolux 20˚C<br />
A<br />
Rate of<br />
photosynthesis<br />
/arbitrary units<br />
6 kilolux 14˚C<br />
2 kilolux 20˚C<br />
B<br />
C<br />
0 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16<br />
Carbon dioxide concentration / %<br />
(a) (i) Explain the shape of the curve A. [2]<br />
.........................................................................................................................................................................................................<br />
.........................................................................................................................................................................................................<br />
.........................................................................................................................................................................................................<br />
.........................................................................................................................................................................................................<br />
(ii) Explain why there is a difference between graphs. [2]<br />
A and B ..................................................................................................................................................................<br />
............................................................................................................................................................................................<br />
A and C ..................................................................................................................................................................<br />
............................................................................................................................................................................................<br />
(314-01)
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