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biology 0610printed 80 · PDF 80
328 pagesrevision 46933
printed 80 · PDF 80
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Aitchison College Academic Resources.
1 (a) one mark for the correct chemical formulae
6CO,+6H,0 > CgH20, + 602;; one mark for balancing the equation correctly
[2] R word equation
(b) as wavelength increases, rate (of photosynthesis) decreases and units must be used once in the answer
increases ; A volume of gas for rate
high rates in, blue and violet and red/400-475nm and 675nm ;
low(est) rate in, green and yellow/550-600 nm ;
either
maximum rate = 0.9cm*, at 675nm/red
or
minimum rate = 0.2cm®, at 550nm/green ; [max 3]
(c) divide the volumes by, five (minutes)/time ; (1)
(d) (i) | to keep the light intensity the same ; R temperature | ‘fair test’
A ‘control light intensity’ / ‘light intensity is a
(1) control(led) variable’
(ii) | to provide carbon dioxide/so carbon dioxide is not a limiting factor/
so the only limiting factor is wavelength ; (1)
(e) for, respiration / energy ; I protein synthesis / growth/ active transport
converted to sucrose ; R produces energy
used to make, nectar/ fruits ;
used to make, cellulose /lignin ;
used in cell walls ;
used to make, starch/oils/fats ; I ‘makes food’, but A ‘stores food’ for 1 mark
storage ;
used to make, amino acids ;
used to make, chlorophyll ; [max 3]
Water is required for the process of photosynthesis.
0)
Describe where and how water enters a plant.
)
Describe one function of water in a plant other than for photosynthesis.
(iii)
State the name of the tissue in a plant that transports water.
(iv)
State the name of the part of aleaf throu
80
which most water vapour is lost from the plant