Biology · May / June 2022 · Paper 42 · Question 1

0610

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The question as text

Fig. 1.1 shows a spongy mesophyll cell from the leaf of a plant. The arrows show the net direction of movement of carbon dioxide molecules during daylight. A B C D E F G 0.01 mm Fig. 1.1

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1(a)[1]
10 (μm) ;
1(b)[5]
letter in function
structure
Fig. 1.1
storage of DNA / controls
(named) activity of cell
nucleus
C
/ produces RNA
/ makes ribosomes
photosynthesis
chloroplast
E
/ absorb light / AW
mitochondrion
aerobic respiration
D
/ mitochondria
contains cell sap and
vacuole
B
stores water
supports (the cell)
/ resists turgor pressure
cell wall
A
/ prevents bursting / AW
1(c)(i)[1]
diffusion ;
1(c)(ii)[2]
(enters through) stoma(ta) / between guard cells ;
(moves through) interconnecting / intercellular / air, spaces ;
1(d)(i)[1]
limiting factor ;
1(d)(ii)[1]
(low / no) light intensity / (extreme air) temperature / (low / no) water (availability) / (incorrect) (wavelength of light / (short) day length ;
1(e)[2]
any two from:
1
reduces, extraction / conserves, (named) fossil / non-renewable, fuels ;
2
(temporarily) removes, carbon dioxide / greenhouse gases (from atmosphere) / does not add more, carbon dioxide / greenhouse gas (to the atmosphere) / idea that the process is carbon neutral ; 3
does not cause / prevents a further increase in, enhanced greenhouse effect ;
4
does not cause / prevents further increase in global warming / prevents further climate change ;
5
it is a sustainable process / uses renewable fuel source / described ; 6
AVP ; e.g. described example of less environmental impact caused by use of non-renewable (fossil) fuels ;

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