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biology 0610printed 53 · PDF 53
328 pagesrevision 46933
printed 53 · PDF 53
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(c)
Proteins and DNA are important nitrogen-containing compounds in cells.
Describe the roles of proteins and DNA in cells.
proteins
[3]
[2]
(c)
CON OUNWHh =
proteins in cells
enzymes ;
control / catalyse, reactions / AW ;
e.g. respiration / photosynthesis ; A ref. to any specific reaction(s)
(part of cell) membranes ;
carrier proteins / description of role allowing movement in and out of cell ;
haemoglobin ;
transport of, oxygen / carbon dioxide / gases ;
making cytoplasm / (cell) growth ;
AVP ; e.g. chloroplast / named organelle / providing energy
DNA in cells
ref. to, genes / alleles / genetic information / genetic code ;
control functions of the cell ;
code for proteins ;
AVP ; e.g. a specific feature of cells / cell division / mitosis / meiosis
[max 3]
R digestion unless clearly inside cell,
e.g. in a phagocy
A protein pumps
R antibodies / hormones / collagen /
keratin
ignore repair
R produce / make energy
R hereditary material / AW
A'sends messages to the cytoplasm’ /
‘tells the cells what to do’
Aref. tomRNA
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