2004 jan module 1 ms
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1.
Carbohydrate One role in living organisms
Glucose;
Form in which plants transport carbohydrate / energy source;
Glycogen;
In plant cell walls;
[4]
2. (a) Tissues are groups of (similar) cells performing similar functions;
rgans are a number of tissues that perform a function !
(b) "agnification is the number of times bigger an image is than
the #specimen / original$;
%esolution is the #ability to distinguish two points as separate
points / degree of detail visible$ ![4]
3. (a) (i) Glycerol / propan &' !' triol &
(ii) ster &
(b) (*tearic acid / saturated fatty acids$ have more hydrogen atoms;
#*tearic acid / saturated fatty acids$ have no double carbon+carbon bonds;
#*tearic acid / saturated fatty acids$ have no ,in,s;
-allow converse statements about unsaturated fatty acids. !
(c) & nergy stores;
0ualification1 #"ore than / twice as much as) carbohydrate% Insoluble / compact / minimise mass
% *ubcutaneous / adipose / blubber;
! 2rotection / mechanical insulation;
0ualification1 3round #organs / named organ$
% %eference to adipose tissue
% ar wa4 giving protection against infection;
5aterproofing;
0ualification1 f s,in / fur / feathers / insect cuticle / ear wa4
% 6ydrophobic / insoluble / repels water;
7 lectrical insulation;0ualification1 %eference to myelin sheath / nerve cells /
neurones / a4ons / dendrons
% 8on+polar;
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9 6eat insulation;
0ualification1 *ubcutaneous / adipose / blubber
% 2revents heat loss from body;
: uoyancy;
0ualification1
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6. (a) 3 8ucleus/chromatin/nucleoplasm;
"itochondrion; !
(b) Correctly measured length;
(
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(b) (i) 6ydrolysis; &
(ii) Glycosidic (+&'7) &
(iii) & Hse water as basis to compare effect;
! Copper sulphate decreases rate of cellulose brea,down;
#Increase in concentration / higher concentrations) decreasesrate of brea,down even more;
7 3fter si4 days more cellulose bro,en down at lower
concentrations;
9 Credit manipulations of data to compare brea,down of
solutions at different concentrations
(iv) & Aisulphide bonds maintain #(tertiary/A)structure/shape$;
! If disulphide bonds brea,' the active site will be altered;
Cellulose will no longer fit into the active site / eD;
7 Cellulose will not be digested;
9 3s copper ions increase more enBymes are affected;
: %eference to non+active site directed inhibitor; [12]
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