8/13/2019 2004 Jan Module 1 MS

1/4

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;

1

8/13/2019 2004 Jan Module 1 MS

2/4

9 6eat insulation;

0ualification1 *ubcutaneous / adipose / blubber

% 2revents heat loss from body;

: uoyancy;

0ualification1

8/13/2019 2004 Jan Module 1 MS

3/4

6. (a) 3 8ucleus/chromatin/nucleoplasm;

"itochondrion; !

(b) Correctly measured length;

(

8/13/2019 2004 Jan Module 1 MS

4/4

(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]

4