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1.

Statement Sucrose Maltose

Contains glucose

Is a reducing sugar

Contains glycosidic bonds

Is transported in the

phloem of flowering plants

Encircle CORRECT answers

Any TWO correct responses ! mar"

#lan"s and ambiguous tic"s are incorrect

$ut correct numbers of tic"s to correspond with total mar"

[4]

2. %&O '

(di)polar '

%ydrogen * % '

Sol+ent '

(specific) heat capacity '

[not latent heat capacity]

[5]

3. (a) A flagellum '

# ,-A * (bacterial) chromosome 'C cell wall ' .

(b)

Mar"ing

point

$ro"aryotic cell Eu"aryotic cell

! Smaller /arger '

& ,o not ha+e a nucleus *

nucleolus * ha+e a nucleoid

%a+e a nucleus * nuclear en+elope *

nucleolus (allow description) * no

nucleoid '

. ,o not ha+e membrane0boundorganelles * absence of named

organelle

%a+e membrane0bound organelles *presence of named membrane0bound

organelle '

01 Smaller * 23S ribosomes /arger * 43S ribosomes '

5 Mesosomes * description of

infoldings

-o mesosomes '

6 Circular ,-A /inear ,-A '

02 -o histones * chromosomes %istones * chromosomes '

4 Murein * mucopeptide *

peptidoglycan cell walls * nocellulose

Cellulose cell walls (if present) '

7 8lagellum with no microtubules * 8lagellum with microtubules * 79&

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(b) 8olding of secondary structure * e: '

To form irregular * ., * globular shape '

Maintained by; hydrogen * ionic * disulphide bonds * e: '

#onding determined by R0groups '

Shape is important for function ' ma< .[6]

5. (a) !1 mm (allow !& 0 !5 mm) '

= 433 '

!2>5 * !4>3 ' .

[allow consequential error]

(b) Only & cells drawn (,)'

#oth cells with correct magnification (M) '

-ucleus of A has correct shape (-) '

,rawn with single line and no additional details * structures (/) ' 1[7]

6. (a) Reference to named stain (acetic orcein * acetocarmine * 8eulgens * Schiffs) '

Warm * heat '

#rea" open tip with (mounted) needle *e: '

Mount in stain * acid * water '

(gently) s:uash under co+erslip * e: ' ma< 1

(b) (i) A ' !

(ii) C ' !

(c) Synthesis * di+ision * multiplication of organelles (or named organelle) '

?rowth '

Replication of ,-A* chromosomes '

$rotein synthesis * name of specific protein being synthesised '

Any normal cell acti+ities; named eg> respiration) ' ma< &[8]

7. (a) (i) Mo+ement down concentration gradient * e: '

In+ol+es protein in membrane ' &

(ii) (Acti+e transport) re:uires; AT$* energy '

(Acti+e transport) occurs against*up the concentration gradient ' &

(b) (i) (3>35 mol dm0. ) 73@ and (3>32 mol dm0. ) !5@ '

,ifference (730!5) 25@ '

allow !1@ reading; no conse:uential errorB &

(ii) Water potential of solution is more than that of red blood cells *

allow con+erse '

Water enters the cells '

#y osmosis * down water potential gradient '

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(c) Cell wall '

Resists e Same * stated mass * +olume of pulp '

.> Range of temperatures * at least three stated temperatures '

1> Same * stated +olume * concentration of enDyme * pectinase '

5> Same time * stated time period '

6> Measure +olume of uice e