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TAJUK : Movement of substances across plasma membrane

!UBTAJUK: Movement of substances across "n plasma membrane

SOALAN OBJEKTIF:

1. Cell membrane is made up of

A Lipid bilaer and pro!einsB "ro!ein bilaer and p#osp#olipidsC "ro!ein bilaer and lipid monolaer$ Carbo#dra!e monolaer and pro!ein bilaer

%. i'# of !#e follo(in) are !#e 'omponen!s of 'ell membrane*

I +l'opro!eins II Carbo#dra!e III +l'olipid

I, "#osp#olipid

A I and IIB III and I,C I- III and I,$ I- II- III and I,

. Amon) !#e follo(in) fa'!ors !#a! (#i'# limi!s !#e si/e of !#e '#ee0 'ell in (a!er is

A a!e of diffusionB T#e presen'e of nu!rien!sC S!ren)!# of !#e 'ell membrane$ T#e abili! !o pre2en! absorp!ion of (a!er

3. T#e pro'ess !#a! re4uired ener) is

A OsmosisB $iffusionC A'!i2e !ranspor!$ "assi2e !ranspor!

5. i'# of !#e follo(in) s!a!emen!s is trueof a'!i2e !ranspor!*

A A'!i2e !ranspor! is re2ersibleB A'!i2e !ranspor! re4uires ener)C A'!i2e !ranspor! in'ludes osmosis and diffusion$ A'!i2e does no! in2ol2e a 'on'en!ra!ion )radien! of subs!an'es

6. T#e pro'ess b (#i'# o7)en is released !o !#e a!mosp#ere 2ia !#e s!oma is

A OsmosisB $iffusionC E2apora!ionD Transpiration

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SOALAN ST8KT8:

1. $ia)ram 1 is a model of 'ell membrane proposed b Sin)er and Ni'olson in 19%.

$ia)ram 1 a; a! is !#e name )i2en b Sin)er Ni'olson for !#ius model *

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?ii; a! is !#e 'on!ribu!ion of " !o and *

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?b; Name t#o !pes of !ranspor! pro!eins.E7plain ea'# of !#e !ranspor! pro!eins.

=3 marks>?'; $es'ribe !#e similari!ies and differen'es be!(een a'!i2e !ranspor! and fa'ili!a!ed

diffusion. = marks>

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