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Emi
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y Summer
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AS OCR Biology Revision Pack

UNIT f211 Cells, exchange, transport

Module 1 Cells

Cell Structure
1. Stat
e t
he r
esolut
ion
and
magnif
icat
ion
that
can
be
achi
eved
by
a l
i
g ht
mi
croscope,
a
tr
ansmi
ssi
on…

Page 2

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Emi
l
y Summer
s





5. Out
li
ne
the
funct
ions
of
the
str
uct
ures.





Picture Description Function

La r
ge and contai
ns N ucl
eus contai
ns t
he
chromati
n. Encl
ose d
by a cel
l'
s genet
ic
ma t
erial
.
nu…

Page 3

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Emi
l
y Summer
s




Enzyme s br
e ak
dow n
Sp her
ical
sacs cel
ls.
E.g.
wh i
te
blood
surr
ound ed
by a si
ngle cel
l
lyosome s
break
me mb r
ane, wi
th no
clear dow n
invadi
n g
i
nter…

Page 4

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Emi
l
y Summer
s





T hi
ck
layer
,
in
plants.
Gives
the
cell
st
rengt
h
Made of
cel
lul
ose i
n and r
igi
dit
y
eukar
yoti
c cel
ls
and
mur
ein
in
prokar
yo t
ic
cel
ls.


I
t
separates
the cel…

Page 5

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Emi
l
y Summer
s





Rigi
d t
ail
t
h at
r
otates.
"The Propel
s t
he cel
l

mo t
or
is
e mbed ded i
n t
h e
cel
l
me mb r
an e and
is
+
dri
ven by a
H gr
adient…

Page 6

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Emi
l
y Summer
s


















Cell Membranes

9. D escr
ibe,
wi
th
the
aid
of
diagr
ams,
t
he
fl
uid
mosai
c model

of
membr
ane
struct
ure




10.Descr
ibe
the
rol
es
of
the
component
s of
t
he
cel
l
membr
ane phosphol
ipi
ds,
chol…

Page 7

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Emi
l
y Summer
s







12.Expl
ain
the
ter
m cell signalling.

Cel
l
Signal
li
ng
H ow cel
ls
communi
cat
e wi
th
each
other
,


One cel
l
rel
eases a
me ssenger
mo l
ecul
e
(e.
g.
a hor
mo ne)

The
mo l…

Page 8

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Emi
l
y Summer
s




Di
ff
usi
on t
he movement
of
par
ti
cl
es
fr
om
an
area
of
higher
concent
rat
ion
to
an
area
of
l
ower
concent
rat
ion

Faci
l
it
ated
dif
fusi
on
uses
car
ri
er
and
channel
pr
otei…

Page 9

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Emi
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Cell Division, Diversity and Cellular Organisation




9

Page 10

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Emi
l
y Summer
s





Expl
ain
the
meani
ng
of
the
ter
m homologous pair of chromosomes

Huma ns
have
46
chromosome s
in
tot
al
23 pairs.
One chr
omo some i
n each
pair
comes
f
rom t
he
mother,
and
then
the
other
come s
fr…

Comments

isha8362

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That was very useful...thanks :) 

LauraJones7

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This is the chance I'm gonna get to learn all this so I'm just gonna learn everything my self because my school doesn't help, thankyou for putting this up:)

LauraJones7

Report

This is the only chance I'm gonna get to learn all this so I'm just gonna learn everything my self because my school doesn't help, thankyou for putting this up:)

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