specimen (ial) ms - unit 2 edexcel biology.pdf
TRANSCRIPT
Pearson Edexcel International © Pearson Education Limited 2013 Sample Assessment Materials Advanced Level in Biology
71
General marking guidance x All candidates must receive the same treatment. Examiners must mark the
first candidate in exactly the same way as they mark the last. x Mark schemes should be applied positively. Candidates must be rewarded for
what they have shown they can do rather than penalised for omissions. x Examiners should mark according to the mark scheme not according to their
perception of where the grade boundaries may lie. x There is no ceiling on achievement. All marks on the mark scheme should be
used appropriately. x All the marks on the mark scheme are designed to be awarded. Examiners
should always award full marks if deserved, i.e. if the answer matches the mark scheme. Examiners should also be prepared to award zero marks if the candidate’s response is not worthy of credit according to the mark scheme.
x Where some judgement is required, mark schemes will provide the principles by which marks will be awarded and exemplification may be limited.
x When examiners are in doubt regarding the application of the mark scheme to a candidate’s response, the team leader must be consulted.
x Crossed-out work should be marked UNLESS the candidate has replaced it with an alternative response.
x Mark schemes will indicate within the table where, and which strands of Quality of Written Communication, are being assessed. The strands are as follows:
i. ensure that text is legible and that spelling, punctuation and grammar are accurate so that meaning is clear
ii. select and use a form and style of writing appropriate to purpose and to complex subject matter
iii. organise information clearly and coherently, using specialist vocabulary when appropriate.
Pearson Edexcel International © Pearson Education Limited 2013 Sample Assessment Materials Advanced Level in Biology
72
Using the Mark Scheme
Examiners should NOT give credit for incorrect or inadequate answers, but allow candidates to be rewarded for answers showing correct application of principles and knowledge. Examiners should therefore read carefully and consider every response: even if it is not what is expected, it may still be creditworthy. The mark scheme gives examiners: x an idea of the types of response expected x how individual marks are to be awarded x the total mark for each question x examples of responses that should NOT receive credit. / Means that the responses are alternatives and either answer
should receive full credit. () Means that a phrase/word is not essential for the award of the
mark, but helps the examiner to get the sense of the expected answer.
Bold Phrases/words in bold indicate that the meaning of the phrase or the actual word is essential to the answer.
ecf/TE/cq (error carried forward)(transfer error)(consequential) means that a wrong answer given in an earlier part of a question is used correctly in answer to a later part of the same question.
Candidates must make their meaning clear to the examiner to gain the mark. Do not give credit for correct words/phrases which are put together in a meaningless manner. Answers must be in the correct context. Quality of Written Communication Questions that involve the writing of continuous prose require candidates to: x write legibly, with accurate use of spelling, grammar and punctuation in
order to make the meaning clear x select and use a form and style of writing appropriate to purpose and to
complex subject matter x organise information clearly and coherently, using specialist vocabulary
when appropriate. Full marks will be awarded if the candidate has demonstrated the above abilities. Questions where Quality of Written Communication is likely to be particularly important are indicated (Quality of Written Communication) in the mark scheme, but this does not preclude others.
Pearson Edexcel International © Pearson Education Limited 2013 Sample Assessment Materials Advanced Level in Biology
73
Qu
esti
on
Nu
mb
er
An
swer
M
ark
1(a
) C
(1)
Qu
esti
on
Nu
mb
er
An
swer
M
ark
1(b
) D
(1
) Q
ues
tion
N
um
ber
A
nsw
er
Mar
k
1(c
)A
(1)
Qu
esti
on
Nu
mb
er
An
swer
M
ark
1(d
) D
(1
) Q
ues
tion
N
um
ber
A
nsw
er
Mar
k
1(e
)C
(1)
Qu
esti
on
Nu
mb
er
An
swer
M
ark
1(f
) D
(1
) Q
ues
tion
N
um
ber
A
nsw
er
Mar
k
1(g
) D
(1
) Q
ues
tion
N
um
ber
A
nsw
er
Mar
k
1(h
)C
(1)
To
tal
for
Qu
esti
on 1
= 8
Mar
ks
Pearson Edexcel International © Pearson Education Limited 2013 Sample Assessment Materials Advanced Level in Biology
74
Qu
esti
on
Nu
mb
er
An
swer
A
dd
itio
nal
Gu
idan
ce
Mar
k
*2
(a)
Qu
alit
y of
W
ritt
en
Com
mu
ni
cati
on
(Qua
lity
of W
ritt
en C
omm
unic
atio
n –
spel
ling
of
tech
nica
l ter
ms
mus
t be
cor
rect
and
the
ans
wer
m
ust
be o
rgan
ised
in a
logi
cal s
eque
nce.
) 1.
Spe
rm c
ell {
fuse
s/eq
} w
ith e
gg c
ell (
mem
bran
e)
2.Ref
eren
ce t
o {c
ortic
algr
anul
es/v
esic
les/
lyso
som
es}
3.Id
ea o
f (c
ortic
al g
ranu
les)
{m
ovin
g to
war
ds/f
usin
g w
ith}
egg
cell
(sur
face
) m
embr
ane
4.Ref
eren
ce t
o ex
ocyt
osis
(of
cor
tical
gran
ules
/ves
icle
s/ly
soso
mes
) 5.
Idea
of co
nten
ts (
of c
ortic
al g
ranu
les)
{se
cret
ed
/rel
ease
d in
to jel
ly la
yer/
eq}
OR r
efer
ence
to
cort
ical
rea
ctio
n 6.
Idea
of
{har
deni
ng/t
hick
enin
g/eq
} o
f {z
ona
pellu
cida
/jel
ly la
yer}
OR f
orm
atio
n of
fer
tilis
atio
n m
embr
ane
7.Ref
eren
ce t
o ch
ange
in c
harg
e ac
ross
egg
cel
l m
embr
ane
Qua
lity
of W
ritt
en C
omm
unic
atio
n em
phas
is is
on
spel
ling
of t
echn
ical
ter
ms.
1.
NO
T th
e fu
sion
of
the
nucl
ei
4.N
OT
for
acro
som
e re
actio
n 5.
ACCEP
T en
zym
es/c
hem
ical
s N
OT
rele
ased
into
ovu
m
6. A
CCEP
T fe
rtili
satio
n
(4)
Pearson Edexcel International © Pearson Education Limited 2013 Sample Assessment Materials Advanced Level in Biology
75
Qu
esti
on
Nu
mb
er
An
swer
A
dd
itio
nal
Gu
idan
ce
Mar
k
2(b
) 1.
Ref
eren
ce t
o bo
th {
inde
pend
ent/
rand
om}
asso
rtm
ent
and
{cro
ssin
g-ov
er/c
hias
ma(
ta)}
2.In
depe
nden
t as
sort
men
t gi
ves
rise
to
{new
/ di
ffer
ent/
eq}
com
bina
tions
of (p
ater
nal a
nd
mat
erna
l) c
hrom
osom
es
3.
Cro
ssin
g ov
er in
volv
es s
wap
ping
of {s
ectio
ns/e
q}
of {
chro
mat
ids/
chro
mos
omes
}
3.N
OT
swap
ping
gen
es
ACCEP
T ne
w c
ombi
natio
ns o
f al
lele
s (o
n a
chro
mos
ome)
/rec
ombi
nant
s
(2)
Qu
esti
on
Nu
mb
er
An
swer
A
dd
itio
nal
Gu
idan
ce
Mar
k
2(c
)(i)
1.
Idea
tha
t te
mpe
ratu
re is
a c
ontr
olle
d va
riab
le,
e.
g. c
onst
ant
tem
pera
ture
rem
oves
thi
s va
riab
le,
so t
empe
ratu
re d
oes
not
affe
ct {
resu
lts/l
engt
h of
po
llen
tube
} 2.
Idea
tha
t (p
olle
n tu
be)
{gro
wth
/enz
ymes
/pro
tein
s/eq
} af
fect
ed b
y te
mpe
ratu
re
3.Id
ea t
hat
at t
his
tem
pera
ture
{en
zym
es/p
rote
ins}
w
ill n
ot b
e de
natu
red/
polle
n no
t de
stro
yed
at t
his
tem
pera
ture
/22.
5°C
opt
imum
tem
pera
ture
4.
Idea
tha
t th
e in
vest
igat
ion
is v
alid
1.ACCEP
T th
e id
ea o
f on
ly c
hang
ing
one
vari
able
an
d ke
epin
g al
l the
oth
ers
cons
tant
– o
r so
tha
t on
ly m
ethy
lpur
ine
affe
ctin
g po
llen
tube
s N
OT
cont
rol v
aria
ble
4.N
OT
relia
ble
IGN
ORE
fair
tes
t, a
ccur
ate,
pre
cise
(2)
Pearson Edexcel International © Pearson Education Limited 2013 Sample Assessment Materials Advanced Level in Biology
76
Qu
esti
on
Nu
mb
erA
nsw
er
Ad
dit
ion
al g
uid
ance
M
ark
2(c
)(ii
) 1.
Idea
of
{no
sign
ifica
nt/s
mal
l/1m
m/e
q} in
crea
se in
{m
ean
leng
th/g
row
th}
up t
o 0.
0001
mol
dm
-3
2.Id
ea o
f ne
gativ
e co
rrel
atio
n de
scribe
d, e
.g.
{dec
reas
e in
leng
th o
f/sh
orte
r/re
duce
d gr
owth
of}
po
llen
tube
s as
con
cent
ratio
n in
crea
sed
OR o
ver
stat
ed r
ange
fro
m 0
.000
1 to
0.0
1 3.
Idea
of
grea
test
{ch
ange
/dro
p/eq
} be
twee
n 0.
0010
and
0.0
100
mol
dm
-3/e
q 4.
Cre
dit
corr
ect
man
ipul
atio
n of
the
dat
a to
illu
stra
te
decr
ease
IGN
ORE
units
. 2.
ACCEP
T re
fere
nce
to d
ecre
ases
at
spec
ific
conc
entr
atio
ns o
f m
ethy
lpur
ine
IGN
ORE
nega
tive
corr
elat
ion
unqu
alifi
ed
3.
NO
T re
fere
nces
to
rapi
d de
crea
se
4.Som
e ex
ampl
es g
iven
bel
ow
Con
c. c
hang
e
Diff
eren
ce
(mm
) %
all
dec
reas
es
0.00
00 –
0.
0100
– m
p2
(94-
28)
66
70/7
0.2
%
0.00
01 –
0.
0100
(9
5-28
) 67
71
/70.
5 %
0.00
01 –
0.
0010
(9
5-90
) 5
5/
5.3
%
0.00
10 –
0.
0100
– m
p3
(90-
28)
62
69/6
8.9
%
(3)
Pearson Edexcel International © Pearson Education Limited 2013 Sample Assessment Materials Advanced Level in Biology
77
To
tal f
or Q
ues
tion
2 =
13
Mar
ks
Qu
esti
on
Nu
mb
erA
nsw
er
Ad
dit
ion
al G
uid
ance
M
ark
2(c
)(ii
i)
1.{L
ess/
no}
tran
script
ion/
idea
of in
hibi
tion
of R
NA
poly
mer
ase
2.{L
ess/
no}
{tra
nsla
tion/
prot
ein
synt
hesi
s/pr
otei
n m
ade/
eq}
3.Id
ea t
hat
prot
ein
need
ed f
or (
polle
n tu
be)
grow
th,
e.g.
less
pro
tein
lead
s to
red
uced
gro
wth
(of
pol
len
tube
s)
2 an
d 3
AC
CEP
T re
fere
nce
to e
nzym
e in
stea
d of
pr
otei
n.
IGN
ORE
repa
ir.
(2)
Qu
esti
on
Nu
mb
erA
nsw
er
Ad
dit
ion
al G
uid
ance
M
ark
3(a
)
Des
crip
tion
of
stag
e Ti
ck/
cr
oss
He
trie
d to
isol
ate
digi
talis
fr
om fox
glov
e pl
ants
. 3
He
test
ed d
igita
lis o
n he
alth
y hu
man
s.
×
He
used
a p
lace
bo t
o m
ake
sure
dig
italis
wor
ked.
×
No
mar
ks for
bla
nk s
pace
s.
No
mar
k fo
r hy
brid
x/3
.
(3)
Pearson Edexcel International © Pearson Education Limited 2013 Sample Assessment Materials Advanced Level in Biology
78
Qu
esti
on
Nu
mb
erA
nsw
er
Ad
dit
ion
al G
uid
ance
M
ark
3(b
)(i)
1.
Inac
tive
subs
tanc
e/no
dru
g/eq
2.
Idea
tha
t it
is u
sed
as a
con
trol
, e.
g. c
ompa
riso
n w
ith t
he a
ctua
l dru
g 3.
Idea
of
psyc
holo
gica
l eff
ect
of t
akin
g ei
ther
a d
rug
or a
pla
cebo
1.ACCEP
T du
mm
y pi
ll, s
ugar
pill
, fa
ke p
ill
3.Fo
r ex
ampl
e pa
tient
bel
ieve
s th
ey w
ill im
prov
e an
d ALL
OW
ref
eren
ce t
o pl
aceb
o ef
fect
(2)
Qu
esti
on
Nu
mb
erA
nsw
er
Ad
dit
ion
al G
uid
ance
M
ark
3(b
)(ii
) 1.
Idea
of
one
set
of p
atie
nts
bein
g gi
ven
the
(new
) dr
ug a
nd o
ne s
et g
iven
a p
lace
bo
2.N
eith
er p
atie
nt n
or {
doct
or/s
cien
tist/
eq}
know
s if
the
trea
tmen
t co
ntai
ns t
he (
new
) dr
ug o
r no
t 3.
Rem
oval
of bi
as fro
m r
esul
ts/e
q
1.ACCEP
T fo
r pl
aceb
o pr
e-ex
istin
g/ol
d dr
ug
(2)
To
tal
for
Qu
esti
on 3
= 7
Mar
ks
Pearson Edexcel International © Pearson Education Limited 2013 Sample Assessment Materials Advanced Level in Biology
79
Qu
esti
on
Nu
mb
er
An
swer
A
dd
itio
nal
Gu
idan
ce
Mar
k
4(a
) 1.
Idea
of us
ing
part
of th
e se
edlin
g 2.
Idea
of us
ing
agar
3.
(Aga
r co
ntai
ns)
grow
th s
ubst
ance
s/ho
rmon
es/e
q 4.
Idea
of us
ing
asep
tic t
echn
ique
5.
Idea
of co
veri
ng t
he t
op o
f th
e co
ntai
ner
to p
reve
nt
cont
amin
atio
n O
R lo
ss o
f w
ater
6.
Idea
of su
pply
ing
light
7.
Allo
w a
sui
tabl
e le
ngth
of tim
e fo
r gr
owth
, e.
g. 1
to
6 w
eeks
8.
Look
for
{ro
ots/
leav
es/(
com
plet
e) p
lant
} fo
rmin
g
1.ACCEP
T cu
ttin
gs,
expl
ants
IG
NO
RE
cells
unq
ualif
ied
3.ACCEP
T na
med
pla
nt g
row
th s
ubst
ance
(4)
Pearson Edexcel International © Pearson Education Limited 2013 Sample Assessment Materials Advanced Level in Biology
80
Qu
esti
on
Nu
mb
er
An
swer
A
dd
itio
nal
Gu
idan
ce
Mar
k
4(b
)(i)
1.
Perc
enta
ge o
f se
edlin
gs (
show
ing
totip
oten
cy)
decr
ease
s as
age
incr
ease
s up
to
21 d
ays/
nega
tive
corr
elat
ion
up t
o 21
day
s/eq
2.
As
age
incr
ease
s {a
fter
21/
from
21-
28/a
t 28
} da
ys
perc
enta
ge o
f se
edlin
gs s
how
ing
totip
oten
cy
incr
ease
s/eq
3.
28 d
ays
is a
n an
omal
ous
resu
lt 4.
Cre
dit
corr
ect
man
ipul
atio
n of
the
dat
a
4. S
ome
exam
ples
are
sho
wn
belo
w
Day
s D
iffer
ence
(%
)
7-28
(7
6-60
) 1
6 7-
14
(76-
56)
20
7-21
–
Mp1
(76-
40)
36
14-2
1 (5
6-40
) 1
6 21
-28
– M
p2
(40-
60)
(+
) 20
IGN
ORE
calc
ulat
ed p
erce
ntag
e of
per
cent
age.
(2)
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81
Qu
esti
on
Nu
mb
er
An
swer
A
dd
itio
nal
Gu
idan
ce
Mar
k
4(b
)(ii)
1.
{Rep
eats
/lar
ger
num
ber
of s
eedl
ings
} {a
t ea
ch
age/
in e
ach
grou
p}/e
q 2.
Mor
e ag
es o
f se
edlin
gs u
sed/
use
seed
lings
old
er
than
28
days
/tes
t 35
-day
-old
see
dlin
gs/e
q 3.
Rep
eat
28-d
ay g
roup
/rep
eat
any
anom
alou
s re
sults
/eq
1.ACCEP
T re
peat
ed t
he w
hole
exp
erim
ent
(2)
Qu
esti
on
Nu
mb
er
An
swer
M
ark
4(c
)(i)
As
phen
ol c
once
ntra
tion
incr
ease
s fr
om {
7 to
21/
7 to
14/
14 t
o 21
} da
ys,
perc
enta
ge o
f se
edlin
gs s
how
ing
totip
oten
cy d
ecre
ases
/neg
ativ
e co
rrel
atio
n up
to
21 d
ays/
eq
(1)
Qu
esti
on
Nu
mb
er
An
swer
A
dd
itio
nal
Gu
idan
ce
Mar
k
4(c
)(ii
) (A
s ph
enol
con
cent
ratio
n in
crea
ses)
at
28 d
ays
perc
enta
ge o
f se
edlin
gs s
how
ing
totip
oten
cy in
crea
ses
/eq
ACCEP
T re
fere
nce
to a
fter
21
days
.
(1)
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Qu
esti
on
Nu
mb
er
An
swer
A
dd
itio
nal
Gu
idan
ce
Mar
k
4(d
)
1.
Totip
oten
t ce
lls c
an {
give
ris
e to
/diff
eren
tiate
to
beco
me}
{an
y ce
ll/ex
tra
embr
yoni
c tis
sues
/eq}
2.Pl
urip
oten
t ca
nnot
{gi
ve r
ise
to/d
iffer
entia
te t
o be
com
e} {
all c
ells
in t
he b
ody/
extr
a em
bryo
nic
tissu
es/e
q}
3.Id
ea t
hat
only
tot
ipot
ent
cells
can
giv
e rise
to
othe
r to
tipot
ent
cells
4.
Idea
tha
t to
tipot
ent
cells
can
giv
e rise
to
an e
ntire
hum
an b
eing
, pl
urip
oten
t ce
lls c
anno
t
NO
T tu
rns
into
, be
com
e, d
evel
op in
to b
ut p
enal
ise
once
onl
y.
1.ACCEP
T sp
ecia
lised
for
diff
eren
tiate
d 1
and
2 IG
NO
RE
refe
renc
e to
em
bryo
nic
cells
/tis
sues
, ACCEP
T pl
acen
tal c
ells
/tis
sues
. 2.
ACCEP
T ca
n gi
ve r
ise
to m
ost
cells
(2
)
Tota
l for
Qu
esti
on 4
= 1
2 M
arks
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Qu
esti
on
Nu
mb
erA
nsw
er
Ad
dit
ion
al G
uid
ance
M
ark
5(a
)(i)
1.
Incr
easi
ng m
ass
incr
ease
d th
e di
stan
ce u
p to
150
g 2.
150g
to
200g
/aft
er 1
50 (
g) t
he d
ista
nce
did
not
chan
ge
3.Rel
atio
nshi
p is
line
ar t
o 10
0(g)
and
non
-lin
ear
abov
e 10
0 (g
)
4.G
reat
est
chan
ge in
0 t
o 10
0 (g
) ra
nge
IGN
ORE
UN
ITS.
1.ACCEP
T w
eigh
ts in
stea
d of
mas
ses
(2
)
Qu
esti
on
Nu
mb
erA
nsw
er
Ad
dit
ion
al G
uid
ance
M
ark
5(a
)(ii
) 1.
Add
sm
alle
r m
asse
s/ad
d 10
g or
5g
mas
ses
2.Fr
om 2
00g
/ be
twee
n 20
0 an
d 25
0g
1.ACCEP
T m
asse
s of
any
val
ue le
ss t
han
50g,
e.g
. 20
g, m
ust
stat
e un
its
(2
)
Pearson Edexcel International © Pearson Education Limited 2013 Sample Assessment Materials Advanced Level in Biology
84
To
tal
for
Qu
esti
on 5
= 9
Mar
ks
Qu
esti
on
Nu
mb
erA
nsw
er
Ad
dit
ion
al G
uid
ance
M
ark
5(b
) 1.
Two d
iffer
ent
fibre
var
iabl
es t
aken
into
acc
ount
, e.
g. le
ngth
, w
idth
, ag
e, m
ass,
hyd
ratio
n le
vel,
part
of
pla
nt e
xtra
cted
fro
m
2.En
viro
nmen
tal v
aria
ble
cont
rolle
d, e
.g.
tem
pera
ture
, hu
mid
ity
3.
Nam
ed p
roce
dura
l var
iabl
e co
ntro
lled,
e.g
. si
ze o
f m
asse
s us
ed,
rett
ing
met
hod
used
to
extr
act
fibre
s 4.
Idea
of
addi
ng m
asse
s un
til fib
re b
reak
s/m
easu
re
the
mas
s th
at b
reak
s th
e fib
re/t
hat
the
fibre
can
ho
ld b
efor
e br
eaki
ng/e
q}
5.Rep
eat
and
find
the
{mea
n/av
erag
e}
6.Ref
eren
ce t
o ac
tion
take
n in
cas
e of
{an
omal
ous
resu
lt/ou
tlier
} 7.
Ref
eren
ce t
o sa
fety
pro
cedu
re
2.IG
NO
RE
light
inte
nsity
3.
ALL
OW
des
crip
tions
of
met
hodo
logy
, e.
g. t
he w
ay
in w
hich
the
mas
ses
are
adde
d to
the
fib
re
(5
)
Pearson Edexcel International © Pearson Education Limited 2013 Sample Assessment Materials Advanced Level in Biology
85
Qu
esti
on
Nu
mb
erA
nsw
er
Ad
dit
ion
al G
uid
ance
M
ark
6(a
)Any
2 c
orre
ct for
1 m
ark.
Feat
ure
C
ellu
lose
m
ole
cule
Cel
lulo
se
mic
rofi
bri
l Alp
ha (α)
gl
ucos
e ×
×
1,4-
gl
ycos
idic
bo
nds
9
9
1,6-
gl
ycos
idic
bo
nds
×
×
Hyd
roge
n bo
nds
×
9
No
mar
ks for
bla
nk s
pace
s.
No
mar
ks for
hyb
rid
x/9
.
(4)
Qu
esti
on
Nu
mb
erA
nsw
er
Ad
dit
ion
al G
uid
ance
M
ark
6(b
)
1.Arc
haea
2.Bac
teria
Eith
er w
ay a
roun
d.
1. A
CCEP
T Arc
haeo
bact
er
(2)
Pearson Edexcel International © Pearson Education Limited 2013 Sample Assessment Materials Advanced Level in Biology
86
Tota
l for
Qu
esti
on 6
= 1
1 M
arks
Qu
esti
on
Nu
mb
erA
nsw
er
Mar
k
6(c
)1.
Idea
tha
t or
gani
sms
with
{sp
ecifi
c/pa
rtic
ular
/sha
red/
com
mon
/sim
ilar/
eq}
{cha
ract
eris
tics/
feat
ures
/tra
its e
g} a
re p
lace
d in
a g
roup
2.
Det
ail o
f ho
w c
hara
cter
istic
s as
sess
ed,
e.g.
obs
erva
ble
char
acte
rist
ics,
beh
avio
ural
sim
ilaritie
s,
sim
ilari
ties
in D
NA,
mol
ecul
ar p
hylo
geny
(2)
Qu
esti
on
Nu
mb
erA
nsw
er
Ad
dit
ion
al G
uid
ance
M
ark
6(d
) 1.
Sci
entif
ic fin
ding
s pu
blis
hed,
e.g
. in
a jou
rnal
2.
Idea
of
pres
ente
d at
sci
entif
ic c
onfe
renc
e/eq
3.
Idea
of
peer
rev
iew
4.
(Oth
er s
cien
tists
) re
peat
exp
erim
ents
(to
con
firm
or
val
idat
e fin
ding
s/te
st r
elia
bilit
y of
dat
a)
IGN
ORE
criti
cally
eva
luat
ed a
s it
is in
the
ste
m o
f th
e qu
estio
n.
3.Pe
er-r
evie
wed
jou
rnal
gai
ns M
p1 a
s w
ell
4.M
ust
be a
n in
dica
tion
of fur
ther
tes
ting
bein
g ca
rrie
d ou
t
(3)
Qu
esti
on
Nu
mb
erA
nsw
er
Ad
dit
ion
al G
uid
ance
M
ark
7(a
)X –
met
apha
se
Y –
anap
hase
Acc
ept
met
taph
ase,
met
apha
se.
Acc
ept
anna
phas
e, a
nnaf
ase.
(2
)
Pearson Edexcel International © Pearson Education Limited 2013 Sample Assessment Materials Advanced Level in Biology
87
To
tal
for
Qu
esti
on 7
= 8
Mar
ks
Qu
esti
on
Nu
mb
erA
nsw
er
Ad
dit
ion
al G
uid
ance
M
ark
7(b
) 1.
{chr
omat
in/D
NA}
cond
ense
s/eq
2.
Chr
omos
omes
{co
nden
se/b
ecom
e vi
sibl
e/eq
} 3.
Idea
of nu
clea
r {m
embr
ane/
enve
lope
} br
eaki
ng
dow
n 4.
Nuc
leol
us {
disa
ppea
rs/e
q}
5.Ref
eren
ce t
o ce
ntriol
es m
ovin
g to
pol
es o
r op
posi
te
ends
of ce
ll 6.
Ref
eren
ce t
o fo
rmat
ion
of s
pind
le (
fibre
s)
1.ACCEP
T co
iling
of D
NA,
not
supe
rcoi
ling
2.
ACCEP
T sh
orte
n or
thi
cken
5.
N.B
. pa
rt (
b) d
oes
not
spec
ify p
lant
cel
ls
(4)
Qu
esti
on
Nu
mb
erA
nsw
er
Ad
dit
ion
al G
uid
ance
M
ark
7(c
)1.
Inte
rpha
se
2.Chr
omos
omes
not
vis
ible
/nuc
leus
is v
isib
le/e
q
1.ACCEP
T/G
1/G
2/S
2.M
ust
be a
det
ail s
een
in t
he p
hoto
grap
h ACCEP
T co
nver
se,
e.g.
not
mito
sis
as
chro
mos
omes
not
vis
ible
(2)
Pearson Edexcel International © Pearson Education Limited 2013 Sample Assessment Materials Advanced Level in Biology
88
Qu
esti
on
Nu
mb
erA
nsw
er
Ad
dit
ion
al G
uid
ance
M
ark
*8
(a)
Qu
alit
y of
W
ritt
en
Co
mm
un
ica
tion
(Qua
lity
of W
ritt
en C
omm
unic
atio
n –
Spe
lling
of
tech
nica
l ter
ms
mus
t be
cor
rect
and
the
ans
wer
mus
t be
org
anis
ed in
a lo
gica
l seq
uenc
e.)
1.Id
ea t
hat
18 in
divi
dual
s is
a s
mal
l pop
ulat
ion/
smal
l ge
ne p
ool/
low
gen
etic
div
ersi
ty/m
ay h
ave
been
cl
osel
y re
late
d/eq
2.
Cap
tive
bree
ding
will
incr
ease
pop
ulat
ion
3.Stu
dboo
ks/r
ecor
ds k
ept
of b
reed
ing
prog
ram
me
/eq
4.(z
oos)
sel
ect
mat
es
5.In
ter-
zoo
exch
ange
of
anim
als
for
bree
ding
/eq
6.
Idea
of
the
need
to
prev
ent
inbr
eedi
ng
7.
Idea
of
avoi
ding
gen
etic
drift
8.
Use
of {I
VF/
AI/
use
of s
urro
gate
s}
9.Pr
oces
s fo
r m
easu
ring
gen
etic
div
ersi
ty
desc
ribe
d, e
.g.
DN
A p
rofil
ing/
eq
Qua
lity
of w
ritt
en c
omm
unic
atio
n em
phas
is is
cla
rity
of
exp
ress
ion.
ACCEP
T re
fere
nce
to ‘s
peci
es’ i
nste
ad o
f fe
rret
due
to
wor
ding
of
ques
tion.
4.M
ust
refe
r to
hum
an in
terv
entio
n –
not
just
the
fe
rret
s ch
oosi
ng t
heir
mat
es
6.N
OT
‘inte
rbre
edin
g’ in
pla
ce o
f ‘in
bree
ding
’ ACCEP
T ‘e
ncou
rage
out
bree
ding
’, e.
g. f
erre
ts n
ot
mat
ed w
ith c
lose
ly r
elat
ed fer
rets
(5)
Pearson Edexcel International © Pearson Education Limited 2013 Sample Assessment Materials Advanced Level in Biology
89
Qu
esti
on
Nu
mb
erA
nsw
er
Mar
k
8(b
)(i)
1.
(Cap
tive)
pop
ulat
ion
not
larg
e en
ough
/num
ber
of b
irth
s is
low
/eq
2.In
divi
dual
s no
t m
atur
e en
ough
/eq
3.Zoo
s pr
epar
ing
ferr
ets
for
rele
ase/
eq
4.Id
ea o
f m
aint
aini
ng a
pop
ulat
ion
in z
oos
(2)
Qu
esti
on
Nu
mb
erA
nsw
er
Ad
dit
ion
al G
uid
ance
M
ark
8(b
)(ii
) 1.
Num
ber
of b
irth
s is
ris
ing/
eq
2.In
crea
se in
pop
ulat
ion
3.Id
ea t
hat
mor
e ar
e bo
rn t
han
are
rele
ased
, e.
g. a
t le
ast
200
birt
hs e
ach
year
4.
Iden
tific
atio
n of
yea
rs w
hen
num
ber
of b
irth
s fe
ll,
i.e.
1994
or
2000
5.
Cor
rect
man
ipul
atio
n of
dat
a
3.O
r so
me
unde
rsta
ndin
g th
at t
he in
crea
ses
outw
eigh
the
dec
reas
es,
e.g.
bet
wee
n 19
9–19
99 it
in
crea
sed
by 2
30,
but
only
fel
l by
170
to 2
000
from
199
9 5.
Som
e ex
ampl
es a
re s
how
n be
low
Ye
ar
Diff
eren
ce
%
1991
–200
0 M
p3
(220
-280
) 60
(+
) 27
/27.
3
1991
–199
9 (2
20-4
50)
230
(+)
105/
104.
5 19
99–2
000
(450
-280
) 17
0 (-
) 38
/37.
8
(2)
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90
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Paper Reference
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S45356A©2013 Pearson Education Ltd.
1/
*S45356A0116*
BiologyAdvanced SubsidiaryUnit 3: Practical Biology and Research SkillsSample Assessment MaterialTime: 1 hour 30 minutes WBI03/01You must have:Ruler, Calculator, HB pencil
Instructions
Use black ink or ball-point pen. Fill in the boxes at the top of this page with your name,
centre number and candidate number. Answer all questions. Answer the questions in the spaces provided
– there may be more space than you need.
Information The total mark for this paper is 40. The marks for each question are shown in brackets
– use this as a guide as to how much time to spend on each question.
Advice
Read each question carefully before you start to answer it. Keep an eye on the time. Try to answer every question. Check your answers if you have time at the end.
Pearson Edexcel InternationalAdvanced Level
To
tal f
or Q
ues
tion
8 =
12
Mar
ks
Tota
l fo
r P
aper
= 8
0 M
arks
Qu
esti
on
Nu
mb
er
An
swer
A
dd
itio
nal
Gu
idan
ce
Mar
k
8(c
)
1.Id
ea o
f ha
bita
t as
a f
acto
r, e
.g.
loss
of
habi
tat/
wid
er r
ange
of ha
bita
ts/e
q 2.
Ava
ilabi
lity
of {
prey
/foo
d/pr
airi
e do
gs/e
q}
3.Com
petit
ion
with
oth
er f
erre
ts (
for
reso
urce
s)
4.Com
petit
ion
with
oth
er s
peci
es (
for
reso
urce
s)/e
q 5.
Effe
ct o
f ea
ting
{poi
sone
d pr
airie
dogs
/poi
son
put
out
for
prai
rie
dogs
}/eq
6.
Pres
ence
of {p
reda
tors
/hun
ters
}/ e
q 7.
Prep
arat
ion
for
livin
g in
the
wild
impr
oves
cha
nce
of s
urvi
val/
if re
liant
on
hum
ans
wou
ld n
ot s
urvi
ve
8.Id
ea o
f to
o fe
w t
o be
a v
iabl
e br
eedi
ng p
opul
atio
n 9.
Idea
of
pres
ence
of di
seas
e
Fact
ors
may
eith
er im
prov
e or
red
uce
surv
ival
ch
ance
s.
1.Clim
ate
chan
ge c
an b
e ac
cept
ed h
ere
as a
fac
tor
affe
ctin
g av
aila
bilit
y of
sui
tabl
e ha
bita
t ACCEP
T de
scri
ptio
n of
hum
an a
ctiv
ity t
hat
coul
d le
ad t
o lo
ss o
r ga
in o
f ha
bita
t
3.In
tras
peci
fic c
ompe
titio
n
4.In
ters
peci
fic c
ompe
titio
n 7.
For
exam
ple,
kep
t in
sem
i-w
ild c
ondi
tions
initi
ally
an
d hu
ntin
g be
havi
our
enco
urag
ed
(3)