gce o level 2008 biology 5094 5100 paper 1 solutions
TRANSCRIPT
Page 1 of
GCE O
# An1 A
2 A
3 D
4 D
5 B
6 C
7 C
8 C
9 B
10 D
11 B
12 A
13 B
14 C
3
Level Oct
ns WorkinXylem veand disso4 – riboso1 – protefrom memproducedActive traconcentraThereforethan that The greatFor bloodaround thFat (lipidDigestionpresence working Lacteal aHepatic pcontains Hepatic vglucose fPalisade cell in thesucrose, bEnzyme wtemperatuoptimumTranspira(in leavesWater vaCompaniprovide eAs tempeplant dowAs air gediffuses oCoronaryand dissosufficientmuscle co
by
/Nov 2008
ngs/Remaressel is a holloolved mineral some on rough in products (sumbrane of golgd in the cell, anansport is a proation to a regioe, to absorb suboutside cell. test difference d to be pumpedhe body. d) is made up on of protein (e.of HCl, by thepH of protease
absorbs fatty acportal vein is thall the nutrientvein is the bloofrom the blood mesophyll (B)e leaf that is clbut not starch. works best at oure denatures e
m temperature, aation is the losss) and lenticels
apour moves thion cells functienergy for activerature increasewn. ets drier (lower out at a faster ry arteries carry olved nutrientst ATPs (due toould not work
y exampape
8 Biology 5
rks ow tube (absencsalts. endoplasmic re
uch as enzyme)gi bodies (3) wnd to secrete theocess by whichon of higher cobstance by acti
in concentratiod by the heart,
of one glycerol g. egg-white) t
e action of enzye is about that ocids and glycerhe blood vessets (such as glucod vessel that d
supply for its ) layer containslosest to the sun
optimum tempeenzyme. Thereand zero at higs of water vapos (in stem). hrough stomataioned to producve transport of es, rate of wate
r water potentiarate. blood to cardi
. If blood flowo the lack of ox
properly (coro
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5094/5100
ce of protoplas
eticulum is the) released from
whose purpose aese outside theh substances aroncentration, wive transport, c
on would requwater must be
and three fattytakes place in tyme protease. Tof HCl. rol. l that drains blcose) that havedrains blood frocellular energys the most numnlight. Phloem
erature. Low teefore, rate of regh temperature.our from the in
a via diffusion.ce ATP (by hav
f food substancer vapour loss
al), water vapo
iac (heart) musw is partially bloxygen and dissoonary heart dise
exampaper
0 Paper 1 S
sm) to allow fo
e site for proteim secretory vesare to modify ae cell. re transported f
with the expendconcentration in
ire the most enincompressibl
y acids molecuthe stomach, anTherefore, this
lood from digee been absorbedom liver, whichy production.
mber of chloropm (D) transports
emperature inaeaction is low a. nternal tissues i
ving a large nues in phloem sincrease, carry
ur in the leave
scle, supplying ocked, the cellsolved nutrientsease).
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Suggested
or ease of transp
n synthesis icle (2), which
and store chem
from a region oiture of energynside cell has t
nergy. le so that it cou
ules. n acidic enviros implies that o
stive system. Id from the smah would have t
plast because it s sugar in the f
activates enzymat low temperat
in plant throug
umber of mitocsieve tube cellsying latent heat
s (higher water
cardiac cells ws could not pros) and therefore
rights reserve
d Answers
port of water
h pinches off mical products
of lower y. to be greater
uld circulate
onment due to optimum
t therefore all intestine. taken up
is the layer of form of
me while high ture, highest at
gh the stomata
chondria) to s. t away to cool
r potential)
with oxygen oduce e the heart
d.
s
f
t
Page 2 of
15 C
16 D
17 C
18 B
19 A
20 C
21 C
22 C
23 A
24 B
25 D
26 C 27 B
28 C
29 B 30 C
3
Group B in the bodGroup O foreign su*AntigencharacterAt W, as closes to At X, semin aorta. At Y, sempressure At Z, leftthrough tZ: Enzym
Cell X copharynx. Diaphragincreaseslungs. ExcretionmetabolicDialysis diffuse oublood. Homeosteffector wWater copH in duoalkaline i Ciliary mto becomIris radiaprevents light-sensDorsal roRelay neuKidney isPollen grovule (4)Anthers mthe air whLight polGaseous One sperCell divis
by
contains anti-Ady. contains anti-Aubstances in th
n maybe proteinrizing the bloodpressure in lefprevent backfl
mi-lunar valve
mi-lunar valve in left ventriclt ventricle is rethe opened bicume carbonic an
ontains cilia, w
gm muscle cons volume of tho
n is the removac waste producfluid flowing iut down the co
tatic control invwhich brings abontent in ileum odenum is kepintestinal juice
muscles contracme more convexal muscles relax
too much lightsitive retina fro
oot ganglion is uron is found is an osmoregulrains (male gam). must be held ouhen wind blowllen grains couexchange take
rm and one eggsion that occur
y exampape
A antibody, wh
A and anti-B ahe body. n, carbohydratd type. (i.e. Grft ventricle incr
flow of blood inopens as blood
closes as left ve) to prevent b
elaxed (low preuspid valve.
nhydrase cataly
which sweep du
tracts causing oracic cavity an
al of metabolicced by respiratin should not co
oncentration gr
volves a receptbout a correctiis dependent o
pt relatively con.
ct, reducing thex. x and circular mt from enteringom damage bycharacterized
in grey matter olatory and excr
metes) are foun
utside of flowews. uld be easily bloes place in placg fuse together rs in growth is
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hich would atta
antibodies, whi
te etc moleculeoup B containsreases due to cnto left atrium d flows into ao
ventricle starts backflow of bloessure), causing
yses this reactio
ust particles tra
the diaphragmnd decreases th
c waste production reaction inontain urea so radient, thus rem
tor which detecive measure, enon the volume nstant by mixtu
e tension in the
muscles contrag the eyes in ve strong light. structure of senof spinal cord.retory organ. nd in anther (1)
er so that polle
own away and centa.
to form a zygomitosis, which
exampaper
ack type A anti
ch would attac
e found on the ss type B antige
contraction of lfrom left ventr
orta from left v
to relax (as indood into left veg the blood to f
on.
apped in the mu
m to flatten and he pressure in t
ts from the bod cells. that urea frommoving waste
cts the change nsuring the conof water intakeure of acidic ch
e suspensory lig
act, reducing thery bright light
nsory neurons.
) and eggs (fem
en grains could
travelled a fur
ote. h produces gen
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igen as a foreig
ck type A and B
surface of red ben) eft ventricle, bricle. entricle, increa
dicated by decrentricle from aoflow from left
ucus up the trac
move downwathe lungs. Air f
dy. Carbon dio
m patient’s blooproduct from p
against the nornditions remaine. hyme from stom
gament and cau
he size of pupilt condition, pro
.
male gametes) a
be easily carri
rther distance a
etically identic
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B antigens as
blood cell,
bicuspid valve
asing pressure
reasing orta. atrium
chea into the
ards. This flows into the
xide is the
od would patient’s
rm and an n favourable.
mach and
using the lens
l. This otecting the
are found in
ied away in
away.
cal cells.
d.
Page 3 of
31 A
32 B
33 B
34 B 35 B
36 C
37 A
38 C
39 B
40 C
3
HomologrelativelyProphasemicroscoTelophasdaughter microscoGamete c
Prophasei) Biii) Ch
eaciii) Ge
chrMetaphasequatoriaof maternFertilizat
RestrictioDominanalleles arRecessivdifferent There is oon to the IA and IB
Blood groenvironmNatural sto continu2- Those maturity.3- Organ4- Differe6- SurvivIf flowerbe develoBats wouThe transheat, wasThereforeorganism
by
gous chromosoy similar structue: Chromatin coope. se: Chromatidsnuclei. The ch
ope. contains a hapl
e I of meiotic dvalent formatio
hiasmata formach other makinenetic crossingromatids at these I of meiotic al plate of spindnal and paternation – fusion of
on enzyme cutsnt allele only mre present in thee allele only malleles are preonly one type ooffspring. are co-dominaoup and gende
mental factors. selection: Natuue in its survivorganisms tha
. nisms that survient organisms
val of the fittess were not polloped into fruit.uld be most affsfer of energy fste etc. e, an organism
ms from previou
y exampape
omes are a pair ures. ondenses and b
arrive at oppohromosomes di
loid set of chro
division – on – two homoation – non-sistng contact at seg over – the bree chiasmata, redivision – orie
dle is independal chromosomef sperm and eg
s DNA molecumeans the trait i
e same cell. means the trait i
sent in the samof allele (IA) pr
ant, while IO is rer are fixed at b
re selects thoseval and reproduat could not ada
ived reproducepossess differet. linated, fertiliz
fected as fruit ifrom one troph
m from successius trophic leve
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of chromosom
becomes visibl
osite poles of ceisperse and are
omosomes.
ologous chromter chromatids everal points (ceakage and rejosulting in exchentation of eacdent of other paes into daughtegg is a random p
ule at the restriit encodes is ex
it encodes is nome cell. resent in blood
recessive. birth. They do n
e organisms, wuction. apt to changing
e and pass on thent genes, and
zation would no
s its only food hic level to the
ive trophic level to achieve su
exampaper
mes, one from e
le as chromoso
ell and new me no longer visi
osomes paired of homologou
chiasmata) alonoining betweenhange of genetih homologous airs. (i.e. there
er cells) process
ction site into fxpressed in phe
ot expressed in
d group A hom
not change ove
which are better
g environment
he favorable getherefore diffe
ot take place. T
source. next decreases
el has to feed oufficient energy
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each parent, tha
omes under the
embranes formible under the l
d up us chromosomeng their lengthn the two non-sic material pair of chromois independent
fragments. enotype when t
n the phenotype
ozygote. This w
er time due to v
r adapted to the
died before the
enes to their oferent adaptation
Therefore, ovar
s due to the los
on a large numby.
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at have
light
m around the light
es twist around. sister
osomes on the t assortment
two different
e when two
will be passed
variation in
e environment
ey reach
ffspring. ns.
ry would not
ss in energy as
ber of
d.
d