8/10/2019 cape Bio Unit 2 2008

1/10

8/10/2019 cape Bio Unit 2 2008

2/10

c

_ 1..

Under anaerobic. conditions, the pyruvic acid

produced by a respiring muscle cell can be

hem S refers to the Krebs cycle shown

below.

~

~

'

~,\.,'~'

.,

l.

H.

nl.

IV

\ A)

(H)

(C)

'T'.'I..J}

oxidizedtc, carnon&oxidc and water

used to regenerate NADH

converted to lactic acid

decarhoxylated to fonn acetyl CoA

moaly

U and manly

I. III and IVonly

II, II! and TVonly

,/ ~p ~ Acetyl I;ocnz.yme A

r-i/ ' "",~LIJ' ,~~'> .l>~o.::zynWA

Kre'bs .',Cycle , 'X; h

)"---..0> CO,

" .-~C~/ .'.

l~

.~,..,...

How many carbon atorilS arC' represented. at.Xand Y respectjvely?

7. The tinal product(s) :Jfglycolysis is/are

(A) acetyl coenzyine A

(E) reduced NADH

, (C) ft:1'P,NADarldpyruvate

'(Dj~ pyruvate,ATP andNADH

s.

CA) .(B)

(C)

(D)

4C and 5C

5C and4C

6C and4C

6C and 5C

9. \\'hich of the following describes an ecosystem? '..,

\ (.A)\ .\

,,)B)

(e)

.(D)

Producers + consumers + decomposers + non":living component

Producers + decomposers + habitats + non~living componentProducers + consumers + habitats + non-living componentConsumers -t- decomposers + habitats + non:..jiving component

10. Tne table below shows the estimated energy content for the trophic levels of a

grassland.

--Levels Enef'gy content/ kJm-2

1----.

Producers 5600Herbivores . 125

. .Omnivores 15

.

Carnivores 10

"0;,

.'

"

Vvhich afthe following indicates the percentage decrease in energy between

producer and herbivore?

(A)

(B)

(e)(D)

0.0022%

0.022%

0.22%'1 ")VI....../0

8/10/2019 cape Bio Unit 2 2008

3/10

'!>;" .~.:

~.

~.

I-4-

~~

"

u.

n.

Which sequence correctly represents the

action ofnitrifying bacteria?

'(A) ~-mnonium -t nitrite --10 nitrate

(B) Nitrogen -t nitrate 4 nitrite

(C) Nitrate -+ ammonium -tmtrogen(D) Nitrite -t nitrate -r ammonium

Item 12 ~fers-to the diagram below.

Carnivore 3

i . Can>!v~l

CarnIy~l iHerbivo l /

~. producer.

'Whatfactorother than sunlight would makethis a self-sustaining ecosystem?

14.

15.

16.

The term 'biodiversity' is BEST described as

(A) the number of species on earth(B) the variety ofdifferent life forms on

earth.

ee) the range of genera on earthCD) the range of ecosystemson earth

The creation of seed banks is an economical

method of maintaining plant diversity.

Preparation of material for storage involves

I. reduction of the moisture content of

the seeds v

II. selection of the best se--As.

m. planting the seedsIV. freezing the seeds

(A) IV only(B) I and II only

(C) n andm only(0). I, II andIVonly

The diagram below shows three adjacent

plant cells I,n andm. The values of theirwaterpoten.tials are given in kPa.

(A) Producers(B) Primary consumers(C) Higher'orderconsumClS

(D) Decomposers

13~ Whichoftbe followingecologicaltenn.srefers

to only one species?

'(A) population(B) Community

(C) Foodcbain

CD) Producer

1 n nI

In which direction would there be a NETflow?

(A) I -+ n andU -+ III(B) . n -+ I andm -+ I(C) n -+ !II and II ~ I(0) .m -+ II and 1 -+ II

.~

8/10/2019 cape Bio Unit 2 2008

4/10

Ucr;! 17 rcfer tv 4 stag::s ir, the ioss of water

fro:n the stem to th.e atmosphere, down a

"'r.Ci::;;- pol.~ntialgradient.

1..fenorvena cava is represented by

y

Figure 18a

-{

(A) i,11,III, IV

(B) t, II, IV, III

(C) II, I, IV, III

(D) IV, III, II, I

Item f8 refers to the darkly staining

materiallabeHed X in Figure 18a which is

often found blocldng Sturcture Y in Figure

:8b.

~F!gure 18b

What is the identity of X?&.

tA) Callose

(B) Lignin((:) Cellulose(P, ~t

8/10/2019 cape Bio Unit 2 2008

5/10

~ '-"

-6-

Which of the following is the correct sequence of events in a single heart beat mown as the

cardiac cycle?I

22.

- -CA) -

(BJ

(C)

--(D)

Atrial systole -7 ventricular systole ~ atrial diastole -+ ventricular diastoleVentricular diastole 4 atrial systole -+ atrial diastole ~ ventricular systoleAria! diastole -* atrial systole -? ventricular systole ... ventricular diastoleVentricular systole ~ atrial systole ~ atrial diastole ~ ventricular diastole

Item 23 refers to thefollowL'lg table showing the distribution of blood volume, presSW"e and velocity in

a human!s vascular system.

Volume Iem' Pressure ImmBg Velocity Iem so}

A 100 100 I 40B SO 30 5

,C 2200 10 0.3

D 300 Z , 18

23. ~ Vlhich set of data corresponds with those for the vena cavae?

Item 24 refers to the follo,",ing diagram. 25. Which combination below shows how

positive feedback affects it

change in outputand the directional flowofanimpulse?

24. The cell labelled ~ in the diagram above is

~ ~ O.~ 'b1 C..)

d>

(('t The outcome of an increase L'1 insulin

production is

an increase in cell permeability to

glucosea ftll) in glucose conversion to

glycogenan increase in blood glucose sugar

levelsan increase inconversion of glycogen

to glucose conversion

pireetionaJ- flow

samedireetion

opposite direction'110directionsame direction

Output

(A) Large

(8) Small(C) Large(0) Small

(A)

(:8)

(C)

(D)

26.

an erythrocyte

a platelet

a monocyte

a neutrophil

(A)

(B)

(C)'(D)

;:::;...

8/10/2019 cape Bio Unit 2 2008

6/10

8/10/2019 cape Bio Unit 2 2008

7/10

8/10/2019 cape Bio Unit 2 2008

8/10

8/10/2019 cape Bio Unit 2 2008

9/10

/.' '..

. ' .r

, ...

41.

- 10 -

A professional athlete and an untrained individual each engaged in 10 minutes of exercise. Theathlete's blood pressure, pulse and breathing rale remained almost unchanged while the un-trained individual experienoed an increase jll aU three parometers. Which of the followingaocounts for this?

'

8/10/2019 cape Bio Unit 2 2008

10/10

. 1 I

I

Item ~s refers, La the table below showing three' components of wbneo smoke,X. 'y' and Z and their effects.

.. \"f~.. ..J..,.. . ~,

~ ::

Pn')lTIo!'es lung

I~~l~c~r

ln~reuses ;;ecretionofm\.lc~s

Thickens lungtissue::

,....-..-.---~. --.-.-._.1

I X i Yi Constricts arterioles I Combines" withi I haemoglobillI St.im\llat. l;:S reJf;l:lSe of I. D~creas~.s leve.ls ofI adrenaltne oxygen in blood

In.~~reas0s.,'.stickiness' j I D.il0ages the lining01vlatelms of anenes

. I

r

z ---- - ....--;

I

I

4:;. \Vhich or tbe following rorrecdy id~ntjfks X, y~nd. Z?

I= X. -I :.~. -~. . i ~I --'1=- --- : - :~,='-~~--~----I (/l-.).. _I T.u- ,,~icotin~ Cat'pon mopmdde1 CD) Tar ICwpcm monoxide Nicotine iI (C)' r~iCOtinc' Cal'bun mono~i(;i~ Tar"-ICD) - -N~nel'rar_: I Carbon monoxide

KFYOUFII\HSH BEF'ORETlL!'\1EIS CALLED, CHECK YOUR \VOF.K ON TillS TEST.

v/

l

-----------------------------------------------

I

II

)