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Section# 1

Q8.The diagram shows a typical bacterium, with parts labelled P, Q, R and S.

...............................................................................................................................

...............................................................................................................................(1)

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(a) (i) Which part is made from DNA?

...............................................................................................................................(1)

(ii) Which part is the cytoplasm?...............................................................................................................................

(1)(b) Lactobacillus are bacteria that are used to make yoghurt. The table lists four stages,1, 2, 3 and 4, and a description of what happens at each stage in the production offruit-flavoured yoghurt.

(i) Suggest why stage 1 is needed.

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...............................................................................................................................(1)

(ii) Why must the milk be cooled during stage 2?

(iii) Explain why the mixture is kept at 40 °C for several hours during stage 3.

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...............................................................................................................................(2)

(iv) Suggest why fruit is sterilised before being added to the yoghurt.

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...............................................................................................................................(2)

(Total 8 marks)

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Q16. The table gives descriptions of some biological processes.Complete the table by giving one word for the correct name of each process. le first one has been done for you.

Descl"prion of process ame of process

remova1 of tox.ic waste from the body excretlon

lsion of ma1e and female g te<;

e aporation of water from the leaves of a plant

mnta mgac tant level of substances in ebody

growth of a plant shoot towards light

tn easing the diameter of small art les

adjustments made by e eye to produce a clear image on the retina

(TotaI 6 marks)

8. (a) (i) (ii)

Q;P;

(b) (i) (ii)

kill bacteria I remove I get d of I pasteu se I sterilise;(added) bacteria not killed / not denatured / eq;

(1)(1)

(iii) optimum / best I ideal I eq;for enzymes;for bacteria to reproduce;for lactic acid production; enough time to make yoghurt;maximum of 2 (2)

(iv) killlremove I get d of I bacteria I eq;so yoghu not spoiled I contaminated / eq; (2)

Total8 marks

16. Description of process Name of process

removalof toxic waste from the body (excretion)

fusion of male and female gametesfertilisation;

evaporation of water from the leaves of atranspiration;

plantmaintaining a constant levelof

homeostasis;substances in the bodygrowth of a plant shoot towards light

(photo)tropism;

increasing the diameter of small arteries (vaso)dilation;

adjustments made by the eye to producea clear image on the retina

focusing I accommodation; .a

(6.).

Total6 marks

Q1 . Living organisms can be put into major groups based on common features that they share.le table below shows some main groups of organismssome of their features and someexamples of each.Complete the table to show the co ect groupstwo features of each group and one example of an organism in each group.

Group Features Example

: mals

multice11ular

2 do not contain cWoroplasts

bacteria2

P aS1 1c

2 on1y reproduce inside living cells

tobacco mosaic

(fotal 5 marks)

Marks scheme

(5)

Total 5 marks

human / eq j

single celled;lack nucleus;

Lactobacillus / eq;

V1rus;

2.

DifIerent pes of cells may contain diff ent structures.

C lplete the table to sho\V e StnlClfes contained in edif rent cells. Ifthe cellcontains: e stmcture put a tick ()e box. Ife cell does not contain thestruct1.e put al cross ).

So e have been done for you.

CellStruc lre

udeus Cytoplasm Cell wall CWoroplast

neurone( imal cell)

J

PnelO1l0COCCUS

(a bacterial cell)J lC

yeast(a ftUlgal cell)

J

(Total 4 marks)

Marks scheme

CellCetl structure

nucteus cytoptasm cett watt ch t oroplast

neu rone(an animal cell}

./ (./) JC JC

Pneumococcus(a bacterial cell)

x J (./) (

yeast(a f u ngal cell)

(./) J J x

1 ma rk per pair of correct answers in each column.

Tota t 4 marks

Q1.

Living organisms have c in characteristics in common_ The table giv dpti 0n5

of someof e characteristics.

Complete the table by f1ng in the gaps.

m

..

σotal... marks)

Cba ractel'istic DesCliption

movmg not sta the mepla

αetulε

tn -easing in size and mass

ge

f roducing

Marks scheme

QuestionNumber

Questi on

1Acceptable Answers Mark

(4)Total 4 marks

Process Desc

removing waste products

s;;!rowms;;!

resplrlngj

producing young /eq

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Q 1. The table shows some characteristics of different types of organism.Complete the empty boxes in the table by giving an example of each type of organismand by writing the word YES or NO to show whether the type of organism is multicellular ornot.Some of the boxes have been completed for you.

Type of organism Example Iulticellular

plants YES

anima1s

bacteria Lactobacillus

\"uuses NO

(Total marks)

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Marks scheme

)(Total 5 marks)

Questi onNumber

Correct Answer AcceptableAnswers

Reject Mark

Type ofrgamsm

Exampl e Multicellular

pl ants mai ze I eq;animals human I eq; YES;bacteria NO;Vlruses influenza I

HIV I AIDS ITMV I eq;

Q1. The drawing shows a piece of bread. The bread is going mouldy because a fungus isgrowing and feeding on it. When the fungus grows it produces many threads (hyphae) that spread over the bread.

C .............................................................................................................................

D ............................................................................................................................(4)

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The hyphae secrete enzymes that digest the bread. The products from this digestion are then absorbed by the fungus.

(a) The diagram shows a magnified view of a single hypha from the fungus.

(i) Name the parts labelled A, B, C and D.A .............................................................................................................................

B .............................................................................................................................

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(ii) Complete the table to name the type of enzyme secreted by the fungus and the products of digestion.

1"ame of enzyme secreted by fungus Product of digesrion

maltose

protease

tty acids and glycerol

(3)

(b) The passage below des ibes e part played by fungi in e carbon cycle. Complete . e passage by choosing a suitable word or \.\'o 1"ds to write on the dotted lines.

Many fungi are decomposers and play an important part in the carbon cycle.

Decomposition is e ....

f dead organ.istmor

rgω.

ic materialsuch as bread. The process releases

inorganic mineral ions. lC h as .

into the soiL Decomposition also releases a gas called

int e r. This gas is

produced by a process called

which releases e en gy at fungi need to grow. τbe s ne gas is

taken ut of e r by plants and

used in a process called

. to make food (5)

(Total 12 marks)

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QuestionNum ber

Correct Answer Notes Ma rk

1 (a ) (i) cell wall;cytoplasm;nucleus;vacuole;

(4)

)

)

(Total 12 marks)

QuestionNumber

Correct Answer Notes Mark

1 (a) (ii) amylase / carbohyd rase;ami no acids / polypeptides / peptides;lipase;

(3

QuestionNumber

Correct A nswer Notes Mark

1 ( b) digestion / brea kdown / decay / eq;nitrate / phosphate / other named mineral lon;carbon dioxide;respiration;photosy nthesis;

(5

1. The table lists reedifferent S oforg ism.The organisms may or may not containIcertam s uc lfes.

ωmplete the table to show the stI1lCtures ntained in the d :rent organisms. lf e'organism cont nsthe UCnlfe put a tick(1)in theboxIftheo anism does not lthe stI1lc re put a cross(lC).

Some have been ne for you.

Ol'gauismStruc1('(>

cbloroplasts cytoplasm ('('11 wall nucl('us

fungus J

bacterium )c J )c

VlfUS =ι x

σ'0tal -' marks)

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Answer Ma rk

rgamsm

st ructu re

chloroplasts cytoplasm cel l wall

n ucleus

fungus X /: (1)

bacterium (X) /; (/) (X)

Vl rus X:P

(X) (X) X:

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(2)

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QuestionNumber

Answer Mark

1(a) nutrition / feeding / eq;reproduction / eqi (2)

Questi onNumber

Answer Mark

1(b) removeiwaste / toxins / poisons / harmfulsubstances / eq; (2)

(Total 4 marks)

Q 1. The list gives five different types of living

organism. plants animals fungi

bacteria ;"}flses

The table lists features of1iving organisms.Complete the table by writing the correct type ofliving organism that has the feature.The first one has been done for you.

FeatulP Tyof lhing o l'ganism

bave cellulose cell walls plants

all are par itic and have a protein coat

are miαoscopic and contain circular DNA

s le have structur lled hypbae

115 bave a nudeus but no ce11 wall

σ'ota1.t m.uQuest10nNumber

Answer Mark

(4)

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7. The5 gede rib eway in which al Ihol is made by a fungus during fueprod tion of 1>

Write the dotted lin e most suitable word or worlto

mplete ep sage. Most ftmgi are ma om read-like

uctures called . ......

and have .................................................... made of chitin.. They a1so have 10ts of the

org elle called a ................. .......10 q opJasm. The fuus

used to make beer is single-celled and called ........

This fun15 l1 ses a pr ess called .. .. .. ...... .. .. .. respirati to

conv t a sugar called .... .. .................into ethanol and a g

Ued ...

(Total 7 mark )

Feature Type of livi ng organhave cellulose cell walls (pl

all are parasitic and have a proteincoat

vlru

are microscopic and contain circularDNA

bacteria;

some have structures called hyphae f u

cells have a nucleus but no cell wall animals;

QuestionNumber

Answer

7 hyphae;(cell) \"/alls;nucleus / mitochondria / ribosomes / eq;yeast; anaerobic;glucose;carbon dioxide;