CXC CSEC Human and Social Biology June 2015 P1

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Microorganisms are an importan! -qart.of cvcle' Which of the following nitrate *i"roorg*isms contribute directly to build-uP in a soil?

get Ttie Drocess by which living otS"anisms , energY from their fobd is

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(A) nutriJiott ffi) (91 ronFlrQtleR F[ofFtlflR (p) growth

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Nltrtfvlns hnercrlFl .

iiji Denlti'lfflns bBPfPne ici .' SaproPhYtic tungibacteria iPi

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Nitrogen-fixing

Wni.n of the following organisms have

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"lU"iot"

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walls

as part of

their structure? 6.

Plants

(A) igj ici (D)

'Bacteria

I and II onlY I and III onlY II and III onlY I, II and III

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.(B)

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i(c)

;.(D)

the amount of water moleculqs is bqualized on both sides the hydrostatic press.rire equals the osmotic Pressure the ssmotic Pressrue equals the osmotic Potential hrrgidity and flaccidity are equal

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4.

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amount

of

energy

in food chains

:"The decreases at each trophic leve:l:because

Chicken souP Vegetable rice and fish Fruit and vegetable salad Wheat bread and cheese

Which of the following reagent'3 gives a positive test for the main food present in a slice of baked'Potato?

of water ,Duriqg osmosis, the movement j.molec-ules through the semi-permeable 'membrane continues until i

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Whicli of the following foods would BEST prevent constiPation?

Fungi

(A) G) (C) (D)

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(A) (B) . (C) (D).

Biuret Etha$ol Iodine solution Benedict's solution .

8.

Kwashiorkor by a lack of

(A) (B) (C) (D)

i'-s.a

deficiency disease caused

fats Proteins glYcogen

carbolYdrates

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there are less organisms resPiration occurs the organisms are more active

I and II onlY I and III onlY II and III onlY

: (n) (C) I (O) I,II and III

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$p!!referstothefollowingdiagramwhich'' .i

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shows the stnrchre of a typical tOoth.

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enzyn0es?

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(A) (B)

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Wtrich of the following are properties of

(c)

Rtiot

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(D)

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They work best at a particular pH. They are not affected by temperature. They work on'only one substrate..

I and II only I and III only II and III only I, II and III

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13.

which of ttre parts lade[ed (A), (B);(c) and (D);supplies the tooth with food?

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(A) (B) (C) (D)

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The process by which undigested food is eliminated from the body is called

Ilerns 10-11 referto the followin$aiagram which'shows a part of the digestive nact oI a numan. 14.

egestion

excretion ingestion deamination

Which of the following combinations

shows the correct percentage of oxygen and carbon dioxide found in the lungs of a healthy perSon? Oxygen

In

aaswering items 10-11, eac[ .option

15.

may, be used once,-more than once or not

Whhh orlan

secretes a substance which

neutralizes hydrochloric

acid?

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Which organ is responsible for digestion of protein only?

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(A) (B)

4%

L6%

L6%

4%

(c)

r7%

0.03%

(D)

2L%

0.03%

Climbing up amountain, a group of hikers difficult. This

finds thatbreathing becomes is MOST likely because

at all. 10.

(A) (B)

the air has less oxygen

(C)

they become tired from the long walk the temperature drops and the air is. colder

the

(D)

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Carbon Dio*ide

they lose too much water

bY

sweating

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Which of the following propertips

of

17.

membranes are required for rapid g'aseous

During respiration the release of energy in a cell occurs when

exchange?

I.

., Moist

(A) (B)

II.

'' Thin-walled

(c)

m.

(D)

Smail surface areato volume ratio

(A) . ..' I and II only (B) :' I4nd III only (C) ,: II and III only (D) ''' I, II and III

ADP is converted to ATP ATP is converted to ADP ADP is converted to lactic acid ATP and oxygen form oxyhaemoglobin

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Item 18 refers to the following. ,

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Eq) . ' .c)..

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40

Number of cigarettes smoked per day

18.

Which of the following can be deduced from the graph?

(A) (B)

(C)

t*:*Yber

of cigarettes smoke{ per day increases, the risk of getting lung cancer

i, As the number of cigarettgs:smoked per day increases, the risk of getting lung cancer

: decreases.

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Wlien 30 cigarettes are smoked per day, the risk of lung cancer inireases ten times. smoked per day decreases, the risk of getting lung cancer

(D) ". As the number of cigarettes increases.

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'Why do W9 need tansport systems in t$e

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human bodi?

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To:i produce hormones f6r

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To protect the body against diseases

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(A) (B)

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(D),

I and II only I and III only II and III only

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(A) repid ditrusion ofgases and glucose CB) slow diffirsion ofgases and glucose (C) ' rapid diffirsioh ofprgtein and fats (C) slow diffi.rsion of protein and fats

Tol.transport substances from one part of the body to another

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ooordination of body processes 23.

I, Itr.and III ,?

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Which of the foltowing vitamins assists in the process of blood clotting?

(A) (B)

VitaminA

(D)

Vltamlnl(

(s)

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Capillaries have very thin walls which have only one layer of cells. This is to allow

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Itdm 20 refprs to.tho following diegram of the human heart.

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Item 24 refers to the following diagram which shciws parts of the human skeleton.

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(D)

(c)

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Which labelledpart contracts to pump blo6d, around the body?

Y

z: Item 21 refers to the following diagram df a ceu.

24.

Which of the foliowing combinations correctly identifles the bones labelled X,

Y andZ?

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The diagram MOST likely represents a

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'(a)

liver cell

(B)

phagocyte

(c)

lymphocyte red blood cell

(D)

(A) (B)

(c) (D)

BoneX

BoneY

BoneZ

Tibia

Femur

Femur

Tibia Tibia Fibula

Fibula Fibrrla Femur Tibia

Fibula Femur

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trteim 25 refers to the

following diagram of a

28.

hirman arm.

Which of the following sets of constituents is found in the urine of a healthy person?

(A) (B) (C) (D) .'29: ;t

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Urea, glucose and water Salts, urea and proteins Urea, salts and water Proteins, salts and glucose

Liam notices that his face is flushed (red) afisrplayipg football, Which ofths following procespes carlses his face to be flushed?

(A) Insulation (B) Evaporation (C) Vasodilation (D) Vasoconstriction

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Item 30 refers to the following diagram which.shows a cross section of the human skin.

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25. ,

Wtrictr of the following occurs when thg . ar.m is bcnt or flexed?

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(A) ' .The biieps pulls on the radius. triceps pulls on the ulna. (B) : (C)_ .The The scapula is pulled down. (D)' The triceps shortens. ,.i' 26.

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Which of the following connects muscle to

bone? :' (A) Tendon (BJ Ligament

(C) Muscle Q) Cartilage

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30. 27.

Wrich of the following allows movement in all directions?

(A) Knee (C) Ankle (C) Elbow (D) Shoulder

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The stncture labelled X is the

(A) (B) (C) (D)

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hair follicle sweat gland adipgse tissue seb4ceous gland

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gtood/ normal

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which (if the following pairs shows the processes taking prbce at s and N? s (A)

fl (c)

Less reabsorption of water intb'the blood

More reabsorption of water into the blood

More reabsorption of water into thr. blo"d

Less reabsorption of water into the blood

No reabsorption of water into the blood

More reabsorption of water into the bl,ood

(D)

reabsorption of water into,the blood

.

No reabsorptiou bfwater iuto the bl;od

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The centi'al neryous system is made u! of the 7ri (A) (B) (C) (D)

braln and spinal cord brain and spinal neryes brain and cranial nerves spinal cord and cranial rr"*"r'

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Item 33 refers to the following-diagram of amotor neurone.

33.

W.hich labelled part is the axon? i:

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(8,)

(c)

T

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II

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(D.) rv Itdm 34 refers to the following diagram of .. .i the 'human eye showing image.formation.

Item 35 refers to the following diagram showing some of the organs in the body which produce hormones. .t)

34.

The image

(A) (B) (C) (DJ _.

X

is

NOT

M

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inverted formed on the retina smaller tlian the object '': the same size as the object

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35.

Which hormone is secreted bv S?

(A) (B) (C) (D)

Adrenaline Insulin Oestrogen Thyroxine

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Which of the following comparisons is NOT tnre for nervous and hormonal confiol?

(A)

Nervour Control Elgbnical measages navel along n'6ronee,

Moeeagoa Bro transported in blood.

(B)

Chemical messages travel across synapses.

.Only chemical messages are involved.

(c)

Thq,,Psponte is usually short-lived.

The effects are often long lasting.

(D)

Mes'sages travel

havb an

sto*ly

effect.

Hormonnl Control

and take longer to

Messages travel fast and have a rapid effect.

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Oirulation i5 the process by which

(A) (B) (C) . , (D) ,

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fom'alse,beoomopreghant a rnale and a femalo gamete fuse, an egg is implanted in the uterus1: a niature egg is released into the

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Whioh sf thd following methodg sf btrth eeFfrol ie l.EAfl3 eftetlvo In proventlns

40,

'prognancy?

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(A) (B) (C) @)

oviduct :,

I em 38 refers to the following

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diagram which

.' shows the htmanspermatozoon.

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Which ofthe following occurs when azygote receives one exfta chromosome?

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(B)

(c)

.

(D) I

Which of the labelled parts contains mitochondrib?

,: (A) ', " i.(B) (C) . ." (D) r

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(A) (B) (C) (D) ,. 42.

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Natural method Barrier method Hormonal method Mechanical method

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Agene mutation Incomplete dominance Sex-linked inheritance .A ihromosomal mutation

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a multicellular organism, whenever cells need to be replaied, cells divide by

(A) (B) (C) (D)

tq€fgr-iF fission mitosis

.

fertilization

oesfrogen prog-bsterone

luteinizing honnone

folliile-stimulating hormone

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Items 4748 refer to the following diseases'

Item 43 refers to the following genetic cross ffin-st o*s the inheritance ofblood groups in humans. Alleles A and B are bodominant to each'bther and both are dominant to O'

(A) (B) (C) (D)

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Tuberculosis

TlPhoid Ringworm Gonorrhoea

with Match each of the following pbrases

which may one of the options above, each of at all' not or once on"e, moie thin

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qftislr'of the following offsprile (A)

(B)

(c) (D)

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K L M

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Caused bY q fungus

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Causes severe diarrhoea and abdominal pains

inherited

49.

the homozYgous recessive allele?

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Antibiotics are chemicals which can safely not harm be taken intq the body' They do . human cells but theY destroY

(A)

tungi

(B)

moulds bactoria vinrses

(c)

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(D) 44.

Wtrichi.. of the following is an example or

Item 50 r.efers to the following diagram i-ni"-ntno*s the stages in the life cycle of

genetic engmeenng',

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(A) ,' 'Uslng stem cells toproduce org?ns igi .. Tissueculhreinbananaproductiol

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45.

mosquito.

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ctottlng ofhigh-produc1sa$mal,s Production of insulin by.:E' coli bacteria

Which of the following CANNOT

be

prevented by healthy living activities?

(A),, (B) ., (C) ,l (D)

46.

the

Influenza Sickle-cell anaemia Iron:defi ciencl anaemla Chronic heart disease

Seema'has the following signs/symptoms: constriction ofher bronchial tubes, boughing and.wheezing. She is MOST likely suffering,

from

''': (A): (B):' (c)r' (D),

asthma

malaria

t)?hoid tuberculosi

50,

in Which of the following stages are found or on water?

@)

(c)

iI and III onlY III and IV onlY I, III and W onlY

(D)

II, III

(A)

and

IV onlY

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SWAMP

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Where is thg leptospirosis vector MOST likely to be found?

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55.,

.Which of.the following cells does theAIDS

virus attack?,

The process by which water vapour changes to water is

(A) (B) (C) (D)

(A) evaporation (!) sublimation ' (C) condensation CD) 'solidification

Phagocytes

Er$hrocytes

Lymphocytes

,

Muscle cells

Which of the following gases contributes 'MOST to the greenhouse effect? ,::. ' '

53.

(A) (B) , , .(C) : (D) '

Sulphur

dioxide

56.,

The MOST effective way ofpurifying water in the home is

(A) (B) (C) (D)

:

Car.bon dioxide

Nitrogendioxide Carbon monoxide t

e

boiling and freezing filtering and frgeziug boiling and chlorination chlorination and filtering

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What is the dffect of carbon monoxide on the numan DodvT

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' . (C) . '(D) '1

Prevsnts oxygen uptake by blood' Daciage'sciliapresentonthetrachea CariSes eye irritation and reduced

v.isibility Hasiltoxic effects on the nervoui' j.

system

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nrt rni

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a river for refers to tho following gruphrwhish ehowe.tho oxygon soncenFation in

a

fivp'wesk

Forlod,

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Dissolved o-Iygen

cbnci:ntration

FPm) :.

:

Time iWeekg .t :

57;

The oxygen concenfration level

isI4osT likely

affected by

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58.

(B), (C) ,.

vectors

(D)1,

metal

sewage

ions

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Which of the follgwing stages are.involved in the biological filter method fdi sewage

59.

treatment?

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Residual matter is dried and used to make methane. i Screening oflarge objects' Stones covered with aerobicr bacteriaandprotozoawpichfeed on organic matter. ''i Compressed air suPPlies oxygen in aeration tanks, for aerobic bacteria.

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(A),' (B)

(C),',

(D)

(A) (B) (C) (D) 60.

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I and II only II and III only I, II and III onlY I, il,III and IV

Which of the following gases is produced in a landflll site?

Steam

Oxygen Methane

(A)

can be broken down by bacteria to

(B)

cannot be broken down by bacteria

(D)

harmless materials to harmless materials

is broken down bY sunlight to harmless materials

is broken down bY chemicals to

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A substance is biodegradable if it

(C) i':,

Ozone

harmless materials

END OFTEST t

IF YOU FINISH BEFORE TIME,IS CALLED, CHECKYOUR WORK ON THIS TEST.

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