DUNMAN Prelim 2008 Biology 1

8/12/2019 DUNMAN Prelim 2008 Biology 1

1/17

Candidate Name: Class: Index No:

DUNMAN SECONDARY SCHOOL

Where discernment, discipline, daring, determination & duty becomea part of life.

___________________________________________________

_

PRELIMINARY EXAMINATION 2!SEC " EXPRESS#IOLO$Y %&"'(

( HR (! AU$ 2!1045-1145 hr Monday

Instructions to Candidates:

Do not o)en t*is +oo,let -ntil .o- a/e told to do so0

Write your name, class and index number in the OMR aer ro!ided"

#here are "$uestions in this aer" %ns&er ALL$uestions in the OMR aerro!ided"

'or each $uestion, there are 4 ossible ans&ers: %, (, C or )" Choose the one youconsider is the best ans&er and record your choice usin* a so+t encil on the OMRsheet ro!ided"

ach correct ans&er &ill score one mar" % mar &ill not be deducted +or a &ron*ans&er"

Read t*e inst/-1tions on t*e OTAS )a)e/ e/. 1a/e3-ll.0

1


2/17

#his $uestion aer consists o+ 15 rinted a*es includin* the co!er a*e"

1" #he dia*ram belo& sho&s a detailed structure o+ an animal cell" #he structure thater+orms a similar +unction to the human lun*s is

% 1 C .( / ) 4

/" #he human brain, idney and li!er all de!elo +rom the same y*ote" #his +actindicates that the cells +ormed by di!isions o+ the y*ote are able to

% di++erentiate C relicate( mutate ) reroduce

." What substance can be +ound in the contents o+ lant !acuoles

2I3 Chlorohyll2II3 Water2III3 alts2I3 tarch *rains

% 2I3, 2II3, 2III3 only C 2II3 and 2III3 only( 2II3, 2III3, 2I3 only ) 2II3 and 2I3 only

2


3/17

4" #he dia*ram belo& sho&s +our onion cells that ha!e been immersed in +our di++erentsolutions 6, W, 7 and 8"

Which o+ the +ollo&in* solutions are arran*ed in order o+ decreasin* &ater otential

% 6, W, 8, 7 C 7, W, 8, 6( 6, 8, W, 7 ) 7, 8, W, 6

5" 9aramecium, a rotooan has t&o contractile !acuoles +or the e!acuation o+ excess&ater +rom its body" #he table records the a!era*e time taen by a contractile !acuoleto +ill u and emty its contents &hen the animal is immersed in three di++erent li$uids, # and 6"

(athin* i$uid #ime 2s3

1;;

# .1

6


4/17

?" )urin* hotosynthesis, molecules o+ oxy*en are released as a result o+@slittin*A o+ &ater molecules" #his is the direct result +rom

% dar reaction C li*ht reaction( hydrolysis reaction ) reduction o+ carbon dioxide

;" xtra carbon dioxide is usually sulied to a *reenhouse as its normalatmosheric concentration tends to act as a limitin* +actor" When is additionalcarbon dioxide best sulied to a *reenhouse

% )urin* the day and ni*ht since the lants resire /4 hours a day( )urin* the day since hotosynthesis occurs in the resence o+ li*htC )urin* the ni*ht only since lants resire at ni*ht

) )urin* cloudy days only &hen li*ht is a limitin* +actor"

B" %n enyme catalysed reaction may be sho&n as +ollo&s:

9

Which line in the *rah belo& reresents the comlex

10" Which one o+ the +ollo&in* are all roducts o+ the li!er

% (ile, roteases and urea( (ile, urea and blood roteinsC 9esin, mucus, bile) 9roteases, amylases and liase

4


5/17

11" When bile is added to a samle o+ oil, the > o+ the mixture increases" Which isthe main cause +or this obser!ation

% (ile Duice breas do&n the oil into +atty acids( (ile Duice contains alaline saltsC (ile Duice contains bile i*ments) (ile Duice emulsi+ies oil

1/" #he *rah belo& reresents data obtained +rom an exeriment on starch di*estionat di++erent arts o+ the di*esti!e trac"

Which statement best describes oint % and oint ( on the *rah

% % bric red reciitate is obser!ed +rom (enedictAs test at oint % &hileiodine test sho&s blue blac at ("

( % bric red reciitate is obser!ed +rom (enedictAs test at oint ( &hileiodine test sho&s blue blac at %"

C % *reen reciitate is obser!ed +rom (enedictAs test at oint % &hile iodinetest sho&s yello& at ("

) % *reen reciitate is obser!ed +rom (enedictAs test at oint ( &hile iodinetest sho&s yello& at %"

5


6/17

1." #he *rah sho&s the ressure chan*es in the heart durin* a sin*le heart beat"

%t &hich oint does the aortic !al!e oen allo&in* blood to lea!e the heart

Euestion 14 and 15 re+ers to the results o+ blood *rou testin* o+ three eole, Fohn,Facob and Fenni+er" #he test results are sho&n belo&"

14" #o &hich blood *rou does each belon*

Fohn Facob Fenni+er

% % ( %(

( ( %( O

C %( % (

) O %( %

6

4o*n 4a1o+ 4enni3e/


7/17

15" What causes the red blood cells o+ Fohn to clum &hen his blood mixed &ithserum +rom *rou %

% %ntibody a in the serum reacts &ith anti*en % on the red blood cells,

causin* clumin* o+ the red blood cells +rom Fohn"( %ntibody a in the serum reacts &ith anti*en ( on the red blood cells,causin* clumin* o+ the red blood cells +rom Fohn"

C %ntibody b in the serum reacts &ith anti*en ( on the red blood cells,causin* clumin* o+ the red blood cells +rom Fohn"

) %ntibody b in the serum reacts &ith anti*en % on the red blood cells,causin* clumin* o+ the red blood cells +rom Fohn"

1


8/17

1?" When a erson is doin* strenuous exercise, a lot o+ heat is *enerated throu*hresiration" 6nder &hat conditions &ill he lose most body heat by e!aoration

%ir temerature 2oC3 Relati!e humidity 2=3% /0


9/17

/0" Which acti!ity increases the core body temerature o+ a mammal

% % decrease in metabolic rate

( hi!erin*C &eatin*) asodilation o+ arterioles

/1" Which one o+ the +ollo&in* is the common +eature o+ air sacs o+ the lun*s and thecoiled tubules o+ the nehrons

% #hey both a +reely ermeable to dissol!ed substances"( #hey both ha!e a rich blood suly"C #hey both ha!e cells co!ered &ith cilia"

) #hey both ha!e cells &ith a hi*h metabolic rate"

Euestions // and /. re+er to the *rah belo& &hich sho&s the chan*es o+ the lensthicness o+ a boyAs eye &ithin 10 seconds"

//" What chan*es occur in the boyAs eye bet&een the /ndand 4thseconds

% #he ciliary muscles are relaxin*"( #he uils are dilatin*"C #he susensory li*aments are ti*htened") #he tension on the susensory li*aments is decreasin*"

/." What do you thin the boy &as looin* at bet&een the


10/17

C %n obDect mo!in* to&ards him") %n obDect mo!in* a&ay +rom him"

Euestions /4 and /5 re+er to the dia*ram sho&in* a art o+ the ner!ous system in a +ro*"

/4" What can be +ound inside 7, 8 and H

7 8 H

% ner!e +ibres axons dendrons

( ner!e +ibres dendrons axons

C cell bodies axons dendrons

) cell bodies dendrons axons

/5" I+ a se*ment o+ structure H bet&een oints 1 and / is cut and remo!ed and anelectric current is alied to the +ro*As le*, &hich o+ the +ollo&in* may occur

% #he +ro* can control the mo!ement o+ the le* by &ill"( #he +ro* +eels the ain but cannot mo!e its le*"C #he le* cannot mo!e at all") #he le* sho&s normal re+lex resonses"

10


11/17

/omeostasis re*ulation o+ the body is made ossible throu*h the coordination o+all body systems" #his coordination is achie!ed mainly by

% Circulatory and di*esti!e systems( er!ous and endocrine systems

C Resiratory and reroducti!e systems) eletal and excretory systems

/;" #he dia*ram sho&s the osition o+ some *lands" Which *land roduces bothhormones and di*esti!e Duices

11


12/17

/B" I+ the +irst sta*e o+ an uninterruted human menstrual cycle is the +ollicle de!elomentsta*e, the last sta*e includes the

% buildu o+ the uterine &all( +ormation o+ serm cells in the testisC release o+ mature e**) sheddin* o+ the uterine &all

.0" In human males, serm cells are susended in a +luid medium no&n as semen" #hemain ad!anta*e *ained +rom this adatation is that the +luid

% acti!ates the e** nucleus so that it be*ins to di!ide

( acts as a transort medium +or sermC ro!ides currents that roel the e** do&n the o!iduct) secretes the enymes necessary to enetrate the e**

.1" Which o+ the +ollo&in* occurs in a lant cell but not in an animal cell durin* mitotic celldi!ision

% Chromosome dulication( CytoinesisC 'ormation o+ a cell late

) 'ormation o+ sindle +ibres

./" #he dia*ram belo& illustrates the rocess o+ cell di!ision"

12


13/17


14/17

Which statement best exlains &hy the oulation stabilied

% % redator secies came to an area and occuied the same niche as thechimuns"

( %n increase in the chimuns oulation caused an increase in theroducer oulation"

C Interbreedin* bet&een members o+ the oulation increased the mutationrate

) #he oulation sie became limited due to +actors such as a!ailability o++ood"

.


15/17

xlain &hy mos$uitoes &ould not be illed by the insecticide a+ter the +ourth sray"

% Mos$uitoes ac$uired resistance to the insecticide a+ter some time andsur!i!ed to reroduce oulation that &as resistance to the insecticide"

( Mos$uitoes &ith resistance to the insecticide sur!i!ed and reroduced aoulation that &as resistant to the insecticide"

C #he insecticide broe do&n a+ter some time and could not ill themos$uitoes"

) #he insecticide is not e++ecti!e in illin* the mos$uitoes because it is non-biode*radable"

Euestions .; to 40 re+er to the dia*rams belo&" #he le+t dia*ram reresents a ortion o+the double stranded )% molecule" #he dia*ram on the ri*ht reresents seci+ic

combinations o+ nitro*enous bases 2anti-codons3 +ound in comounds transortin*seci+ic amino acids"

15


16/17

.;" #he amino acid &hose *enetic code is resent in strand I is

% asara*ine C henylalanine

( lysine ) serine

.B" #he thymine 2#3 o+ strand I is accidentally relaced by adenine 2%3" #hisoccurrence is called

% se*re*ation C indeendent assortment( disDunction ) mutation

40" I+ both strands are used as temlates durin* 9rotein synthesis, the number o+

amino acids coded by both strands I and II is

% 1 C 4( / ) ;

END O5 PAPER

PAPER (: ANS6ER 7EY1" ) /" % ." C 4" ( 5" )


17/17

.." ) .4" C .5" ) .

DUNMAN Prelim 2008 Biology 1

Documents

Transcript of DUNMAN Prelim 2008 Biology 1