GATE Life Sciences 1998

8/13/2019 GATE Life Sciences 1998

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IGATE-1998 I ol IJ

I LIF SCIENCES Jc=:===========I CHEMI.TRY COMPULSORY)

USEFUL DATA

Gas c<ms tant, R = S,J Jk- 1mol· '

= \) llN21 I aLm' 1 ~ 1 mol 1

Faradav constam = 9650u coulombs

AtomicNumbers

Ti =22. V c 23. Cr = 24. Mn = 25. Fe = 16.

Co = Cu =19

fot• each question givl'n below, fouraltematives ar (' pt·ovided or which onl y one is

con-ect. ' •ite the coiTt C I answea iu the ·answer

book by writing n, b, c 01· d along with the

co rr ('SilOnding sub-question

I.

20x I = 20 )

If the hnlJ-Life of a chemical reaction is

ill\ecsely proponional to d1e initial

concentration. the orderof the reactions is

a, 0

b. I

c. 2

d. 3

The degenerate num ber of atomtc orbital

correspondtng to tho princirJal quantum

number 4 fo r hydrogen atom IS

a 16

b 9

c. 4

cl 7

The rirs1 L:m· of thermodynamics IS rahdfor

a. re1 ersible process on

b. orre1ers1ble process only

c. adiabatic process on ly

d fo r all the processes

The m a ~ i r n u m depress ion ~ n t d in the

frelll'.ill ; p01nt or water for four solutionscontaining equimolnr amoun t orurea, KCI ,

5.

(j

7

8

1),

10.

CuSO,. and Ba(NO, .. respecuvely IS forLhe solutiOn hal·mg

a CuSO,

b llrea

c. Ba(N0.1I:

d KC I

The paramagneuc character obsen ed incase oro,. 0 ·and 0;, is in the order as

a. 0 01 = 0

b 0 >0 2 > 0 2

c. o, = o"·> o,d 0 >0 0

Nom ber of atoms present in the body

centere<,l cubic cel l is

a. I

b 2

c. 3

d 4

Wlucb of the fo llowing compounds bas a

h1gh dtpoJe moment'

a. C02

b. CC I,

c. H1S

d. BF

For the eq uilibnum reacuon 2Hl(g) 0

H1(g) .._ h(g)

a. K K.

b.

c. K1,> K

d. K,. < K.·Which one of the follo11ing has T Shap e

strucmre'l

a. I C l,

b NO;

c. CJF,

d. SF,

ldem1ly the tetragonal ly elongated

complex from the fo llowong:

a [Cr (H,OJ. I .

b [Cu (l·I?Ol,,f

c. [Mn (H10)r.f

d IFe CN)6)4



I I

12

WJ1ich one of he fo llowing . ~ 1 bi Sic ?

.o. (HJSi),O

b. fHJCnO

H :.()

d. N.,O

Wbicb Oil of u: foUowiug b:os c ntion

urround cd by h l a n i n

·- CoP

b. NnC I

c. ZnS

d. TI02

13. Whido complo:<: ion will exhiltii iuteus<

trnnsition itt its ch:cu·onie absorptio;pectntm ·}

IS

•· IF• n-I:.Ol•l._h. [Co (H,O).J''

c. 1\ nO,-

d. [Mn 1 1 , 0 ) ~ 1Idcntify tloe campkx Jl>owing ma go<tico ent w tlt respect to unpaired

electrons

n. fFe (H:{l)• ] b, I.Ti (1-lzOlolJ•

c. reo F, (f lzO)J]

d. IV (IL20)6)

Wl1icb one of tltc folio\\ in(> h:IS B- F hondlength •honer than the sum of their

c11valent radii 1

• BF,

b. Bl j

c. ·rJB .O(Eth

d. r,a t<1·tj

16. ·ntc molecule which ~ hulh o; n

nucleop hile nnd an elec trons is

a. CHJO H

h. Cl·l,.NH,

\ 1 l;Cl

d.I7. 11te :otructuro: of Ute inh:nno:dintc pmduol,

firnn ed by the ~ - i ( a t i o n of tCllu withCrl , nnd acetic :u0hychidc. whosebydt \llysi< j i\e.;, IJ<nL•Idchydc is;1

b.

18.

I l,

20.

c.

/

d. l'h C'H,OAc

Tron•-1-butene

--Aa. CHJ

b. CHJ

by r e ~ ~ c t with

c. CH: (oingletl

d. \ Ht(tnplet)

2or 1<

into

fg mer l f e f e r e n t i ~ l l fonned on •dditi<m

ofRr: to F f l m e l < t y n l n ~ i<

••

b

*.

**iazometlWie react;, U1 l ~ . ; t i •t id ID

form

a.

b.

c.



21

23 .

I

I

24.

J of 13i\11S11er the (ollowing:

J.

A. U c m u g n i r u J ~ or the CFSEand s pin-only magnetic monteol of

( M n ( C N IB. the Structure of Ure ntajor

pn>duct obluincd on reduction of (S) -3

CH3

COOHH CMutch each item in ~ o h r m n /\ ";lh lhe

pllenyl-2-penumun<: wilb Ui\111•.

Desi ',lmte nb>o lute conOgunu jon utthenc ly L-reated (IS)'Illmotric cemre. (2)most appropriate one in co lumn B.

h • 5

Column A

A. Heat tupul·ity ofsolids

. 'rrunsitiorr siHlc L O I )C. Orbilol <yn>Juel:r)

0 . Aromuticil)

E. U.A.glah

Column B

f. Sup<. '' adds2. strong ucids

J. Eins tein

-1 . Mulliken

5. WllOLiward·Hoffinan \ l l ~0. Ocwur

7. TrQ(lylimn ion

8. Eycr1ng

1\ 11S11Cr the fo llowing. :

OH

11 . Cnlculutc O>c molar conductance ol'

ammonium hydrmide at infinitedilution li·om the fo llowing dntn : A"

(NaOH) = 247.R x l o-', A" (NuCI) =126.5 x 10 und /\• (N I·I.CI) = 149.7

10- ' mho mo l I m. (2)

B. Cnlcu lme the slnndnrd em f of thereaction

Fe 1 Jc - > Fc(s)

Given : c" ~ 0.77 1 V. c"= - I J A V,

(J)

J\ ns11 cr the fo llnwing :A. Three mok;; of ideal gas were ~ l l u w o dtn ex pand isothcm>ally and reversibly

from V1 to 6V1• ll>e i11itinl pressurewas 20 atm. The work done in thoabove expansion is 45.6 kJ. C'nlculmcV1 und temperature. (3)

fl. Tho magnetic moment 11f [Fe C'L. I t l ;

1\cll as of L F e ( C ~ 0 4 b f is -5.9 BM .A c t ~ u n l lor l>clwviuur tny n1 theslundpoinl (ll ' valence bond theory, l )

25. Answer lhe lhllnwinf c :

II. Whnl Is the product due to l h ~ I C I I ~ t i o nor alkali mcwl borohydrides withI H4CI ' Dnm StroCl\lre or the

product and cmumenl on s clectrnnicQQH stnJL furc. (2)

26.

R. Dnlll lhc t u r c Of c ~ a c l o l \ l ·triphuspho1.cn". ( I)

C'. T h ~ chair conformation or 3-D

glucose in which all hydrOX) I groupsttn : L\ illl is oul as we migh t have

predicted from uxini·11Xia l non.·

bounded interaction. Write thestructure and explain in briefabout U1e

llMlnJhle facwr lbr Ule dccrense()instubilit). (2)

AJJswenbc lbllo11 iug :

A Which uf Ure fullowrug nrolccuiL-s

Onns inlmnwl\ culur

\\ 'ri le h.> m1b1 stuble conlbnuaticmslww ing intnunolcculur bydrogcnbond. (2)

I.

2.B. Write l h e ~ t r u c t u N of compound s lA).

(B) and (C) in ibe li> llowing sequenceorrcncllon.

I t 8 10CKEMIST1lY

For euch s u h t i c u r gh eo helo"· rouruhernuth't5 ure J rovidl'll or wh ich only one



correcL Write the correct:ruswer in the answer

book by writing :o , b, c or d along with thet.ortespondint:su b questiurt number.

(2ih: 1 = 20)

J Whiclt one of tlw foUowing docs not

correeUy t'<'}JU1Sentthaproperly of

a. An ordered structure in tlte Uqllid state

b. A higlt didectric COtb'iant

c Does not interact electrostatically wtth

pharged so lutes

d, Ability to foon l1ydro.gru1 bonds witil

solutes

2. The pK values of carboxyl. imidazole and

amino groups of blslidine a r ~ 1.8, 6.0 and5t2, respecnvely, Its isoeiectnc point willbe

a,

b. 5.5

c. 6 5

(i. 1 6

3. The i n t e r l J e U ~ : ~ amino amd resulnes o

~ p e n n w h a l e myogJobin are

a Nonpolar; ~ t a b i f u l l l l by ltydropltobi<-'

iJtleruction•b. Nonpolar. stabilized by h y d r o h . i ~ c

~ c t i o n sc. Charged ancl po lar, stfilnlimd by

hydrntiond. Cllll ged and pol•r. stabllized ll )

dispersive lorces

4. The oxygen dissociabO t cll Ves of follTsuh:;t ance n b C cutJ d are shown in

figure I

Which one of lhese s t a n ~ e s will be lhe.mosl effective respiratory' carrier of

oxygen?

n

b b

c t ..

·1of 13cL J

5. A11unchargednlolecule suclt us glucose .islriDlsport.ed lly passive dlff1J$ion lh:mtoutside to-inside of a ba¢ terialnMnbratteunder lite following sel of w d l l i . na. Llutside concenttatitln ~ I M ~ i d e.

concentration= Io· M

)_ olllside concentration = 10-3 M_insideCOttcentration = Io·SM

c. oukide concentration - Io-' M utside- '

COtiCetllf llion= Io: M

d. ou,IIide. eoncentratiou. - t M. insideconcentration= 10·ZM

In wlii.ch one of dte above. cases will.tltorate of ransport be 11le Juglwst?

6. The following reaction t:ikes a ~ e IU\der

sbl.ndard conditious.

gl uc.Jst'-6-pltosplrate - > fruclose-6-

pho'llh'' 'o

ldetlti.J)' tLe cmlllct mt,st apvropciate

slli.lam ej>l

a, The free ~ n e r g y ohange, 6.0, i • eqool

l6Zero.

b. Tite standard JTee energy change, liG,

is equal tozero.

c. liG is equal t'o liG,1.

d. Titu equilibriuru cous1a l.t is equal toone.

7 Por whioh C lli> of tlie foUowing pairs ofsubslrutces docs tlte inn.ormitooltondrialmembrane contain B]Jeci tic trruu--portproteins;

a. NAD 1l.nd NADH

b. AlviP and ADP

c. Malate and Aspartate

1l Ctttate Wl<l OJW.loa<;etnte

8. How many ATP mo lecule>1 will begenerated on complete t l l l of

pltosplwenolpyrcvate to r.:o, IUld FlzO ?

Assome that tlte ~ y c e r o · 3 · . P h o s p l t a t eshntlle is operating, and lhatone o l e c t ~of CfP ~ equivalent to one molecule ofATP_

a. IOATP

b, JI ATP

C, 1J ATP

d 15 ATP

l. Wlticla · of lite f"lll'wing ~ n l lcOJicemmg· dtnc add cycle is corre·ct?



9

2 .

22

Which one of the following <tll tcmcn"3bou t the poly A tall• of the euk:ll)Otio:mR NAs is corr<:ct?

a. ·n ,c are addod by p<tl)' A

using. TP ns Lbe sole subslrat\;' .

b. >< \' are .1dJed by RNA polyJ"<rasc D

m • templntc indcp<' ldcnt rc•ctiou

usmg '\TP ns th" so le nucletin e source.c T h ~ ore ~ l e n v e d fi'Qm the m N ~ b)

n c : q u c n ~ ; e ~ n d u r i t x ) n u c e n t c :the Jll< Ogllilo8 the RNA SottUonco

AAUAAA

d. TI1oy arc < ncoded by ~ t n > of

polydeoxythym1dylalc in the templatestr.md of the lene,

1vlothnne ean be o ~ d i 1 . c by amonoo.\:)'l "n ' z ~ ' T l > c s t\l molhanul. Ifthe PtviR sp< ctra of rnctbnnol l• t•ke11 . he>\'mran

y prolonn . S O n t l n C ~ Wc)u1d

il show 7;a . 1

b. 2

c. 3

d. 4

Motch ll>c entries io lbc colun1n 1\ will1

cboflc in cohunn Band write the rno1cl1.ug

pairs in tho answer book 15 x 1. = 5

f.'olunm A

A Replication lonn

13. Lend ing •trand

r. Oknzalo fragments

D. DnaD bcli...,so

E. Rep protein

Column '[3

I. n Hdicosc Uwt fw>ctim"' i l l lloc;elongating rcplicatiuu fori<

2 syntllcSis JlrucliOII I> OJ IOS>ltl fU tloot

lo repliclltion fork mtwement

uuwindJ str.mds nl tho. origfn of

rep lication in ••socootion wilh dnnA

11nd dnoC pro tein•4 is sy11lbesizod oonhouu uiily

5 the locns Qf i) N;\ Un\\ inding

Answer the following ;

Glutrnmc r.cic 35 iK un :tc:five ~ i h :' C $ i d u ~ ln y ~ M y The - l '()( JH

jlroup of gluw.miu. ueid S '"'quioCd

in lu pro tonuted fonn fol' theo l y t ;oct vlty or l.yso7.yrm:. l'hc

pH roptimu.m l'ctr the hydrOI)SiS uf

ehilin hy Lys1u.yn1e is 5.0. (.ll

23.

24,

25.

6 ul

a. ~ the pet'centoge of glutomie

ocid side chain groups thot wouldrema in protonntcd ol pH 5.0 in anaqul:nU.1 Ctl\ irOUJUCOl jpl\ uf the • ide

chnin earll(lxyl g,m up or g ocid

in on "'lucouii ~ : n v i r c m m e n 4.3 )

b. How is it flOSsible of glutamic odd 35to m a i u ma

iuJy in

h.sp r o l o n ~ oou

ot pH 5.0, in ordct to ""hibil onll.ximol

activity 'I

B. \Vhat ' lbc clllliA C Cristic features ofthe ten io'}· <lnocturol paltet'n l>:nown >.<

a P (2)

Answer tho followmg

A. What are the functions or the pro tonpump ;tnd A'l1 synll1a:ue as

cmvi.sagl ld in tbc clt - mjosmotic

hypnthe•is7 (2}

B. J.r prolo flS ore to be trnnsportcd .fromoutside of the inner mitochondrialmembrane io t11e- ins1de i.e. Lhe m<tll i.. t,

in llt.o p r c s c : n of ( i) • proto11 g_o"Odicutwbosc o umldc com:-cnlnltion is 10

1fold

higher compared to lhe ins·id >

.;oncentrntio n and <iJ) au electfical

grndicnt wbo.c valuu is 0.2 volts (lllcclec:trical pntcntial bcinJ more

negative iu•ide the motri.x). C'• lculaletlte vnlue of re-e energy dtnngc lllllll'lll.'isociatod w tl1 lhil< electrochemical

gradient at : 7"(',Given, Faracloy cons t:on t. P - 96 ,500

jmoes/(vviLm<Jlo)

; • CllO$t:llll R = jnuletlml)le 3)

, n ~ w e r the followmg ·

/\, EscberlchiJI coli b Q c l e r i ~ ore grol•'ll in

ni"diu m containing bo th ~ c o s e and) U C - l t ; ~ c fl he b tdt..1i 1Jm l l U ~ S C S S C N Q

norma lln<-llp<>ro ll. prc<l ict

L tltc effect on tl1c intra"ullularconcentration ol'allolnclose

2 he effect on Ute binding ot catabo lic.

acllvatorprotd n ~ ~ Inc opel'On, and

J. the effect ' ' the synthco;. of nc t o ~ ; i r (3)

A. Men tion the two important fa"tors thatet Sin'e the to oTe<:L binJing ttf M-foonylructltionly-lRN.\'"'' to 70sribo•mmnlinjtialion complex. (2)

i\nsw r tht f<Jllowing



26.

\VItAl ~ t e dtffetcnce belli een vnriou•cln...•es of ~ o d i c s I Ho'' nre t h e ~fonuccl '

B. Cnlculate U t ~ number Llf differentantibody spoclfidli"" which can befonned by combinntorinl nssocintion of

k light chnins W> lh heavy chn ins, P

Answet· the following ·A. 'In nilmgen lixing Qrgani•ms w ~ h n;

Khl zobium. AT P i• rctlturcd filf thcn i l r o g < J U ~ S c J C3cliun 1\hkh c a t a y t e ~the reduction ofdintotnic N: tel NJJ..,

ATP is gonol lltod by electron tr.msportnnd oxidntive phosphoryl:ltion. whichr qurre (): However. the nitrogenase

Je:tction is exlNitll:ly .'itmN ilive to 0:

How docs tbe prcseocu of

leghemoglobin in the bactetinlmeml>r3.ne resolvc llus paradox I (2)

8 \Vhol i$ the basic p r i n ~ t p behmd thephosphorotlnoate-basc-d t a g c n e s • ~ 1Whnl is lhe ndvno l.1go oftbis method?

(3)

f.'or .liub-(tnestion g h ~ n o w rour

a l l ~ r n a arc rro,'idcd of which only one is

<'Orrl'.ct. Wri te Ht l rorn-c.t a.uswer- in the ans'' or

book by writing n, b. c and d lllong with the

co rr<Spondi ng su 1> q nc<t ion numlwr.

2.

· ·

(2ll X I = 20)

i11c most dis(inctwo feoturc of d1e fomity

llmbellilerae is ·i11 unise;tu:tl t1owers

b. l)'pe stofilro nfplnnts

c. y p < ~ of inflor,.cence

d. diss<:eted lenves

A.:cordiog lo the aUopauio speciationmodel

hvoC)r

mun: pqpu l;lljom;of

spc:c.ie 'hccomv sepomted hy gc n grupl•icbani1:1 s .

h, two <ptc.i"' an: s.:rarilktl t>reedutgban·icrs

c.. 11ptaiatiun is sudd en .

tl . ~ p i : c t a t i o n is rc,crsibk

Wbcn nn o b j ~ c t i v e kru. of n liglllmicro5COp.: l.s changed ..from h:m pm' c:r to

high power. the ticld ofv iew ill

'' im:reMe 1111d appear lighter.

1 .

o.

7

8.

•).

7 ul I'b incrc : o.nd ttppeor dnrket:

c . d c c r e a . . ~ t :.nd : ~ p p e . u d:u:ker

d. dccre•sc and lppcar lisbler.

Dn lum anlhot u h u n . ~ n o g c n ~ m planl>.

What would be the ploul) of theregen er.m s7

a. H>ploid

b bot·h h>tploillitn,l diploid

c. diplo •d

. p n l ~ r l < ~ i 4An nlg:tl nnd fungal afiochttion lhal gn....il the identity to no UJdependcnl organism

occurs in U1e w·oup uf

a. J.fl. hcm

b. Orchids

c. Cycads

d. Slime m11hl•

Wh tch of tbe lbllowtn \ organtsnlS listedhelm< m>kes the most sisniti<:anl

conu-ibuuou lo mtrugo11 fLxa tiun in paddyfields ofl nd ia'l

a. Al>tob.lclo l

b. A.twln:nn

c. E raok.io

d. Closttid.ium

Which nne uf IJio liolluWtnit a n t i b i 1 1 l i C . ~ is

in•cti'atod by neowyci11 ph\lSplurlrnn •fern•e'l

a. K•uamydn

b Cltlurampb.:Jtico l

c. S p . . . - e t i u o m y ~ i nd. •mpicilliu

H ' < o k i n a ~ li-om Sllina ch cytosol ' 'Jltrifiod ill two 5lop;, 11tc aoLi\lity Of theen. ;yme 1md t h ~ om onnt of 1l1c protein

ohUtined ' given hehJI\ :Sl•·p M tiVIIY Pfetfdil

AM:nlmttmt ui,C.•rpl"fqJilni IOn • u IU m1 l l l t t ~ ~ ~ ' mUBA.Ii u k l t e . c l l i f d t l \ • t l r l l l 1Ut1hl 1nl

The fold of putilkntion aclti<Ncd in going11-om • tep 1 to •tep 2 i<

a. 10

b. s2

d. 50

SoJntLiic cutbJ VVJ. ent:.:i :liS 1.0 iudul liou of

' '"' )'ns l rom mntic i s • u ~ ;,. r u n gdependent on tho pr.,.<mcc f l h ~ < fc1 llnwing

In the medi11



·' auxin and NH \ 1 0 ,b. gibb.,..,Uins and KNO>

c. cthyleno •nd i b b c r ~ u L •d. abscissicocld and polsetbykn< glycol

10. ·n,c fuoction of Leg ltacmoglobiJJ io root

nodules in rhizobaum legumo$)1mblosos J5

n. to tran..port oxygen to he nodulerQrmnt ion

b. tQ trarup<>rl nolrQgcn to Uoe nodule

bacterium.

c. 1pn ll l:t lhc m•lule IAclcrium,

d lo protect the nitrogenase in the Mduleh a ~ : t e r i m

l'hc net ~ n t h e $ l of l . f u ~ o s o from lipid$can lllkc place during the gonnionliuu uroil c d • in a w o ~ kno u

a. l: ll.'<osc ruo nophosphoto shunt

ll. Mnlllle artate laultloi . glyoxylotc cydo

d. Ca lviJJ cycle

12 In m•n> p o ~ ; . . , . ul' plant8 due tu a u ~ ~ ~ : ~ bl

m _ i c o o r g . - t n i ~ r r J or oth r s j ~ l u l u rthe l h e s i ~ of the following i induced

13.

a. Phycobilin•

h. t n a l cc. Ribozymo

d. phy tQehrolllc

Cbloropla•lg e n o m ~ of

higjocr piMI i>n. doublcstrnnd.edRNA

b. doubk <trundctl dr1:ular tJNA

c. sin11-le stranded RNA

d singk t r n n d c d IJNA

n,. e > ( c h ~ n g e of geneuc mfonnationbel\\ een homologous chromatids atmeiosn bas buco shown to invo lve 11 cross .

bridged u r e called Holiday slructure.I he cytological veo11ion nf thos stntcmre is

o, l\ '11aJl'l IS

15.

b. o ~ < m a w\ :. Centromere

. S j l i n d l ~ r-.I)Crs

A plnnt15 snod to bo homozygous, when

.., it th o m e allele lor • ~ e n e vneach chrl.'mosom"of n pnir -

b. the plant i3 derincl from two simil:or

looking parents

c It Q( •j)(lmiutic <>rigin

d. It is produced oy self-fert iliuJoon.

8 ut 1

16. Phloem is concerned with tlte transport of

organic •uhsttm= from ·•our<:es · hi's ink> in pl•nts. Turglll pressure fn

fun<:;liuual phl<lem will be

a. lo" alth<>>outco aod ltlgh al the >ink

h. low n t t h ~ s nk llDd high 01 the source

c. lo al boUt, tlte >ink and >Ourcc. and

higb _u betw nd. 11U of the ubO\'o.

17. The lllllnhcr uf r•rim:ny W l l UIIICI'l> in

fiood wet• ho.• decre:t.•cd. \\1ticb ntguui•min the fo1rnl weh would mo•t llkcil thef ' i r ~ \0 SllftWn 111Cfl'JSC in I I U I I 1 i ~a s.econdi3ry cntlotumers

h m d ~ c icl

• •c.. unax o r g a n t s m ~d cnrnivnres.

'I he form in which tha bolk pfc•rbnhydmte u; r a ~ s p o r t c d m vnsculnrplan\ ; ;.

a. Jfuclo <l

b. rnOinClsc

c. ~ u c r o s ed. " ' '"

1 J. Which one of' the followin as responsiblefoo·defestatiou ofground nul a·op·l

Pu..:cini:t tttu\ hiili,.

h Sclerosporn gromini

c. Phytophihnm infcstans

1 Neurosporn crtiJis:i

20. Which on< of the li>llowlng forest• is mored i v e r s e ·u . ~ , m f . : : r o u . . ~ cvcrgr=:n

b. deciduou• e\'e1].rcen

c, 1mpic:o min o r e ~d. •-ubtropical rn'" forest

21 Ma tch the plant p e c i e < ~ (column T) withthe p m p r i a t c f;imilies (eolumn II).

tJx5 : S)Column 1

A. <'• o<lt

B. Tomato

C. P"'l

D. C•bbogc

C. Pumpkin

Column U

I. r u ~ i f e r a



22.

23.

24

2S

2 r u ~ u r h i t d c c o e3. UmbcUif<troe

1 . eguuunus:1c

5. Solan.>ec.1c

Answer lite .

A D i u W o r o p b e u y h l i m . : : ~ l ) ' l l - . : a (DC:.\1U).

an heroicadu interferes ith phclto

phosphoryllltion and o.xygen evolution.ltclo.:s n11t l o c ~ Hill reaction.

Propose a site for the inhibaory actionofDCMLI. (31

13. l f you were going tQ extract()hloropbyll a nnd o r ~ p h h fromcrushed spinach e ~ l l ' ~ . would youJl"eler a ~ t o n c1r ' ater a sulvc:nl

p ~ u n yuau an>Wt:r hriony. (2)

.ww the roii0 \1 ing .

A. Both , cellulose and <J.·anaylil le, consi,<t

ol J _.-I) - liltked D-glucosl3 units endCnn bd Gl<lcnsiv.:ly hydrolyz<tl.OC Ipite similorly. a penmn on n

diet con6it1 ng predominontly ol o.am)•ICJOlc (slan h) \\ ill ga an w c a g h ~whc'I"CIIS 0 JlCI'I Oll on 0 clicl or cdlulcJset,CO I"IOII) will Ktrt \'0 . \vlay? (2)

a Why do most fibrouslow nutrilionnl vnlue'l

An •'er the t'o llowin,g :

protein.(3)

A. N lllllo the onr.bondioxide Cix;ation cyol u

that characteri'l:es • desert plnnt

Mon1i11n brielly the plays .nlogictal~ l i g m G c ~ J H o h i ~ 8 ,Vslmu. (3)

B. \Vhnl arc Jbe Uarcc life fomas of planl>thai arc ;,doplcd lo dcsorl• 'I £:.plainhow th,.,;e avoad drough t. (2)

the following :

A Name • berbic.1d" that c;<hibil$ ou:un

like activity and a compouud thatbibits cytokinin ·llko aotivlty.

B. N urm:rmlil unnlllll pl:ulL>•nd indi\'idlllllpart.> of lx>U . aunwa llod pc11mninl.

pl:mt• exbihit g m o i d l JYIWth - . i n c : t l ~ >nd i n d i c a ~ < : the> three ~ c s in

the w·uwth cun e.

Answer the followin(l :

A. Place lhe f o l l o \ \ ~ n g OODIJ011eul5.

' uctants and p 1 d u ~ b of Ulo

nit:mgannse m p l o ~ r ~ m c i o n iu Utcir

con ct sequence during the eleclfonlrnnsl- . of rtitrogen lixat.ion :

., ' ]

ll. Olcidizcd ferredoxin

b. Reduel:l.sc componenl

c Nitrc,gcnase compouc::n l

d. . \mmonl:a

c. Nitrogen[ Reduced Ji:rrodox.in

g. lllectroo sow..:e 13)

H. I'MV ~ 1 1 1 double s trruaded RNA .l d ~ n i n e content s ~ s • • o. what i5 Ute

mosl proboble composition of thegenome '' (2)

IC : IIICIIOaiOLOGY

Fo r ~ a d l sub-qut>stion given b < ~ o w , four

all£•rnulins llJ'e provi l<d of 1\Uicll only one is''urrt"Ct. \Vritt t he.' unswl'r in 1hc ~ " \ n • rhnul' hy wri1ing u h, nr t ulnng ''i th th {•·orrPSpnndIn g I' ll b-<JU csrion nuna twr.

(20 :< I=

I. Under the live ldngclom $)nem of

d6ssilkation of JivinQ world. cubocteri•

ate 1•l•eed unccr t h ~ kingdona :

a. Pbnl.lo:<

h. PI'Oli•Ut

t.:. Puugi

d. Monc'l'a2. Which of the followillg <et organilim

belong 10 llr'chncbacterinl ?

3.

·'·

a. Myw plas ma. Saroton. Pneumocoecus

>. 1\ lcth3n<,;urcina , l ; o l o c n c ~thcnnoplla• m•

c. Nilrosococcus. i t r o r u o l S ~ Et'' in.ind. q J l O C < / C ~ a l s .

lln loeoccw;

The Scienlist ho pr oved b) cxpcrim-:nb

tha t the theory of 'pontnncous gancrotion

iswmns , isn. Jo•eph l.i•ler

b R ~ h e r i Koch

c. Louis P ~ , s t e ud Ed\\nrd Jenner

SynUJallc medium conbirung pho<phatcs.cnlc-mm . nnd il'on salt \. upon outnclnvinglead s tD precipatate J'onnalion. This is

prevented by nddin,g to Ua> medium

i>. ,-\mnaunium molybdl>tt:



5

6.

7.

s

9.

I0.

li.

b. l'.lhyl<ne dinmine e t r ~ c e l l l l •c I rL

cL Gluccosc

Titc r :so lvin.g power of n ntie:roit:OJX ia

determined by

o. \Vnvc.lengtb of he light eb. Rd'ructivc index of the medium

het\\·een the ~ p e c i m e n and olbjectlvelen:;

c. H o l f - ~ n g l e of Ihe objecbve lens

<1. 1\llthe tbree ,tbcwe

rho to llowmg is e ~ ' l rimgal •pore ·

U. t\,<;COS ilOfO

b. Chbmydospore

c. Bnardiosporc

d Zygospo"'

Dipic.olinic add s r c s ~ in

•,. Eb. Exosporo

,L Conidia

Tn agrrcu llul'ltl fie ld•. the nitrogt:U lixcd

n • b i n t Q'fpnilllll. •• comp•red to fro..-..

living nitrogen f LXts. Is

3 , Equal in amount

h. 2 fohi hi 1-b.:r

c. 100 tv lOOO·fi1 ld lugher

d. llHold lower

Tiu: e n ~ t j ) ' <outre fl r the genu.

NitrcMomonru. is :

::l Ammon.i.11

h. Nitr•ito

c. Nitrog"n

d. f\f'tiJ'lllC

Zynwm oniiS mobilis. ferments glucoseEmoor·tloouderoll' 1 • a l b w ~ to fUOtlu.:e

ethonul. TI1 " numh.:r ol' moles l>f ATP

formed pt'l' molecJ

'gJuct)sef o r m ~ n t

i•• · 1 mole

h. 2 mnleo

c. 36 moles

"- 38 m obipbl.heria toxin mlubit.. protem synlhcsi•lhr()ugh

R e o . c nr pcptidyl ~ li'nm ·P'

1>. Bind ing tn l'•c1or EF · l

c. Inhibiting p.:ptidc bond fomtation

12

13.

14.

15.

IG.

17.

18.

ltJ nl t•d. ~ U f i n peptide bond r.mnntion

Hydro.'<ylation of >teroid ring (at pos[Lion

U) ond clehydr<>genation (ot poJitions I ond2 he effe.:ted hy two organisms.

They an: . : s ~ c t i \ c : l y .a. COJ}'nebacleti um Sl.r"f)tomy

sp.

b. Rhizopu. 'I '· Cot)•ncbacknum •P·c. >Up.,rgillus ll'· Rhizopus sp.

d. P•c ud<JLUtJnO> sp. A.<JlC 'giUu.>>p.

Titc: growth of Leueonosloe doxb'ilnieumand L. Ciu·o••orwn imparts he

charadenstic aroma to the fermented m tlk.lt is because of tbetr ability lo produce

a. -""elY' C oA

h Aeloo»elic actd

c. Di•cetyl

d. Ac"toionhe t\vo d i f i e ~ d g n r s prcscnl m mun: n

ofGram pos ·l ive bacterin ace

a, Gluco•amine and N·t\cetyl•tglucosaminc

b N·Ac-ety glucosamiM and N·acctylmurnmic ucld

"· N· Ao<:tylmu.rumie ~ c i ~ and N·at.:.:tylgluwronic ao[d

d. s lucosanun.: mnd M a u ~ m s ; r u u o . :Tin: geuuahc of U t . o c i u j ~ vi < is

a. Slng lc •l.raud.:d DNAb. Single s ltllnded ~ " 1 A

c D a l r ~ m d UN A

d. Doublestronded RNA

lmmuni•atiun wi th triple antigen olTe,..prult:ction n m ~ l t h e foiiCiwing di•ca;cs

a. D1phll1enn. J>mtussis. l l t n u sh Pt:nmsts, T c t a C'holera

c. l'.vph01d. Pa mtyphoid A. parotvpltoid

B

d. 'l'ubeN Uosh, Iypltoitl, ~ ; ~ n uTJ1e number ofdistinct p<:ptid"" une wouldget 1111 ruiUlhtg sccr<:IOf\' lgA un ~ D SPAGl under r OduClllg cct11ditions. i•

•. t

b. 2

d.

Altapltilotu.xius ""' produced l.uc to liec l ~ : a v o 1 g u of



·' An llbodi..s

b. Comp1cmenl<

c. lntcrlcuk.ins

d. Clos Jll\DJG protein:

19. ITndogcnoll$ viral antigen> ' l1 pr"' "tllc:d toCD T-cells by

•· J>.lliC Class f

b. J>,ffiC Class U

CD4

•'- CD2

20. ll1c proknryotk l lhC>5CJil 1C ]1o•

scdllllcnllllion valueur :t sos

b. 70S

GOS

d 405

'2 1 T.istcd Ill Colwnn 1\nrc

' 'JUtimiorobinl ngcnts. in Column 3 the

ll rgnnism' again•t wbleh t h ~ y arc u ~ e d undin Column r· heir m o impOL1nl

mcc.ban ism of action. l'vluleh the

"nliruicrolliol agent (1\) with the ursnoi$111(B) and thu cnrrcsp11ncling m e c h ~ n i m of

Jction(C'), ( 1(5 = 5)

ofumn

22.

A. Penicillin

B. Ny•L1tin

r . Azidothymidine

D. CIJioro•1uine

E. Rifamycin

Column 13

I. Yca$t.

l Go ill 1•osllil e hndcria

3. l\·blnl'ial pal'l1silo

4. Tubc1' ulosis

s liJV

Column C

•· lnhi\lit• RNA polymern•<h. ln.hibit< cell wnll hio<yllth i'

u Dnmnse< cellmemhrnoc

d. lnhibits roverso lrnnscriptnnco

c. Blind.• to DNA

Answ<>r the following :

A. In an ut ti\'elysrnv.ing hactcri•l culluoc

the cell o u m h ~ . . - incr<•.•ed li'om 10'

cell•lmJ to lllr cell• ml in 4 hours( '" c u l a U•e

I I uf ]

l, number of gcnernbons it b a ~ gone

thr lu gh. and 12)

2 generolion Lime in minutes. ( t l

B. Bow du I ghl 1md electron microsc:opcdiller in the lhll<l\1 ing :

I source O r.uliahon for image tOnm lion

l . No ture oflense-; 12)

2,;, t\nswer lhe following ·

A. ln autotrophj i c . r o - o g ~ m i s m i c : ~ rd i o ~ < i d e ts ~ ~ : e d by Ca lvin .:.ycle.Balance the reaction 2iveo bela\\ Ill

produce one mole of l y c c r o l ~p h o s p h a t e :ofter filling the mis,.ng

componeHl in the reactants : (2 • J1

ro, - 1\TP T , , . • -+ glycemlp h o o p h a + DP t l'>AVP'

B. Write the koy rcuction M a l ~ h)Aldo ose in glyc:olysi• Iby nom.o1g t11c

•ul>strolc and products) (2)

24. An•wcr the following :

1\ . Sho diagru utmatic"ll) l10\\ trp

op<..>rnn fimctions (2)

B, Whnt ore photo-outotroph• andchcnmhel-erotropho '/ (2)

. Deline the fo llowmg on one or twoe n c ~ (I x 3 3)

A. Shollle

a. lnu·on

C, • • ~ o t m p hD. Ke•lriclion cndonudonse

E, n s d u ~ t i26, Answer the following •

A. V iiou.. type• of nruyloscs •ru used in

the pr<><luction of •yrup ond dextrn•cfrom starch. Name c:nzymC whochrocdi>le c•th or tho followin.s

conver•ions :

l. •14t'Oh 10 g l u c o ~ e2. stoJ-cltlo oligcn . ~ h l l l i < k - s ood malto•c

3. • lnl'cb lu m a l l u und dexlriM p

B. ~ m e ll1e .;ondillons under whicb

ncctic bnctcria und bocterfu and lactic

ac-td bac ten:a cause spoilage of 'lne.

(2)

L : ZOOLOGY

l"ur each suh-ques rlon given b < ~ O (•lu rultei'Uathes re r ~ . - , r wluch unly vnr IscorrllCt. Wr itco tlu ot tf t :enSW{'r in 1hc tm sw r



book writing a. b, c or d ulong with the

t (,rt P') ding su \ { l l l ' S \ num

(13xl = l3)

I. Furyh•line animaL•particularly in

SWl

11 River

o. bstunry

rl L.nguun

succeed woll

2 ~ l u t u n l i s m i5 a r o l ~ t i a n b i p between_two

e d . when

o. Jloth p < X i e s nrehenefited

b. Ooo 5urviws :u1d the othey djes

c. .E.-.enti•l to one but neither h;rrmtiolnl)r helt>l'ul in tho other

tl, Essential In one and harmful In the

nlhcr3. l he zane t Ihe mnrine

r:cost•stem os loc:.led al>l> depth

J . trptu 200 m

b or 100(1 m

<.:. nf 2(k)ll m

d. he ow 4U0 ) m

4. l'n<ftlferentlntedmesodt:rm d.:velop&mt o

Nen•ooJ tissue

h. Connectivetissue

t: Scn Of)' u r g r n ~d. Digt:Stivc glands

S Protein onohored itt 1ho plll$m• membron c

h} g.lyco•yphosph•tidyl inositol Unkag .:an be ckaved bya, PllQsphOJyiJISe B

b. PhosphoI

c. Phosphodic•tcr:>se

d. Pho,-phokin..sc

6. P u r i n ~ glycoprotein S ) t l in

momm;11lnn glycosylotfo n o•'; Ursa ln the e . ~h. In the mitochundrin

c.. n the ndopln.•mlc reticulum andGolgi Yes des

d Ly:;osomeo

7, Ihe marl<er prote1n lor mitochondrio IS

a R l ' < ) oh. Cnt,n a ' ~ :c. Acid pho•phulJU>'

12oi nd. Cytoohrome C'

8. Glucose o l e c move t ' I C . r o s ~ th_

pl•smn membrane m a m m ~ l i a n cells by

a. An ATP powered pump cnlled < ~ C l i v elrdnspnrt p1occs,;

b A p.1ssive diflirRion p o ~ sc. An lon chnonel protem .town rheor

crmcent.rntion gradicrn

d. A m mhmnc 1rans1>ort pr(llcin calledlf .tiUJ UJtlt.. f' f Hlein

9 Somatk mutation of immunoglob ulingoncs accounis for

u. Allel ii exo Wiion

b. swildling

c. l l i . n i l malur•tion

d. All of llCS<

10. CD 4• b ~ l p e r T tdh blud 111 pro=<sed

autigcn wb 't ox pro3Sscd in ussocilllio u · ~ i O Ja Cla•• T \•0 IC molccui<:;

b. CIMS UMHC moleeult:S

e. flulh lho above

d. lL-2 receptnr

II An e n t i a l aminn lltid ; nne hod)

a. cannot be reabsorbecl by the renaltubule .

b. Connot bo rt:alr.mmed by lire renaltubules.

c. Is rcq ulnlJ for the syntltcsi.s of .:crl•inpr-o lcino md)'

d. Is poorly absorbed from thddiet.

12 Epioephrine dL'i rell.\ ""

a. Heart nne

b. Cardioe eouu·aetilit)•

c. Basa l metabolic rlto

d. Cuinn<:(lus hlw d llo

The ma in constituent ofo blood clot is

a. Thrombin

h ril>rinc, Pbsmlnogen

d. n.rnmboplll•t in

14, Mulch the nom e oftheommals in co lumn Iwith lhetr conlnbuuons lo hum-:an

e.:istence in coluouo lL. (·I J ~ ·IJ

Co lumn I

A. Manatee

B. Pig

c C • l



15.

II>

17

D. L.1dy hitd

Column U

I. Affectionat e bumls

2. control of r u ~ l l l3. lfearl surgary

4 . Clonniug waterways of obstructing

n gctallon

Mnldt the lypQ; of tDJI¢tivily in ouimals in

column l to tlteir d mitio11s 111 Column II

(4 ~ I - 4)

Co lumn L

J\ Torpor

B. I t i b c t n : ~ l iC. Willll.lt" slcc:p

D. At:Sli\•ation

Co lumnll

I. lnactivits 111 wolhslnnd e•lended

pcriud< ofdry ~2. fnacti vily wilb. uell l' nonu:tl bodv

lcmpcroiuro with neor nonual body

lempero111re by large energy reserves

and the an.imalos easily r o u s e d3. Inactivity with lowered lwd)

tempcraturo and c c t O l l s ~ d motabQiiJ;m

lbaloM)' l:t<t fl>r woekti or monOv. ,

-l . lnactivity witll lowered body

lcmperaiure and decreased m e t . , b o ll h ~ l QCC llts daily

t'-lnkh entrie;; in l'<>ltomn I wilh rhuse

in Column U (4 " I ~f 'OIUJ1U1 I

A, Neurom:osl

H. Johnston 's o)rgan

( ' Glochidlum

1) , J n ~ o ~ < oColumn II

1 •udil\"1' receptor

2. Lnteralline system

3. Olfuclo t')' ro<eptor

ivalve ''''n

Ocfin.: lhc following

A Wes tern t l l n ~~ Anthropom"'Jlhi<nt

{", Hublluutic>n

h 1- 5)

18.

19.

20.

:11.

3ut nD. Altricial

E 13ates ian onimicry

An.<Wcr the followms . (S s I - 5)

A. Whatu aUopnltlc •P i>tlioo ?

0 . \\-hOI is >onpiCl<US1

C. \\'IIlii it a f<Ttiliz.'ltiou uJ<:mbrllll< /

0 . What are Kleptoparosilos ?E. Whnt is 'C'olmptcmont ' in the immun"

•ystcnt ?

Answe< t h ~ f o l l u w i n ~ ,

A· W ~ ti'ont e g t ~ s have li lttpigmemation 10 the boUo.11 011 he top'I {2)

B, How o e ~ a re'ady·to·mate femalemoth send >ignal for mating 1 a malemolh 'l ( I)

C. Write lltc •cientili .. name of twn living

repn:Scn nU\'CS ofmoJlOn:Jlld>. (2)i \ O I \\Cl' tltc foll owing

A. What is aneuJlloidy •nd ltow is it Ukely10 occur 'I (2)

B. Wltltl Ul ' l: linked genes ? ( I)

C. Why do Uto X-linkod rcc.:ssil't trailsalwoys o:<pn:ss in ma le ol lsprings'l {2)

i\now<-r thc following .

A. What ' tloe Lbrcc D ~ ooqucncc

e lement• that are always needed toform a sbble liMar f'Unctional

eulaoryolic chromosome " t l l

B. Mention lh" eulaoryotic RNA

pol ymmt>e which Js rcspuosiblo Jru

the 9ynthesos of procom;or riho•omol

RNA? ( I )

r . Are eubtryoue mKNA> monocisu 'nicur pro1 'oL•tronic. 2 tl )

0 , Willi o d i l i C l l t i do ().:our at the S

~ U d 3· .:ud of IUISCOIIL ruRNA

t r ansCJipL t tmmcdi t ly afit r their

In the nuoleus 'I (2)

GATE Life Sciences 1998

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Transcript of GATE Life Sciences 1998