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CBSE Class XII 2011 : BIOLOGY

11 pages, 100 questions, 16 questions with responses, 18 total responses,    0    0
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57/1 1 7 0 ~ i :f P.T.D. I a.m., 7 a nswer 10.30 ~ - q-{ q uestion should 0 I question : ~ a ny paper ~ ~ ~ -~ m ~"~""Q5T a M to arks: T he question f printed 4"(r{ur w rite a.m. 1 10.15 J&-~ the " of qjT p aper. 30 ~ "3W-~~ ~ the -~ ~ ~ ~-"Q5)sq;) ~ the - From n Number ot 11 ~ w ill contains I ~ by ~ ~ a nswer-book. t he o f p age t itle t he o n C ode t he w 'rite m ust C I andidates I I I I I I I I I I I N o. Roll I I I I ' ;t. ~ ~~fffyjl pages. be candidate. questions. before it. the period. (Theory) : '/f~T Code7/1 No. 5 ffi4"!1;i5 m ~. I ~ v~ ~ ~II~~ I Series SOS I fq:; 3 ~ M aximum I q uestion t his of . a nd contains ) I ~ answer-book c ~ ~ ~ a.m. I ~ Serial ~ m f{;I~o1l~~~~, ~~ r ead side t> BIOLOGY ~ o nly paper ~ ~ '(lq)" 1 1 10.15 ~ ~ hand c ~ paper t.9.1 1 this 0.30 t o question " p aper the 3W ~ right ( ~ question ~ q jT during ~ ~ at ~ i :f the 3 ~ of 0 i :f be distributed f down tr;f?: page ~ a llotted the ~ - q-{ q uestion b een on t f script Gtr; t he this 1 ~ -~ title 5 ~ given 1 ~ -~ ~ this 0.15 f (;rrr; answer I write " that 3W-~~ h as check ~ r ead the ~ f 4; t ime number ~ ~ will f w ill attempting 4; ~ ~ that a~T;:r ;;ftq ~ ~ check ~ ~ ~ on ~ ~ the ~ m inutes 1 5 Please ~ ~ on h paper ours 3 students written F ~ ~ Please !Ui i :f ~ -~ Please . ~ ~ ~ . . - ~ m~~ . . ~ ~ ~ . Code 3 10.15 . . ~ ~ . . : a llowed: Time I ~ t;,l!7fRrr c i~~; ~;c' ,,~,'~:- I 2 57/1 ! i ! I . r flJ'flkrt i f if fi!Enpff ;if ij;qoc;r ~ ~ ~ n " frlIT ~ -ogpjt - fq."q;oc;qo 77\Tlr I -l!jt m ft';rJ: - ~ c mo/ 0 iJfrit ~ ~ i f m f flryT " frJft c mo/ a iq;T 5 3 H:f i t m ~ c mo/ a iq;T 3 i f, m ~ c mo/ a iq;T 2 W , { in-( I ~ ; r{f ~ ~ ) ( .3#f7 ~ -fq."q;oc;qo ~ q ;Jf I ~ . 3 iCii ~ i j; ~ F iRif - lr m 3 i f D ~ " frlIT - lr 3 iCii ' ffI;r i j; ~ F iRif - lr m 9 i f C ~ ~ 3 iCii : ;it i j; ~ f jf;,.ff - lr 1 0m i f B ~ , ~ 3 iCii ~ q)T ~ F iRif - lr m i fs ~ A I - lr 3 H:fD C B , ~ A, ~ i f m -w ~ (ii) I - lr 3 1Rqpf m " frJft : ~ ff/'il-<-l properly ~ 3 ~ -7lq~4cf> 7 I ~ (iii) (i) ft ~ ( iv) I a nd n eat b e s hould d rawn d iagrams t he n ecessary, W herever (iv) a nd m arks 3 o f q uestion o ne m arks, 2 o f q uestion o ne i n provided b een h as c hoice i nternal a n H owever, c hoice. o verall n o i s T here (iii) e ach. marks f ive o f q uestions 3 o f i s D S ection a nd e ach m arks t hree of q uestions 9 o f i s C S ection e ach, m arks t wo o f q uestions 1 0 of i s B S ection e ach, m ark o ne o f q uestions S c ontains A Section D . a nd C B , A , S ections f our o f c onsists p aper q uestion T his (ii) (i) I " t!T I General Instructions: All questions are compulsory. all the three questions of 5 marks weightage. A student has to attempt only one of the alternatives in such questions. labelled. . tt fq."q;oc;qo6fr( i:;rr q)T ' ! I . i I 1 1 j 1 I 1 statement. , 1 1 m ":;jffift ~ I 1 ~ a P 1 wall .T.D. amr. ~ g the ross as c ~ 3:f~ an ~ ~ uterine ~ a nd ~ p ~ roject. support t tumifaciens hey 3 =lT-j~ Mfu the ~ m an. " 5/~ in ~ b d~I~~1:11 ~ ~ efore g '5I'qjR ~ enome I implanted ~ a nd ~ to I p roductivity b odies? l~ ~ t h 'q:)"Tn1=!"~ ; uman reasons hrough ~ ' q:)"T ~ Agrobacterium ~ i w ater i n ~'i7.l1;rn~~ n a pes g reat ~ ~ p p rimary ~ "::5tT -;:rq W m ass m aps l gets ~ t o ~ ~ lT'GR ~ ife Give " ' d~I~~1:11 ~ q:)"T that ;JfiqT h ave ~~ t plants. he t he b iofortification. o f f emale. h uman a stage ~ ~ n ~~"'II~I~'i et o f ~j{/~qc7Rq'i g ~q~i~lrl~IFC!~ enetic to m . I ~ ~ i mportance t he S tate 'q:)"Tn1=!"~ ; , o f m-;:rq ~ ~ a ffect of " b etween a ncestor refer q;j'\ 3 (.;roc:) ~I~~~ =I~l'"qj ~ -q:;-~~~~~~~ engineer o b looms Biotechnologists rganisms a ll ~ ~ ~ c ontribution ' q:)"T ~q~~~I~",ur embryonic 3 I ~ a lgal ~~~i I " R _.. - c) c ommon d o H ow '!T;!Ir ~ ~ I I : -- d ifference I-fQI~~~1 ~ ~ t he t he N ame "5/~ \ ~ a W rite ~ p productivity. genetic hase ~ the ; s exually. M ention 2. ~ f ~ m-;:rq 5. Name i:fi t he N ame 7. ~ reproduce 6. 4. ~ ~ 8. 3. ;n1=!" ~ : ~)$:;;'~ ~ 1. I ' :f;: l 57/1 , ~A A SECTION . of I natural 1 ? I I I "f:?;fG7q,T~~ ~ ~ ~ i ts E 1-qlctl~1 ~ # ~~~I~~ 2 E xplain. c ow? n ~? 1;rr;:rT ~ I 2 2 ? ' Probe' I i b a ~ 14. ? ~ f rom ~ ~ d ifferent 2 ~ tumours. #~~ and malignant ~ V NTR ~ ~ i s I ~' H ow V benign ~ between NTR V NTR. I o I in modern agriculture. ~~(~~) Differentiate ~(~) f ~ f orm f ull ~ -~ ~ t he W rite VNTR 12. I ormal a f ~~ ~ ~1~1;<:f State the use of Biodiversity 13. xplain b acterium. S treptococcus b d ifferent c ~ ~ q:;"f ~ I onsidered ' ~ ~~~ ~ ~~~#~-~q:;"f~~ 11. Rosie' i '~' 2 sciences. rn ~~~I~~ s H ~ ow 10. ~ y p in medical rom importance roduced e nzyme t he N ame 9. ~B B SECTION 0) .~ .E C.) 00 0) C.) 0) e quation t he W rite r elationship. ~ S pecies-Area s hows g raph a bove T he ! Area p.. 00 2 OR of the curve 'a' and explain. Differentiate I .~~ 57/1 between in situ and ex situ of biodiversity. 4 approaches of conservation - i a I b I ' q)T ' a' ~ I ~ 7 T'C:JT ~ m " 5f';jf1fu-@ . q: ~ ~ ~ ~~lctJ~UI am I ~ ~~~I~l!. ~ @~ i t ype s ame I t he o f n ot i s f ormation g ~ ' q)T " 5I"qjR ~ ~ ~ . q: ~ I ~ ~ ? ~ f ~ fUqjT r <.j1~II't:jd " 5I"qjR ~ . . !!:!i!i~::~ ~ 2 q~ Justify. .+ q: 16. amete i n ~ wm~~.q:~~ i nvolved ~ m~ d ivision ~ ~ organisms. ~ I m-m ~ different ';!"1'!i1 in c T he 15. ell ~-~~ 37{'ifqr 2 c one example ases. s uch i n b and give iomass o pyramid f p ecological yramid a nd n given umber o of the f p the type yramid o f each Identify ..11111. :i::~::~i:~ :11~'Jl! ~Q't:jIRl!. ~an .q: ~ 2 j control. I q uf-., ' method of birth ~ ~ ~~IQ~UI ~ ~ q)T ~ ~~) ( ~~~Ir1~ ~ 5 # P.T.D. I I I ! ~ ~ -- }. --- ~ ~ ~r1~Ir1 ~ Amenorrhea ~, I 'q)T Describe the Lactational ftrofi:r:g ~ ~~ ~ fq~II~.s 'q)T ~-~ ~ 57/1 1~~II~.s ~ ~ 'q)T 17. 7T'C:JT "qTftI~~ m ~ ~ 57/1 ~ I o a f c oncepts in ~ each concept with ~ k ey t wo I system ~~riltt ~ " t he a re reproductive GT i :t>1 ~ ~ Explain j-f~I~t; ~ ~~ ~~ ~~ril Theory of Evolution. example. ~ the ~ ~ r ilj-fil9'id of ~ s election n atural ~ diagram ~ - q"{UT, a nd ~C C SECTION - - " SI~ ~~,~I ~ # " qjT"J:f ~ ~ ~ ~ ~ I ~ - ;;rq- ~ " 5fq:iR ~ ~ ~ ~1~lft~~~ ~ ~ ~ ~ ~ ~ - m ~ labelled QI~dl ' (i~ Darwinian a suitable i d escent B ranching a :t>1 d ~ ~ Iq~ll.(gril Draw !:\IQ~UI ~ ~ 20. 19. ~ = .' used. 2 . human female. 3 the help of 3 I 6 c:,*-i;t,\C;~'~~j:~ i s i t w hich f or p urpose t he W rite s hown. b ioreactor o f t ype t he N ame 1 8. 57/1 7 ? 3 ? p er~on(s) h nRNA ~ ~ ~ " q)T ~ ~ ~ 3=I"j~""@";:f (~i~I~~I-i) ~ ~ " m-;r 3 p lace. c hanges t he L ist c hanges? u ndergo t o n eed h nRNA t he d oes W hy h nRNA. o f t ranscription t he c atalyses t hat e nzyme t he N ame I ~ ~ " q)T ~ q rffi ~ ~ ~ ~ f fitr; ~ ~ t:m: ~ ~ >li~lfil~1 q)T t ake c hanges s uch c ell t he i n w here a nd u ndergoes hnRNA ~I q uf;;r ~ ~ " qj~ 0 ;j1) ~ ~ ~ f fitr; ~ 1 J~1fi{f ~ ~ ~ ) (b ~R'f~~1 ~ ~ 1Rq)) ~ ~ ' ;:IJ1:f " q)T ~ ~ ~ o q1~ (a) ~ ~ ~ ( ~~l<.1iG) I ~ ~ m ~ ~ ~ ~ ~ " 5iTt{f o q1~ ~ ~ ~ ~ ~ ~ ~ i :\'1'j$ ~ 3 i mprovement. c rop f or u sed t echnology t his N ame (c) to w h nRNA ? ~ m m ~ 3 =llq~(.j~<:11 ~~I (c) followed orms f h nRNA ( i) ~~I<:1~1 ilarial o f s pecies t wo t he YRqa-i1 (ii) scientists ~ ~ i o f I ~ ~ nfected o f b ody n ames s cientific t he W rite (i) the ~ s pread? f ilariasis. causing (ii) procedure ~ ~ ~ t he a ffect t hey d o H ow ( i) m-;r ? ' d isease t he d oes H ow ( ii) ~ ~ ~ ~ ~ fqj -q~~fuq;r ~ ~ ~ ~~ ~ qj) ~ I~~R~I~ (iii) 22. the ~ ~I (i) ~ ~ ~ ~ ~ (ii) 23. Describe ~ ~ ~ \ T1T ~ (iii) r (b) recover I ~ s cientists. t he b y e xplant a s u sed p lant t he o f p art t he N ame (a) a diseased one. the healthy plants. ~ ~ ~ ~ "!:f;~~ ~ ~~fi ~~rn~ ~ P.T.D. f rom p lants s ugarcane h ealthy r ecovering i n s ucceeded h ave S cientists 2 1. ";Jfffi ~I ~ ~ ~ ~~ and animals which enable i n r ole t heir D u sed t ~ erms t he o f s ome ~ 3 ~ ~ ~ ~ ~ of each one of them. ~ 3 ~ I ~~~I~l!, 26. Water is very essential for life. Write plants escribe. b elong. a i:f~ :j-q~ features ~ m the salient ~ , 3 :j~ ~ ~~fiT(:f; ~ ~ for the genetic code. Explain re 3tff1fff ~~I~I~ < 1rff I 1:;~ ~ 3~ d u niversal U nambiguous, ~ 3 programmes. ~ ~ ~~~I~l!, I "q)T ~ i:f ~ b management egenerate (~) aculoviruses w hich t o g pest a ~ ~ 25. enus t integrated nd ~ he N ame 2 4. the any three features both for them to survive in water scarce 3 c onditions e nvironmental e xternal s tressful w ith c ope o rganisms d o How OR environment. which are localised or of short duration? ~ ~ ~~ ~ ~ ~ ~-3:rI:rfq ~ I ~ aW~ aTfir(f:j~ 3 ~ ~ ~ ~ l.j(.jf~~ul ~ ~ ~ -!tit~ "ffi;rffi;r ~ -" ~~ I ~ 27. l ~~ ";jf)~ ~ 3rl:fqr m"ffi ~~~II~~ ~ .j(.jf~(un(.j -qft~ ~~~~? ~ "(,!~1~ mm~, ~ (i) State the consequence if the electrostatic precipitator of a thermal (ii) Mention any four methods by which the vehicular air pollution plant fails to function. . ~ m ~ " q)'{ ~ - q;-{;:rT " qjl1:I" 3 :rq~ ~ - ~ " q)T r n ~ - ~ "ffitf ~ 3 ~I (i) can be controlled. ~~ ~ faf~ ~ ~~mr"::Jlr~~ ~ ~ ~ f;rqj~ ~ ""qrJ ~ - ~ .L - 8 - ~ ~ ~ I 57/1 ;:::::: ~ -' (ii) 28. Give (i) reasons why: most zygotes endosperm (ii) in is groundnut angiosperms divide only after certain amount of formed. seeds are exalbuminous and castor seeds are j albuminous. 5 f is highly ruits. t rue content OR c Draw and the water alled (a) n apple ot (v) a integuments of an ovule harden reduced, as the seed matures. re (iv) c as a small pore in the seed coat of a seed. ashew remains a Micropyle nd (iii) a labelled diagram pf L.S. of an embryo of grass (any six labels). Give reason for each of the following: (ii) Hybrid ~ ~ ~ i ~ ~ " (fIft I i ~ ~ ~ ~ ~ I i ~ ~ ~ ~ ~ ~ ~I~-1~~ ~ ~ 1\J1IU-S~I( ~ I ~ I ~ ~ 9 P 57/1 .T.D. ~ - q:)"R ~ I~I~~ - qj) ~ ~ "(f?;rT (v) ~ t ~ -~ ~ 3 1ts ~ ~ - q ~ m m ( y f{y~ ~I\J1I~(UI) "(f?;rT ~ I m : ~ ~ - q ~ ~ ~ -~ ~ ~ 1 ~ ~ ~~I~-1QI-1 ~~~~~~m~~ (iv) (iii) -~ (ii) {1~ ~~~~~~mm~ 1"J:R;:jf q )T"{UT - 311~{1~II\J1~1 (i) of angiosperm flowers are described as dithecous. seeds have to be produced year after year. q 1-1~I{1I~{1 ~ Anthers ~ (i) ~ (b) , . ' ~D D SECTION the foetus she is carrying - b y M.T.P. It " can <ft ? T .P. f ertilized female ~ Q I~I~II~~I I M . human ~ ~ ~ ? ~ undergo x m ~ X X-egg a n a human x-3:{fi?; ~ I q uf;r u ndergo t o in ? ~ "(f " \1ffi'fT ' q;f observed ~ " ~ ~~I~~ to <ft ( M.T.P.) b y f ormed advised ~ ~ ~ a dvised s he diagnosed by her doctor that ~ 1 ~~IICfI't,:f ~ was , ~ 3t~ which ~ ~ ~IYr1 ~ m ~ w as under ~ - ~ 3 1r ~ ~ generally ~ ~ Y 1 T.jfCf;~I~ ' qjT ~ z ygote a female 1 ' \3lT ~ m 3rf W hy conditions m . ~ 31r ~ ~lljlld f rom haemophilia P. T M ~ s perm. human . ~ ~ q iif pregnant ~ ~ 1~I~d: the ~ ~ m ?J developed Explain ~ ~ - carrying Y is ~ ~ ~ A BO ~ OR g roups b lood A BO o f i nheritance o f p attern o f m echanism t he D escribe I ~ ~ " ;;jfRT ~ ~ ~ G "{ ~ ~ ~ ~ (ii) I ~ " \1ffi'fT - q;m I ~YII~CfI ~ Y ~ljICflI~n ~ ~ ~ 3 :j1~d<S!II~~1 (i) : ~ " q:jT"{UT ' qjT ~ ~ ~ R~I~I~d ~ ~ ~ Q I~I~II~~I A ~ M (b) ~ Why I ~1~~~~~~~fCfi~~~lfIf~~~~~ ~ (a) ~ ~ (a) in ~ ~ (b) 29. (b) 0 57/1 I ~ ) r 11~iCflr1 ~ ( ~ ~ ~ r 11~iICfld ' qjT ~ .S. ~ ~ ~ ~ ~ (a) - - , humans. 5 males? be haemophilic. was has - "' t ~ " 5 ~ E r ecomb'inant u p xplain. p ossess. m ust m t ake t o embrane? v ector c ell t he c loning a ' competent' t hrough m ade p c OR m edium? ell ass c haracteristics c annot t he b t he acterial D a i f rom s NA D escribe hy DNA How W ( i) (ii) W. ;ti' red gene is identified in an organism for some experiments, he processof the following: tting this desired gene at specific location (ii) ~ ~ ~ fCfi DNA -q))fuq;r # f$Jffi ~ ~ ~ ~ -q))fuq)T ~ q)) ~ # ~ ~:jf;ft '\3WfT ~ ? "GAT ~ '~' ~ ~~ I ~ q uR ~1~I~tll~ ~ ~-~ , # ~ q ~ ..(1lrictlltl ~ (i) thesis of multiple copies of this desired gene ? ~ DNA q)) ~ ~1.-i~1~~ I ~~ ~ ~ \ ~ ~ R ~ ~I~I(gd ~ ~ ' ;j'fRT ~ ~ ' q)T ' qjTl"T ~ ~ > lltll~fq~1 ~ ~ ~ " Cf{ ~ ~ ~ ~ ) i #~ ~ ~ # ~1.-i~1~~ : ~~ ~ (ii) ( ~ifr ~ ~ ~ ~~~ m 3T~ ~ '~~ , t! ~i!c:! " '. ~ --- ..-: - --, - !!c . - I- 11 - 57/1 i

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