Kcet 2014 Biology Answer Key & Solutions

download Kcet 2014 Biology Answer Key & Solutions

of 12

Transcript of Kcet 2014 Biology Answer Key & Solutions

  • 8/12/2019 Kcet 2014 Biology Answer Key & Solutions

    1/12

    1

    KCET BIOLOGY 2014

    VERSION CODE: A 1

    1. Making of two varieties of a cattle breed like Red Dane which have no common ancestors oneither sides of their pedigree up to 4 6 generations is an example for

    !1" #nbreeding !$" %ross breeding!&" 'ut crossing !4" #nter(specific h)bridi*ationAns: (3)

    #nbreeding involves mating of males and females of the same breeds closel) related to eachother. %ross breeding involves mating of males and females of two different breeds. #nter(specific h)bridi*ation mating of males and females of two different species.

    $. #dentif) the hormones+ ,- + ,/ and ,% that are labelled in the given flow chart0

    !1" -( nR2+ / ( #%32+ % 32

    !$" -( 2+ / ( 32+ % 52

    !&" -( nR2+ / ( R5+ % #%32

    !4" -( nR2+ / ( 32+ % 52

    Ans: (4)

    &. Statement (A): hotorespiration decreases photos)nthetic output.Statement (B): #n photorespirator) pathwa)+ neither -7 nor 8-D 2 is produced.!1" /oth the statements - and / are correct!$" /oth the statements - and / are wrong!&" 3tatement !-" is correct and statement !/" is wrong!4" 3tatement !/" is correct and statement !-" is wrong

    Ans: (1)hotorespiration light dependent reaction in %(& plants where ox)gen is consumed and

    carbon dioxide is reduced.

    4. #dentif) the incorrect statement from the following0!1" 7he reservoir pool for phosphorus c)cle is earth s crust whereas atmosphere is thereservoir pool for carbon c)cle.!$" During carbon c)cle and hosphorus c)cle+ there is ver) little respirator) release ofcarbon and phosphorus respectivel)!&" -tmospheric inputs of phosphorus throughout rainfall are much smaller than carboninputs.!4" aseous exchanges of phosphorus between organism and environment are negligible.

    Ans: (2)

    29 '72-5-M:3

    -

    #7:#7-R9

    / %

    ';-R9 7

  • 8/12/2019 Kcet 2014 Biology Answer Key & Solutions

    2/12

    2

    =. 7he result of the following reaction> experiment carried out b) -ver) et. -l. on Streptococcus pneumoniac has proved conclusivel) that D8- is the genetic material?!1" 5ive ,R strain @ D8- from ,3 strain @ D8-ase!$" 2eat killed ,R strain @ D8- from ,3 strain @ D8-ase!&" 5ive ,R strain @ D8- from ,3 strain @ R8-ase!4" 5ive ,R strain @ Denatured D8- of ,3 strain @ protease

    Ans: (1) 5ive ,R strain @ D8- from ,3 strain @ D8-ase ( ,3 strain is not formed

    6. Match the storage products listed under %olumn # with the organisms given under%olumn ##? choose the appropriate option from the given choices.

    Column I Column II

    (A) l)cogen (p) Sargassum

    (B) )renoids (q) Nostoc

    (C) 5aminarin and mannitol (r) Polysiphonia

    (D) loridean starch (s) Spirogyra

    (t) Agaricus

    !1" !-" !r"? !/" !s"? !%" !p"? !D" !t"!$" !-" !s"? !/" !r"? !%" !t"? !D" !A"!&" !-" !t"? !/" !s"? !%" !p"? !D" !r"!4" !-" !A"? !/" !p"? !%" !s"? !D" !r"

    Ans: (3)

    B. #dentif) the desirable characteristics for a plasmid used in rD8- technolog) from thefollowing0-. -bilit) to multipl) and express outside the host in a bioreactor

    /. - highl) active promoter%. - site at which replication can be initiatedD. 'ne or more identifiable marker genes

  • 8/12/2019 Kcet 2014 Biology Answer Key & Solutions

    3/12

    3

    F. hich of the following is true for eutrophicated water bod)E!1" 2igh mineral content !$" 2igh ox)gen content!$" Rich species diversit) !4" 5ow organic content

    Ans: (1) 8utrient enrichment of water bod) is called eutrophication.

    1G. #:Ds which are used b) females

    !1" act as spermicidal Hellies!$" block the entr) of sperms into vagina!&" are implanted under the skin and the) release progestogen and estrogen!4" release copper ions in the uterus that increase phagoc)tosis of sperms

    Ans: (4) #nert intrauterine devices release copper ion in the uterus that increases phagoc)tosis ofsperms

    11. hich of the following hormones are secreted in large Auantities during pregnanc) inwomenE!1" h% + progesterone+ estradiol and 32!$" h% + h 5+ progesterone+ estrogen and 52

    !&" 52+ estrogen and estradiol!4" h% and h 5

    Ans: (4)32 and 52 secreted b) anterior pituitar)+ during pregnanc) progesterone inhibits secretion

    of nR2.

    1$. 7he kind of coelom represented in the diagram given below is characteristic of 0

    !1"

  • 8/12/2019 Kcet 2014 Biology Answer Key & Solutions

    4/12

    4

    Ans: (2)3eparation of factors takes place during gamete formation and during gametogenesis meiosistakes place.

    1=. #nternal bleeding+ muscular pain+ blockage of the intestinal passage and anemia are some ofthe s)mptoms caused due to infection b) !1" Wuchereria !$" Trichophyton !&" Ascaris !4" Plasmodium

    Ans: (3) Ascaris infects intestine. Wuchereria causes filariasis. Trichophyton causes ringworm.Plasmodium causes malaria.

    16. R8- interference which is emplo)ed in making tobacco plant resistant to Meloidegyneincognita is essentiall) involved in !1" preventing the process of translation of mR8-!$" preventing the process of transcription!&" preventing the process of replication of D8-!4" preventing the process of splicing of hnR8-

    Ans: (1)

    /iological process in which R8- molecules inhibit gene expression b) causing destruction ofmR8-.

    1B. 7he success of mammals on earth is largel) because ?!1" 7he) can conform to the changes in the environment.!$" 7he) can reduce metabolic activit) and go into a state of dormanc) during unfavourableconditions in the environment.!&" 7he) have the abilit) to maintain constant bod) temperature.!4" 7he) can take care of their )oung ones as the) have mammar) glands to suckle them.

    Ans: (4)

    1C. hich one of the following hormones also produces ant(inflammator) reactions in man andsuppresses the immune response in addition to its primar) functionsE!1" %ortisol !$" 7h)mosin !&" 7h)rocalcitonin !4"

  • 8/12/2019 Kcet 2014 Biology Answer Key & Solutions

    5/12

    5

    $G. Marchantia is considered as a heterothallic plant because it is !1" 2eterogametic !$" /isexual !&" Monoecious !4" Dioecious

    Ans: (4)Marchantia is dioecious where the male plant bears -ntheriodiophore+ female plants bears-rchegoniophore.

    $1. #dentif) the set of characteristics related to plants belonging to famil) abaceae from the

    following 0!1" -ctinomorphic flower+ s)ncarpous ovar) and marginal placentation!$" ersistent cal)x+ epipetalous stamens and leguminous fruit!&" apilionaceous corolla+ axile placentation and leguminous fruit!4" vexillar) aestivation of corolla+ diadelphous stamens and monocarpellar)+ unilocular ovar)

    Ans: (4)lants belonging to the famil) abaceae shows descending imbricate aestivation of corolla+

    stamens 1G !!F" @ 1 condition" and marginal placentation.

    $$. 'ne of the following statements is incorrect with reference to biodiversit). #dentif) it.!1" /iodiversit) increases with higher altitudes to lower altitudes

    !$" Depletion in genetic diversit) of crop plants is mainl) due to the introduction of bettervarieties with high )ield+ disease resistance+ etc.!&" 7he richest reservoirs of animal and plant life !species richness" with few or nothreatened species are called Ibiodiversit) hotspotsJ.!4" /iodiversit) decreases from the eAuator to polar regions.

    Ans: (1)

    $&. #n castor and mai*e plants+ KKKK!1" autogam) is prevented but not geitonogam)!$" both autogom) and geitonogam) are prevented!&" male and female flowers are borne b) different plants!4" the anthers and stigma are placed at different positions to encourage cross pollination

    Ans: (1)#n mai*e and castor flowers are unisexual. -utogam) and geitonogam) are prevented inCarica papaya

    $4. #n garden pea+ round shape of seeds is dominant over wrinkled shape. - pea planthetero*)gous for round shape of seed is selfed and 16GG seeds produced during the cross aresubseAuentl) geminated. 2ow man) seedlings would have the parental phenot)peE!1" 16GG !$" CGG !&" 4GG !4" 1$GG

    Ans: (1)#n $ generation total number of plants produced are 16GG !both dominant and recessiveindividuals"

    $=. hich of the following events would occur in ,5ac(operon of

  • 8/12/2019 Kcet 2014 Biology Answer Key & Solutions

    6/12

    6

    $6. 7he mature infective stages of malarial parasite which are transferred from mosAuito to manare KKK.. .!1" 3poro*oites !$" Mero*oites !&" 7ropho*oites !4" ametoc)tes

    Ans: (1)#t is found from *)gote b) multiple fusion are found in the salivar) glands of mosAuito.

    $B. 'ne of the following refers to -llen s rule0!1" #f the stressful conditions are locali*ed or remain onl) for a short duration+ an organismeither migrates or suspends itself.!$" Mammals from colder climates have shorter ears and limbs to minimi*e heat loss.!&" -n organism can move form a stressful habitat to a more hospitable area and returnwhen the stressful period is over.!4" 5ow atmospheric pressure in higher altitudes results in altitude sickness.

    Ans: (2)

    $C. #dentif) the D8- segment which is not a palindromic seAuence0!1" = --77% &

    & %77-- =!$" = %%% =

    & %%% &!&" = -7%% &

    & 7-%% =!4" = % %% % &

    & % %% % =Ans: (3)

    3eAuence of nitrogen bases that reads same in = L to & L and & L to = L of complementar) strandof double helix.

    $F. During somatic h)bridi*ation in plants+ KKKK .!1" somaclones are produced in large numbers!$" the apical meristems are cultured to get virus(free plants!&" the cell walls and the middle lamella are digested before fusing the cells!4" crop plants with higher levels of vitamins+ proteins and minerals are h)bridised

    Ans: (3)#n somatic h)bridi*ation plant protoplast are used. 7he) are obtained b) treating the plantcells with cellulase and pectinase.

    &G. Statement A: 7he secretion of collaterial gland forms the egg case in cockroach.Statement B: 7he development in cockroach in hemimetabolous.!1" /oth the statements - and / are correct and / is the reason for -.!$" /oth the statements - and / are correct and / is not the reason for -.!&" 3tatement - is correct and statement / is wrong.!4" 3tatement / is correct and statement - is wrong.

    Ans: (2)%ollaterial gland present between the third and fourth abdominal segment of femalecockroach that forms egg case. 2emimetabolous t)pe of development is incompletemetamorphosis in which )oung does not resemble the adult. 5ife c)cles includes three stagesnamel) egg+ n)mph and adults.

    &1. #f a plant produces flowers when exposed onl) to alternating periods of = hours light and &hours dark in a $4 hour c)cle+ then the plant should be a KKK. .!1" 3hort da) plant !$" 5ong da) plant!&" 3hort(long da) plant !4" Da) neutral plant

    AglaSem Admis

    http://admission.aglasem.com/http://admission.aglasem.com/
  • 8/12/2019 Kcet 2014 Biology Answer Key & Solutions

    7/12

    7

    Ans: (2)5ong da) plants have photoperiod more than 1$ hours per da).

    &$. #f there was no carbon dioxide in the earth s atmosphere+ the temperature of the earth ssurface would be KKK. .!1" same as the present level!$" more than the present level!&" less than the present level!4" dependent on the ox)gen content in the atmosphere

    Ans: (3)%arbon dioxide is the maHor green house gas trapping heat on earth surface.

    &&. 'ne of the following is incorrect about cancer cells0!1" 7he) exhibit the propert) of contact inhibition.!$" 7he) are metastatic.!&" 7he) exhibit mass proliferation.!4" 7he) are produced when cellular oncogenes of normal cells are activated.

    Ans: (1)7he cancerous cells have no contact inhibition. 7he) spread from one part of bod) to other.2ere proto(oncogene is activated into oncogene and tumour suppressor gene is inactivatedb) mutations.

    &4. 7he centrosome duplicates during the KKK. .!1" 3 phase of cell c)cle !$" 1 phase of cell c)cle!&" $ phase of cell c)cle !4" rophase of cell c)cle

    Ans: (1)7his is in the phase of D8- s)nthesis.

    &=. Match the items listed under %olumn # with those given under %olumn ##? %hoose theappropriate option form the given choices.

    Column I Column II -. Residula ;olume !R;" . 4GGG ml 46GG ml/. #nspirator) Reserve ;olume !#R;" . 11GG ml 1$GG ml%. ;ital %apacit) !;%" R. 1GGG ml 11GG mlD.

  • 8/12/2019 Kcet 2014 Biology Answer Key & Solutions

    8/12

    8

    &B. 3ickle cell anaemia is caused due to the substitution of KKK. .!1" ;aline at the 6 th position of alpha globin chain b) glutamic acid!$" lutamic acid at the 6 th position of beta globin chain b) valine!&" ;aline at the 6 th position of beta globin chain b) glutamine!4" l)cine at the 6 th position of alpha globin chain b) glutamic acid

    Ans: (2)

    &C. Statement A: 7he primar) transcript produced in eukar)otes is translated withoutundergoing an) modification or processing.Statement B: 7he hnR8- in humans has exons and introns.

    !1" /oth the statements - and / are correct!$" /oth the statements - and / are wrong.!&" 3tatement / is correct and statement - is wrong.!4" 3tatement - is correct and statement / is wrong.

    Ans: (3)7he primar) transcript undergoes splicing+ capping and tailing in eukar)otes.

    &F. Nnee Hoint is an example for KKKKK .!1" /all and socket Hoint !$" 2inge Hoint!&" ivot Hoint !4" liding Hoint

    Ans: (2)!1" is between humerus and pectoral girdle. !&"is between atlas and axis !4" is presentbetween carpals.

    4G. %arefull) read the following reactions carried out b) nitrogen fixing bacteria. #dentif) thestatement about these eAuations which is not true0$82 & @ &' $ $ O 2

    @ $2 @ @ $2 $ ' KKK.. !-"

    $ O 2 @ ' $ $ O 3

    KKK. !/"

    !1" 3tep !-" is carried out b) Nitrosomonas or Nitrococcus.!$" 3tep !/" is carried out b) Nitrobacter.!&" /oth the steps !-" and !/" can be called nitrification.!4" /oth the steps occur onl) in photoautotrophs.

    Ans: (3)7hese bacteria convert the ammonia into nitrite.

    41. Match the vegetative propagules listed under %olumn(# with the plants given under%olumn(##? choose the appropriate option from the given choices.

    Column I Column II

    - Rhi*ome p Agave

    / 'ffset A Bryophyllum

    % 3ucker r ingerD 5eaf buds s Chrysanthemum

    t Eichhornia

    !1" - r+ / s+ % p+ D A !$" - s+ / t+ % A+ D r!&" - r+ / t+ % s+ D A !4" - A+ / p+ % t+ D s

    Ans: (3)

    AglaSem Admis

    http://admission.aglasem.com/http://admission.aglasem.com/
  • 8/12/2019 Kcet 2014 Biology Answer Key & Solutions

    9/12

    4$. 'ne of the following causes population explosion0!1" Decrease in death rate+ maternal mortalit) rate and infant mortalit) rate!$" Decrease in death rate and increase in maternal mortalit) rate!&" Decrease in infant mortalit) rate and increase in death rate!4" Decrease in infant mortalit) rate and decrease in the number of people in reproductiveage.

    Ans: (1)

    4&. are the most abundant proteins in the living worls.!1" Ribo*)me of plants and collagen of animals!$" Ru/is%' of plants and collagen of animals!&" < case of plants and keratin of animals!4" -lcohol deh)drogenase of plants and melanin of animals

    Ans: (2)

    44. 'ne of the chief reasons among the following for the depletion in the number of speciesmaking it endangered is !1" reenhouse effect !$" 2abitat destruction!&" 'ver(hunting and poaching !4" %ompetition and predation

    Ans: (2) 2abitat destruction and habitat fragmentation are the maHor reasons are depletion of speciesdiversit).

    4=. #n humans+ what is the ratio of number of gametes produced from one male primar) sex cellto the number of gametes produced from one female primar) sex cellE!1" 1 0 1 !$" 1 0 & !&" 1 0 4 !4" 4 0 1

    Ans: (4) our sperms are formed from one primar) spermatoc)te but onl) one egg is formed from

    primar) ooc)te.

    46. #dentif) the incorrect statement from the following0!1" )ramid of energ) is mostl) upright+ but sometimes it ma) be inverted!$" )ramids of number and biomass ma) be either upright or inverted!&" )ramid of biomass in sea is generall) inverted as the biomass of fish far exceeds that ofph)toplanktons!4" ood chains are generall) short with few trophic levels as onl) 1GO of the energ) istransferred to each trophic level from the lower trophic level.

    Ans: (1) 7his is due to ## law of thermod)namics.

    4B. Match the organic compounds listed under %olumn( # with the explanation given under

    %olumn(##? choose the appropriate option from the given choices.

    Column I Column II

    - hosphoenol p)ruvate ! < " p 6 carbon compound

    / Ribulose biphosphate !Ru/ " A $ carbon compound

    % 'xaloacetic acid !'--" r 4 carbon compound

    D -cet)l co(en*)me - s = carbon compound

    t & carbon compound

    AglaSem Admis

    http://admission.aglasem.com/http://admission.aglasem.com/
  • 8/12/2019 Kcet 2014 Biology Answer Key & Solutions

    10/12

    1!

    !1" - r+ / s+ % t+ D p !$" - A+ / r+ % s+ D t!&" - t+ / s+ % r+ D A !4" - t+ / p+ % A+ D r

    Ans: (3)

    4C. Down s s)ndrome is an example for !1" -neuploid) of sex chromosome!$" -neuploid) of autosome

    !&" 3)ndrome caused due to gene mutation!4" 5oss of one sex chromosome from the diploid set

    Ans: (2) 2ere+ there is extra $1 st chromosome.

    4F. 7he interaction between the organisms of one of the following pairs is an example forcommensalism0!1" asps and fig tree !$" %uckoo and crow!&" %attle or sheep and grass !4" 'rchid and mango tree

    Ans: (4) 2ere 'rchid gets support but mango is neither harmed nor benefitted.

    =G. 7he germ pores in the pollen grain are the regions !1" 7hat can withstand high temperature and strong acids and alkalies!$" 7hrough which sperms are released into the female gametoph)te!&" hich are made up of lignin and suberin!4" hich lack sporopollenin

    Ans: (4) 7his is the region without exine.

    =1. 2eroin is !1" - cannabinoid !$" Diacet)lmorphine !chemicall)"!&" %ommonl) called ,coke or ,crack!4" :sed to treat mental illnesses like depression and insomnia

    Ans: (2) #t is s)nthesi*e from diac)t)lation of morphine

    =$. 7horns of Bougainvillea and tendrils of Cucurbita are examples for !1" %onvergent evolution !$" Divergent evolution!&" -daptive radiation !4" %o(evolution

    Ans: (2) 7he) are homologous.

    =&. 3ome of the steps of D8- fingerprinting are given below. #dentif) the correct seAuence fromthe options given0-.

  • 8/12/2019 Kcet 2014 Biology Answer Key & Solutions

    11/12

    11

    =4. , locks is !1" 7he primar) sludge produced in sewage treatment!$" - t)pe of biofortified food!&" - mesh(like structure formed b) the association of bacteria and fungal filaments insewage treatment!4" 7he effluent in primar) treatment tank obtained during sewage treatment

    Ans: (3)

    ==. -D- deficienc) results in !1" #ncreased risk of infertilit) !$" #nabilit) of the immune s)stem to function normall)!&" %hromosomal disorders !4" Decrease in the )ield of crop plants

    Ans: (2) #t is called 3%#D !3evere %ombined #mmuno Deficienc) Disease"

    =6. arbhani kranti+ a variet) of bhindi !lad) s finger"+ is resistant to !1" /acterial blight !$" )ellow mosaic virus!&" /lack rot !4" 5eaf curl

    Ans: (2)

    =B. 7he globular head of m)osin contains !1" %alcium ions in large Auantities !$" 7roponin!&" -7 ase en*)me !4" -7

    Ans: (3) M)osin head has actin binding site and -7 binding site.

    =C.

  • 8/12/2019 Kcet 2014 Biology Answer Key & Solutions

    12/12

    For All Answer Keys

    AndSolved KCET Papers

    Visit

    http://admission.aglasem.com/kcet-question-papers-with-answers/

    http://admission.aglasem.com/kcet-question-papers-with-answers/http://admission.aglasem.com/kcet-question-papers-with-answers/http://admission.aglasem.com/kcet-question-papers-with-answers/http://admission.aglasem.com/kcet-question-papers-with-answers/http://admission.aglasem.com/kcet-question-papers-with-answers/