12th Biology Model Paper 2021 PDF

INTERMEDIATE EXAMINATION – 2021 (ANNUAL) 119 Model Set Time :- 3 Hours 15 minutes Full Mark - 70 le; % 3 ?kaVs 15 feuV BIOLOGY...

INTERMEDIATE EXAMINATION – 2021 (ANNUAL) 119 Model Set Time :- 3 Hours 15 minutes Full Mark - 70 le; % 3 ?kaVs 15 feuV BIOLOGY iw.kkZad & 70 Total No. of questions – 70 + 20 + 6 = 96 dqy iz’uksa dh la[;k & 70 $ 20 $ 6 ¾ 96 Instructions for the candidates :- 1- ijh{kkFkhZ ;FkklaHko vius 'kCnksa esa gh mÙkj nsaA Candidates are required to give answers in their own words as far as practicable. 2- nkfguh vksj gkf’k;s ij fn;s gq, vad iw.kkZad fufnZ"V djrs gSaA Figures in the right hand margin indicate full marks. 3- mÙkj nsrs le; ijh{kkFkhZ ;FkklaHko 'kCn&lhek dk /;ku j[ksaA While answering the questions, candidate should adhere to the word limit as far as practicable. 4- bl iz’u i= dks /;kuiwoZd irs gSa \ fdUgha nks fof/k;ksa ds uke crk,¡A 2 What do you understand by sterilization? Name any two methods. 7- fdUgha pkj vkuqoaf’kd jksxksa ds uke crk,¡A 2 Name any four genetic diseases. 8- fuEukafdr dks ifjHkkf"kr dhft, % 2 A. lgizHkkfork B. viw.kZ izHkkfork C. izHkkoh D. vizHkkoh Define the followings : 27  A. Co-dominance B. Incomplete Dominance B. Dominant D. Recessive 9- vksisjkWu dks ifjHkkf"kr dhft, rFkk blds la?kVd thuksa dk uke crkb;s A 2 Define the operon and name its constituent genes. 10- fofHkUu izdkj ds vkj ,u , ds uke crkb;sA 2 Name the different types of RNAs. 11- tho dks’k ls D;k le>rs gSa \ 2 What do you understand by Gene pool ? 12- vilkjh rFkk vfHklkjh fodkl esa varj crk,¡A 2 Explain the difference between divergent and convergent evolution. 13- rhu ladVkiUu tkfr;ksa dh Jsf.k;ksa dks mnkgj.k lfgr ifjHkkf"kr dhft,A2 Define the categories of three threatened species with examples. 14- ihM+d&izfrjks/kh ikS/kk D;k gS \ laf{kIr fooj.k nhft,A 2 What is pest resistant plant ? Give brief description. 15- [kk| J`a[kyk ls D;k le>rs gSa \ fdUgha nks izdkj dh [kk| J`a[kyk dk uke crkb,A 2 What do you understand by Food-chain ? Name any two types of food-chains. 16- fuEukafdr jksxksa ds jksxtud dk uke fyf[k,A 2 28  A. vehfc;kfll B. eysfj;k C. ,Ldkfj;kfll D. U;weksfu;k Write the name of the causal organism of the following diseases. A. Amoebiasis B. Malaria C. Ascariasis D. Pneumonia 17- tSo moZjd fdl izdkj ls e`nk dh moZjrk dks crs gSa\ ySd vksisjkWu dks lfp= le>k,¡A 5 What do you understand by operon concept ? Explain the Lac- operon with the help of diagram. 22- fuEukafdr iz’uksa ds mÙkj nsa %& ¼1$ 2 $ 2¾ 5½ A. ,dhd`r ihM+d izca/ku ls D;k le>rs gSa \ B. eqxhZikyu D;k gS\ blds ykHk fyf[k,A C. lw{e iztuu ls D;k le>rs gSa\ blds ykHk fyf[k,A Answer the following questions :- A. What do you understand by integrated pest management ? B. What is poultry ? Write its benefits. C. What do you understand by micropropagation? Write its benefits. 23- fuEufyf[kr esa varj Li"V djsaA ¼2½ x 2 = 5½ A. izfrtSfod rFkk baVjQsjkWu B. tSo moZjd rFkk ck;ksxSl Differentiate the following : A. Antibiotic and interferon. B. Biofertilizer and Biogas. 24- fuEukafdr esa ls fdUgha nks dk o.kZu djsa %& ¼2½ x 2 = 5½ A. thu fofue; 30  B. eSlsYlu rFkk LVkWy dk iz;ksx C. LFkkukukUrj.k vkj ,u , dk izlaLdj.k D. thok.kqHkksth dk ykblkstsfud pØ Describe any two of the following :- A. Crossing over B. Meselson and Stahl’s experiment C. Processing of tRNA D. Lysogenic cycle of Bacteriophage 25- fuEukafdr esa fdUgha nks dks dsoy fp= }kjk n’kkZ,¡ %& ¼2½ x 2 = 5½ A. thok.kq dksf’kdk esa f}fo[k.Mu B. lelw=h foHkktu dh esVkQst voLFkk C. vko`Ùkchth ikni ds chtk.M dh lajpukA Show any two with the help of labelled diagram/sketch only. A. Binary fission in Bacterial cell. B. Metaphase stage of mitotic cell division. C. Structure of ovule of an Angiospermic plant. 26- fuEukafdr dks ifjHkkf"kr djsa 1x5=5 A- thukse B- cgq&fodYirk C- ?kkrd thu 31 D. xq.klw= foiFku E. o.kkZU/krk Define the followings :- A. Genome B. Multiple allelism C. Lethal gene D. Chromosomal aberrations E. Colour blindness 32