Class 12 Biology Past Paper PDF 2024-25

>kj[k.M 'kSf{kd vuqla/kku ,oa izf'k{k.k ifj"kn~] jk¡ph (Jharkhand Council of Educational Research and Training, Ranchi) PROJECT RAIL (REGULAR ASSESSMENT FOR IMPROVED LEARNING) GENERAL SCHOOL fo"k; (sub)...

>kj[k.M 'kSf{kd vuqla/kku ,oa izf'k{k.k ifj"kn~] jk¡ph (Jharkhand Council of Educational Research and Training, Ranchi) PROJECT RAIL (REGULAR ASSESSMENT FOR IMPROVED LEARNING) GENERAL SCHOOL fo"k; (sub) – thofoKku (Biology) d{kk (Class)&12 le; (Time) - 90 Min. iw.kkZad (Marks)&40 lkekU; funsZ'k %& 1- lHkh iz'uksa ds mÙkj nsuk vfuok;Z gSA (All questions are compulsory.) 2- bl iz'u&i= esa dqy 16 iz'u gSaA (The total no of question is 16.) 3- çR;sd oLrqfu"B iz'u ds fy, 2 vad] vfr y?kq mÙkjh; iz'u ds fy, 2 vad] y?kq mÙkjh; iz'u ds fy, 3 vad vkSj nh?kZ mÙkjh; iz'u ds fy, 5 vad fu/kkZfjr gSA (There are 2 marks for each objective question, 2 marks for very short answer question, 3 marks for short answer question and 5 marks for long answer question.) 4- xyr mÙkj ds fy, dksbZ _.kkRed vad ugha gSA (There is no negative marking for any wrong answer.) 5- oLrqfu"B iz'u 1 ls 10 ds fy, pkj fodYi fn, x, gS] lgh fodYi ¼aa, b, c, d½ dk p;u dj mÙkj iqfLrdk esa fy[kuk gSA (Objective question 1 to 10 has four options, choose the correct option's (a, b, c, d) and write down in the answer sheet.) 6- vfr y?kq mÙkjh; iz'u 11ls 12] y?kq mÙkjh; iz'u 13 ls 14] vkSj nh?kZ mÙkjh; iz'u 15 ls 16 dk mÙkj viuh mÙkj iqfLrdk esa fy[kuk gSA (Write the answer to very short answer question 11 to 12, short answer question 13 to 14, and long answer question 15 to 16 in your answer sheet.) 7- ijh{kk dh lekfIr ls igys fdlh Hkh ijh{kkFkhZ dks ijh{kk d{k ls ckgj tkus dh vuqefr ugha gksxhA (No students shall be allowed to leave the examination hall before the completion of the exam.) SECTION - A (10x2=20) oLrqfu"B ç'u (Objective Question) 1- ekuo esa Øksekslkse dh dqy la[;k gS %& (The total number of chromosomes in a normal human cell is :-) (a) 46 (b) 23 (c) 23 tksM+k (23 Pairs) JCERT, Ranchi Session: 2024-25 Class-12 Subject- Biology Page 1  (d) 22 tksM+k (22 Pairs) 2- dksf'kdk foHkktu ds le; ØkseVs sM ds fola;kstu dh vuqifLFkfr ds dkj.k ,d Øksekslkse dh vf/kdrk ;k gkfu dgykrk gS %& (Failure of segregation of chromatids during cell division cycle results in the gain or loss of chromosomes called :-) (a) vlqxqf.krk (Aneuploidy) (b) cgqxqf.krk (Polyploidy) (c) lkbVksdkbusfll (Cytokinesis) (d) dkfj;ksdkbusfll (Karyokinesis) 3- og fodkj ftlesa gheksXyksfcu v.kq dh chVk Xyksfcu J`a[kyk dh NBh fLFkfr esa XywVkfed vEy dk oSfyu }kjk çfrLFkkiu gksrk gS] dgykrk gS %& (The defect caused by the substitution of glutamic acid by valine at the sixth position of the beta globin chain of the haemoglobin molecule is called :-) (a) fldy lsy ,uhfe;k (Sickle cell anaemia) (b) gheksQhfy;k (Haemophilia) (c) FkSyslhfe;k (Thalassemia) (d) fQukby dhVksuwfj;k (Phenylketonuria) 4- FkSyslhfe;k ,d %& (Thalassemia is :-) (a) vfyax Øksekslkse layXu vçHkkoh thu jä fodkj gS (An autosome linked recessive blood disease) (b) fyax lgyXu vçHkkfor fodkj (Sex linked recessive disease) (c) tUetkr mikip;h =qfV (inhorn error of metabolism) (d) dksbZ ugha (None) 5- Mkmu flaMªkse dks loZçFke fdlus [kkstk Fkk\ (Downs syndrome was first discovered by) (a) ysUxMu Mkmu (Langdon Down) (b) esM a y (Mandel) (c) VuZj (Turner) (d) dksbZ ugha (None) 6- og fodkj ftlesa ,d X Øksekslkse dk vHkko gksrk gS vFkkZr 45 Øksekslkse dh XO fLFkfr gksrh gS %& (Disorder caused due to the absence of one of the X chromosome i.e, 45 with XO is known as :-) (a) VuZj flaMªkse (Turner’s Syndrome) (b) Mkmu flaMªkse (Down’s Syndrome) (c) DykbuQsYVj flaMªkse (Klinefelter’s Syndrome) JCERT, Ranchi Session: 2024-25 Class-12 Subject- Biology Page 2  (d) dksbZ ugha (None) 7- dsaæd esa feyus okys vEyh; inkFkZ Mh,u, dh [kkst dh Fkh %& (DNA as an acidic substance present in nucleus was first identified by :-) (a) ÝsMfjp esLpj us (Friedrich Meischer) (b) e‚fjl fofYdUl us (Maurice Wilkins) (c) jkstfyaM ÝSadfyu (Rosalind Franklin) (d) o‚Vlu us (Watsan) 8- euq"; ds vxqf.kr Mh,u, esa gksrs gSa %& (Haploid content of human DNA is :-) (a) 3.3×109 {kkj ;qXe (3.3×109 bp) (b) 4.6×106 {kkj ;qXe (4.6×106 bp) (c) 5386 U;wfDyvksVkbM~l (5386 nucleotides) (d) dksbZ ugha (None) 9- Mh,u, esa mifLFkr 'kdZjk gS %& (Sugar present in DNA is :-) (a) jscksl (Ribose) (b) fMv‚fDlfjcksl (Deoxyribose) (c) nksuksa (Both) (d) dksbZ ugha (None) 10- fuEu esa ls lgh gS %& (Which of the following is correct :-) (a) ,Mfuu Fkkbfeu ds lkFk ;qXe cukrk gS (Adenine pairs with Thymine) (b) Xokfuu lkbVksflu ds lkFk ;qXe cukrk gS (Guanine pairs with cytosine) (c) nksuksa (Both) (d) dksbZ ugha (None) SECTION - B (2x2=4) vfr y?kq mÙkjh; iz'u (Very Short Answer Question) 11- mRifjorZu ¼E;wVs'ku½ dks ifjHkkf"kr djsaA (Define Mutation.) 12- ewy fl)kar ¼lsaVªy MksXek½ dks ifjHkkf"kr djsAa (Define Central dogma.) SECTION - C (2x3=6) y?kq mÙkjh; ç'u (Short Answer Question) 13- fuEu esa Hksn djsa %& (Differentiate between the following) (A) çHkkfork vkSj vçHkkfork (Dominance and recessive) (B) le;qXeth vkSj fo"ke;qXeth (Homozygous and Heterozygous) (C) ,dladj vkSj f}ladj (Monohybrid and Dihybrid) JCERT, Ranchi Session: 2024-25 Class-12 Subject- Biology Page 3  14- fuEu dks mnkgj.k lfgr le>k,¡ %& (Explain the following terms with example) (A) lg çHkkfork (Co-dominance) (B) viw.kZ çHkkfork (Incomplete dominance) SECTION - D (2x5=10) nh?kZ mÙkjh; ç'u (Long Answer Question) 15- ,d ladj Ø‚l dk ç;ksx djrs gq, çHkkfork fu;e dh O;k[;k djsAa (Explain the Law of Dominance using Monohybrid Cross.) 16- f}dqaMyh Mh,u, dh lajpuk dh çeq[k fo'ks"krk,a fy[ksAa (Give salient features of the Double-helix structure of DNA.) JCERT, Ranchi Session: 2024-25 Class-12 Subject- Biology Page 4