Uttarakhand Board Class 12 Sample Paper 2023 Biology

Ikzfrn”kZ iz”ui=
2023
tho foKku lS}kfUrd
d{kk 12
le;% 3 ?k.Vs ] [iw.kkZad% 70
Time:3 Hours] [Max Marks:70

funsZ”k& (i)- bl iz”u i= esa dqy 28 iz”u gSaA lHkh iz”u vfuok;Z gSaA
(ii)-iz”u 1 ds 8 Hkkx gSaA ;s lHkh cgqfodYih; gSaA izR;sd 1vad dk gSA
(iii)iz”u la[;k 2 ls 7 rd fuf”pr mRrjh; iz”u gSaA izR;sd iz”u 1 vad dk gSA
(iv)-iz”u 8 ls 17 rd vfr y?kq mRrjh; iz”u gSaA izR;sd Ikz”u 2 vad dk gSA
(v)iz”u 18 ls 25 rd y?kq mRrjh; iz”u gSaA izR;sd iz”u 3 vad dk gSA
(vi)iz”u la[;k 26 ls 28 rd nh?kZ mRrjh; iz”u gSaA izR;sd iz”u 4 vad dk gSA
(vii)vko”;drkuqlkj LoPN ukekafdr fp= cukb;sA
Instructions: (i) There are in all 28 questions in this question paper. All
questions are compulsory.
(ii) There are 8 parts in Question No 1. Each part is a Multiple Choice Question.
Here four options are given in each question. Write the correct option in your
answer book. The question asked in each section carries one mark
(iii) Question No 2 to 7 carry one mark each. Question No 8 to 17 carry two marks
each. Question No 18 to 25 carry three marks each and Question No 26 to 28
carry four marks each.
(iv) There is no overall choice in Question paper, however an internal choice has
been provided in two questions of 2 marks, three questions of 3 marks and all
questions of 4 marks each. You have to attempt only one of the given choices in
such questions.
v) Draw neat labeled diagrams as needed.

1-(i)& ljVksyh dksf”kdk;sa ikbZ tkrh gSa& 1
Sertoli cells are found
¼a½v.Mk”k; esa ¼ b½;d`r esa ¼ c ½o`’k.k esa ¼ d½vX;k”k; esa
(a) Ovary (b) Liver (c) Testis (d) Pancreas
(ii)& ,d ladj ladj.k esa thuh izk:i ¼thuksVkbi½ vuqikr gS&
1 The genotypic ratio in a monohybrid cross is-
¼ a½ 3%1 ¼ b½ 9%3%3%1 ¼ c½ 1%2%1 ¼ d½ 2%1%1

(iii)& Mh,u, dh fip esa fdrus {kkjd gksrs gSa\ 1
How many bases are there in the pitch of DNA?

¼a½ 15 ¼ b½ 14 ¼c½ 5 ¼a½ 10

(iv)& izfrTkSfod dk fuekZ.k gksrk gS& 1
Antibiotics are manufactured in-
¼a½ foVkfeu }kjk ¼ b½ jlk;u }kjk
by vitamins by chemicals
¼c½ ;wfj;k }kjk ¼d½ lw{ethoksa }kjk
by urea by micro-organisms
(v)& tSfod dSaph tks Mh,u, [k.M dks dkVus ds fy;s iz;qDr gksrh gS] og gS& 1
The biological scissor which is used to cut the DNA segment is-
(a) izksVhu (b) jsfLVªD”ku ,.MksU;wfDy,t
Protein Restriction endonuclease
(c) iksyhfejst (d) thu iwy
Polymerase Gene pool

(vi)& fuEu es ls dkSu McyjksVh cukus esa iz;qDr gksrk gS& 1
Which of the following is used in making bread-
¼ a½ ;hLV ¼ b ½ “kSoky
Yeast Algae
¼ c½ jkbtksfc;e ¼ d½ ySDVksoSlhyl
Rhizobium Lactobacillus

(vii)&[kk| J`[kyk esa lokZf/kd la[;k gksrh gS& 1
The largest number in the food chain is-
¼a½ izFke Js.kh ds miHkksDrk ¼b½ vi?kVd
First class consumers Decomposers
¼c½mRiknd ¼d½f}rh; Js.kh ds miHkksDrk
Producers Second class consumers
(viii)&fuEu esa ls xzhu gkml xSl gS& 1
Which of the following is a green house gas?
¼ a ½ vkDlhtu ¼ b½ ukbVªkstu
Oxygen Nitrogen

¼c½ dkoZu MkbZvkDlkbM ¼d½ vkXkZu
Carbon dioxide Argon
2- ekuo “kqdzk.kq esa fdrus xq.klw= gksrs gSa\ 1
How many chromosomes are there in human sperm?
3- ,yhy D;k gS\ 1
What is Allele?
4- vkj,u, esa ik;s tkus okys ukbVªkstuh lek{kkjksa ds uke fyf[k,A 1
Write the names of nitrogenous bases found in RNA.
5- nw/k ls ngh cukus okys lw{etho dk uke crkb;s \ 1
Name the microorganism that makes curd from milk?
6- Hkkjr ds nks jk’Vªh; m|kuksa ds uke crkb;s A 1
Name two national parks of India.
7- +ck;ksikbjslh D;k gS \ 1
What is Biopiracy?
8- ekuo v.Mk.kq dk ukeakfdr fp= cukb;sA 2
Draw a labeled diagram of human ovum.

,d vko`rchth ikS/ks dh o/khZ dksf”kdk esa 16 xq.klw= gSaA rks mlds ijkxd.k] Hkwz.kiks’k] iRrh
o tM+ esa xq.klw=ksa dh la[;k crkb;sA

In a vegetative cell of an angiospermic plant the number of
chromosomes are 16. Then tell the number of chromosomes in its
pollen grain, endosperm, leaf and root.

9- ch Mh,u, o tsM Mh,u, esa vUrj crkb;sA 2
Differentiate between B DNA and Z DNA.
10- VsLV dzkl fdls dgrs gSa le>kb;sA 2
What is test cross, explain.

,d L=h dk jDr lewg O gSA mldk fookg jDr lewg AB okys iq:’k ls gksrk gSA rks
Hkkoh lUrkuksa esa dkSu&dkSu ls jDr lewg gks ldrs gSSaA js[kkfp= }kjk le>kb;sA

The blood group of a woman is O. She is married to a man of blood
group AB. So which blood groups can be there in the future children.
Explain with the help of diagram.

11-lw{etho vk/kkfjr pkj m|kxksa ds uke fyf[k,A 2
Write the names of four micro-organism based industries.
12--,dy dksf”kdk izksVªhu ls D;k le>rs gSa \ 2
What do you understand by single cell protein?
13-ikni Ård lac/kZu ls D;k le>rs gSa \ 2
What do you understand by plant tissue culture?
14-,d ikfjrU= esa ÅtkZ izokg dks js[kkfp= }kjk le>kb;sA 2
Explain the flow of energy in an ecosystem with the help of diagram.
15-vEy o’kkZ ls D;k le>rs gSa\ 2
What do you understand by acid rain?

16-izFke iks’kh Lrj ls D;k le>rs gSa\ 2
What do you understand by first trophic level?

17-ty iznw’k.k dks fu;af=r djus ds dksbZ nks mik;ksa ij izdk”k Mkfy;sA 2
Mention any two ways to control water pollution.
18-vko`rchth ikS/ks ds chtk.M dk ukekafdr fp= cukb;sA 3
Draw a labeled diagram of ovule of angiospermic plant.
19-,d gheksfQfyd iq:’k dh “kknh gheksQhfy;k jksx dh okgd L=h ls dh tkrh gSA rks
Hkkoh lUrkuksa esa ;g jksx fdl izdkj mRiUu gksxkA js[kkfp= }kjk le>kb;sA 3
A hemophilic man is married to a woman who is a carrier of hemophilia
disease. So how will this disease arise in the future children. Explain
with the help of diagram.

20-viw.kZ izHkkfork dh [kkst fdlus dh \ viw.kZ izHkkfork dks dsoy js[kkfp= }kjk
le>kb;sA 3
Who discovered incomplete dominance? Explain incomplete
dominance with the help of diagram only.
,d ladj ladj.k dks mnkgj.k lfgr le>kb;sA
Explain monohybrid cross with example.

21-ekuo dY;k.k esa i”kqikyu dh D;k Hkwfedk gSA 3
What is the role of animal husbandry in human welfare.
22-ikWih] dksdk vkSj HkkWx ls dkSu ls Mªx izkIr fd;s tkrs gSa \ 3
Which drugs are obtained from poppy, coca and cannabis?

23-vkuqoaf”kd :ikUrfjr Qlyksa ds mRiknu dh ykHk o gkfu fyf[k,A 3
Write the advantages and disadvantages of production of genetically
modified crops.
24-iq:’k esa ikbZ tkus okyh nks lgk;d tuu xzfUFk;ksa ds uke o dk;Z crkb;sA 3
Name and function of two accessory reproductive glands found in male.
25-fuEu ij fVIi.kh fyf[k,& 3
Write a note on the following-

¼d½ lgksidkfjrk ¼[k½ ijthfork
Cooperation Parasitism

izd`fr esa dkoZu pdz dk o.kZu dhft,A
Describe the carbon cycle in nature.

26-vko`rchth ikS/kksa esa y?kqchtk.kqtuu dk lfp= o.kZu dhft,A 4
Give a pictorial description of microsporogenesis in angiosperms.

ekuo eknk v.Mk”k; dh lajpuk dk lfp= o.kZu dhft,A
Give a diagrammatic description of the structure of human female
ovary.

27-tSo fodkl D;k gS \ tSo fodkl ds rhu izek.kksa dks Li’V dhft,A 4
What is biological evolution? Elucidate three evidences of biological
evolution.

g’kZs ,oa pst ds iz;ksx dk o.kZu dhft, ftlesa mUgksua s fl} fd;k Fkk fd Mh,u, gh
vkuqoaf”kd inkFkZ gSA
Describe the experiment of Hershey and Chase in which they proved
that DNA is the genetic material.

28-[kk| mRiknu c<+kus esa eRL;dh o e/kqeD[kh ikyu dh Hkwfedk dh foospuk dhft,A
4
Discuss the role of fisheries and beekeeping in increasing food
production.

fuEu ij fVIi.kh fyf[k,&
¼d½ dSalj ¼[k½ ,Ydksgy ds nq’izHkko 2$2
Write a note on the following-
(a) cancer (b) side effects of alcohol