(B) .

Amniocentesis for sex dete rmin atio n is bann ed in

our coun try: Just ify
the ban ass1gn1ng a reas on. 1

(C) 'Pre y spec ies hav e evol ved vari ous defe nces to
avoi d pred atio n.'
Illus trate givi ng two exam ples in anim als. 2.

Or

· 'Pla nts hav e evol ved an asto nish ing vari ety
~ of defe nces aga inst
·, herb ivor es.' Illu stra te givi ng _two exam ples .

(D) ITJDs are an effective and popu lar meth od of cont race
ptio n amo ng Indi an
wom en. Ex:p lain the tyPe s of IUD s . and thei r -m ode
of acti on. 3

(E) Des crib e in_ deta il the . ·proc es~ of ozon e _-d ~ple
tion in the eart h's
stra tosp here and men tion its ~ons eque nces .
4

[H-704]
6
 (D) How are microbes useful in the secondary treatment of sewage ? 3

(E) Discuss the mechanism by which the AIDS virus causes deficiency of

the immune system of the infected person. Add a note on prevention

of AIDS. 4

Or

Discuss the life cycle of the malarial parasite plasmodium. Add a note

on prevention of malaria. 4

5. (A) Choose the correct alternative and ·rewrite :

In a bird watching trial to a coniferous forest, students observed, different

warblers on a single pine tree. The Cape May warbler was sighted at

the top of the tree, the bay-breasted warbler nested on the mid part

of the tree, whereas the Yellow-rumped warbler was seen moving from

one part of another. Such type of mechanism for co-existence among

closely related species is termed ............................... . 1

(i) Resource partitioning

(ii) Competitive exclusion

(iii) Interference competition

(iv) Competitive release

[H-704] 5 P.T.O.
 (B) Explai n the techni que by which billion copies of desired gene can be
synthe sised in vitro, in a short period. 2

(C) The produc tion of Transg enic animal s has many advant ages. Elucid ate
giving two examp les. 2

(D) Descri be the differe nt metho ds 1n biotechnology, used to introdu ce

alien DNA into host cells. 3

(E) Wri~e a brief accoun t of origin and evolution of man. · 3

4. (A) Choos e the correct alterna tive and rewrite :

Hercu les-th e 'Liger', is the world's biggest cat. It is an anima l produc ed

by ~ating a lion with a tigress in captivi ty. Such type of anima l breedi ng
is referre d to as ........ ....................... . 1

(i) Inbree ding

(ii) Ou t-cossi ng

{iii) Cross- breedi ng

(iv) In terspec ific hybrid

;
isation
.

(B) State any one warni ng sign of drug and alcoho l abuse among

youth. 1

(C) A rare variet y of 'Moira Banan a' plant at the Ela farm of ICAR, old .

Goa, is infecte d with a deadly virus. The Direct or of ICAR, wants· to

save the plant.

Sugge st with reason the metho d that can be used to sav,e the ·race
2
banan a plant.

[H-704] 4
 -5 . 4

(B) Stat e the function of the Z gene in the Lac Operon.

1
(C) Draw a neat diag ram of the DNA double helix.
2
(D) Give reas ons why the codon AUG is said to have dual
function in prote in
synt hesi s. Deri ve its com plim enta ry nitro geno us base
s on DNA and its
antic odon on t-RN A.
2
(E) A geologist on an expedition, visit ed the 'Bar ren Islan
ds' in the And ama n
sea, whic h has indi a's -only activ e valc ano. Ther e he
was surp rised to
find patc hes of lichens grow ing on the cooled lava. As a
stud ent of biology,
judg e the relev ance of liche ns and com men t on the
futu re cour se of
ecological succ essio n that may occur on this islan
d. 2
(F) Exp lain Dow n's synd rom e and Kine felte r's synd rom
e as chro mos oma l
diso rder s.
3

Or

Exp lain Sick le-ce ll anae mia as a Men delia n diso rder
. 3
3. (A) Cho ose the correct alter nati ve and rewr ite :
1
Toba cco crop in the God avar i .dist rict of And hra
' Prad esh, the majo r
. . .
'toba cco prod ucin g stat e in Indi a, show ed very low
yield s due to infes -
. tatio n of the root s by melo ideg yne inco gniti a. Whi
ch of the following
stra tegi es can be adop ted to prev ent the infe stati
on ?

(i) RNA splic ing

(ii) Tiss ue cult ure

(iii) RNA inte rfere nce

(iv) Che mica l safe ty testi ng

I-704] 3 P.T. 0.
 (B) In bir ds like Tur key , the fem ale gam
ete und erg oes dev elo pm ent
to for m new org ani sm wit hou t for
tili sat ion . Ide nti fy the abo ve
phe nom eno n.
1
(C) Ho w ma ny spe rms wil l be pro duc ed fro
~ 100 pri ma ry spe rma toc yte s
and how ma ny ova will be pro duc ed
from 100 pri ma ry OO cyt es ? 1
(D) Dra w a nea t dia gra m of the 'ma tur
e em bry o sac ' in flo we rin g
pla nts .

(E) Dis ting uis h bet we en ·foll icu lar pha se

_a nd Lutea l pha se of me nst rua l •
cycle.
2

Or

Dis tin gui sh bet we en Ser tol i . cel ls

. and Ley dig cel ls in hu ma n
test es.
2
(F) En list the fou r cau ses of bio div ersi ty
loss es. 2
(G) . Ske tch a nea t dia gra m sho win g the
stru ctu re of a spe rm. 2
I
2. (A) Cho ose the correct alte rna tive and rew
rite :
In hum an bei ngs , bro wn eye colour is
dom ina nt ove r blu e eye col our .
A bro wn eye d boy has a blu e eye d mo the
r. Wh at cou ld be the pos sib le
gen oty pes of the fath er- ?
1
(i) BB or bb

(ii) bb onl y

(iii) BB onl y
•
(iv) BB or Bb
[H-704]
2
(

20 16 III 10
10 00 Se at No. l
BI OL OG Y
Ti me : 2½ Ho ur s
Su bje ct Co de

(P rin ted Pa ge s : 6) M ax im um M ar ks : 55
To tal No . of Qu es tio ns : 5

IN ST RU CT IO NS : (i) Al l qu est ion s are com pu lso ry.

on a fre sh pa ge .
(ii) An sw er eac h ma in qu est ion
• (iii ) W rit e the nu mb er of the
ma in q ue sti on an d

sub -qu est ion cle arl y.

r spe cif ied in lea d
(iv ) Dr aw ne at dia gra m wh ere ve
pe nc il only.
we ve r int ern al choice
(v) Th ere is no ov era ll cho ice ho
ea ch of 4 marks,,
has be en pro vid ed in on e qu est ion
- 3 ma rks an d in tw o qu est
ion s of 2 ma rks .

ly on ~ on the an sw er
(vi ) MC Qs sho uld be att em pte d on
-
re tha n once, it will no t be evalu
book. if- att em pt mo
ate d.

an d rew rit e :
1. (A) Choose the correct alt ern ati ve
em :e
, the ch rom oso ma l p.u rnb er in its me ioc yte s is 20 . H
In Ma ize
er of ch rom os om es 1n its en do sp erm an d egg cel ls wi ll
the nu mb
1
be ................ ............... .
(i) 20 an d 10 respectively

(ii) 30 an d 10 respectively

(iii ) 40. an d 20 respectively

(iv ) 60 an d 20 respectively
P.T.O.
1
(H-704J
 1
55
15. Analys e the ·role of plants and decomposers in the carbon and phosphorous
biogeochemical cycles. -
Or

How ~s Hydra rch succession differe nt from Xerarc h · succession with respect
to habita t ~nd pionee r species ?
Sectio n (C)

16. Draw a neat scientifically correct diagra m of the sectional view of the female
reprod uctive system .

t 17. Identi fy and explai n_any three metho ds of contra ceptio n that involve the use
'c,f hormo nes.

18. The divers ity of living organi sms is so vast that. it c~ be studie d at different
level~. Subst antiat e with examp les.
or ·
Some times threat ened specie s canno t be · saved· with in situ conser vation
alone. How then can such · specie s be preven ted from being extin~ t ?

H-4704(STJ 3
/
\
 4. Par tur itio n tak es place und er the inf
luence of hormones. Justify.
5. What is the role of 'i' gene and its pro
duct in the lac operon ?
6. Name the pur ine s in DNA molecule.
7. Scientists hav e det erm ine d tha t the
loss of tropical but ter fly species from
Singapore is due to the loss of the ir
specific larval hos t pla nts . Ide nti fy the
phenomenon.
8. · Describe hum us.

9. Given below is a sequence of ste ps

involved in the organisation of hu ma
DNA. Ide nti fy (a) and (b) . n
. '3

HUMAN DNA
(Approx. 2~p )
+(;;:\ . Ii:\ condensation
~ . . . NUCLEOSOME •. •M••n•.,- \g
! NHC CHROMOSOME
repeated Proteins ..__ _ _ __
units of
nucleosome

Se cti on (B)
10. Sta te 4 sal ien t fea tur es of the genetic
code.
11.
12.
Describe the, str uct ure of the biogas
Da ma ge to the pit uit ary .gla nd cau
me nst rua l cycle of Miss An a· advers
i;>lant.
sed by an acc ide nt has aff ect ed the
ely. Ex pla in how is thi s possible ?
•
13. Pu nja b has the hig hes t , num ber of can
cer cases in Ind ia, att rib ute d to the
ram pan t use of chemical pesticides.
These far me rs can not afford gen etic ally
modified crops. As a biology stu den t
find solutions tha t can replace chemic
al
pesticides.
14. 'Pr im ary ovarian insufficiency' is a con
dition iir which the individual's ovaries
become non-functional. . Su gge st and
exp lai n any · 2 ass iste d rep rod uct ive
technology me tho ds tha t can ena ble
suc h ind ivi dua ls to conceive.
H-4704[ST]
2
 ---- ----
2023 III 27 0930 Seat No. \ \ \ \ \ \
Time : 1½a-Hours SECON D TERM BIOLO GY

Subjec t Code

Total No. of Questi ons: 18 (Printe d Pages: S) Maxim um Marks : SO

INSTR UCTIO NS: (i) . All questions are compulsory.

(ii) Draw diagrams in lead pencil only.

(iii) The question paper consists of three section A~ Band C.

• · Section (A) has 9 questions of one mark each. ·

• . Section (B) has 6 questions _of two marks each.

• · . Section (C) has S questions of three marks each.

(iv) . 'The to~al number of questions are 18;

'
-
· (v) _ There is no overall choice, however an interna l choice is
provided in one· question of section B and one question of

section C. ·

Sectio n (A)
•

1. What is transcr iption -?

2. In human s, which chromosome has the most number of genes and which one
. . . .

has the fewest ?

' .
3. While studyin g a mangro ve ecosystem, will Net Primar y· Productivity or

Gross Primar y Produc tivity be lower ? Justify your answer ...

H-4704tSTl 1 P.T.0.
 .,
red from. high fever. She comp lained of havin g heada che, stolllllJ...
()nstipation,, Her Wida l test repor t was positi ve.

tify the disease ahe is suffe ring from.

! the fJcientific name of the ,c ausal organ1Sm.

• I-

ith exam ples bow microbes can enric h the nutri ent quali ty of the

the steps invol ved in the prima ry treat ment of sewag e.

epido ptera ns die when they feed on Bt cotton plant ? Expla in in

Or

the American comp any, Eli Lily produce huma n insul in ?

~

1
Alien species invas ion as a cause of loss of biodi versit y.

SECT ION - 'C' {3 _m arks each )

the Hersh ey-Ch ase exper iment to prove that DNA is the genet ic
L

Or

1the Messelson and Stahl's exper iment to prove ~he semic onser vative
eplication.

a neat diagram of DNA doubl e helix.

 - -- ,ir-

; olypeptide consists of 12 different amino acids. How many tRNAs are

needed for the synthesis of this polypeptide ?

6_ A double stranded DNA has a total of 2000 nucleotides, out of which

520
are cytosine containing nucleotides. How ma~y purine bases does this DNA
possess ?

7. Name the levels of biodiversity represented in the following examples

(i) More than 50,000 genetically different strains of rice in I~dia.

(ii) Wetlands and Estuaries in India.

8. On a study tour, botany ·students visited a Seed Bank. They were fascinated

by the huge collection of seeds of different crops and wild. plants stored in

neatly labelled jars. vVhich approach of conservation is used in this case ?

9. A liver tran~:elant patient had to be· administered _medicines to suppress his

immune system. Identify .the medicin~ whlch can be used.

SECTION - 'B' . (2 marks each)

10. From the table given below, fill in the blocks labelled as A, B, C and· D.

Type of barrier Example · Function

' I

[If Skin Prevents the entry of

: microorganism s in the body. .

Physiological [~J @]
[Q] Macrophages Phagocytose · and de~troy

microbes

H-4704 [ST] 2
 2022 IV 8 1100 Seat No. I -I
Time : 1½ Hours SECOND~TERM BIOLOGY
Subject Code

Total No. of Question s : 18 (Printed Pages : 3) Maximu m Marks : 30

INSTRU CTIONS : (i) All questions are compulsory.

(ii) Draw diagrams in lead pencil only.

(iii) The question paper consists or"three sections A, B and C.

• Section A has 9 questions ·of 1 mark each.

• Section B ·has 6 questions of 2 marks each.

• Section C has 3 questions of 3 marks each.

(iv) The total number of questions are 18.

(u) The~e is no overall choice, however an internal choice

is provided in one question of section B and one question
of section C.

SECTIO N - 'A' (1 mark .each)

1. What is allergy ?
. -
2. Give any two advantag es of genetical ly modified plants.

3. How was the milk produced by transg~nj c cow 'Rosie' .different from the
natural cow-milk ?

4. A child was diagnosed with Fabry disease, a rare inherited disorder caused
by mutation s in the GLA gene. · As a result, his body was unable to produce
an enzyme which was needed for the breakdow n of certain fatty molecules.
'Spggest a· technique which can be used to treat this disorder.

H-4704 [ST] 1 P.T.O.

 (C) Mr. Vedant fa a farmer from Pemem, interest~d to start _qairy .farm scientifically, As ~
student of science which processes and symptoms yo,u will suggest to increase yi~ld and
improve milk quality, in his dairy farm?· [2]

(D) Discuss the various .methods involved in the detection of cancer. [2]
OR
How HIV transmission takes place in human? (2]
(E). Explain the different types of barriers of innate immunity. (2]
(f:) Which are the microbes and what role do they play in house hold products?~· [3]

Q. 5 (A) Choose the correct alternative and rewrite: [1] ; )

. h
The process of re.storing a forest that once existed but was destroyed _at some point of'(t
time in the past is -

• Cultivation

• Destruction

• Deforestation
.
• Reforestation
(B) State the way by which_the amount of organic matter in sewage is estimated. [1]
(C) ·:,,Discuss the· different ways by which euotrophication brings about natural ageing of a
lake. [2]
OR
How noise pollution affects human health? Suggest the measures to prevent its impact ~
on human health. [2]

(D) What is commensalism? Illustrate with suitable examples.(any two) [3]

(E) Explain the natural and barrier methods help in control of human population. [4]

H-704 [BJ [N-09] - 1600 Page 4 of 4

•
 Q. 3 (A) Choose cotrect alternative and rewrite:
'ELISA ' test is based on the principle of- [1]

• Manipulation of DNA.

• .
.. ogy .
r-DNA technol

• Antigen-antibody reaction .

• RNA intetference

(B) What is saltation? [1]

I

[2]
(C) Give the main advantages of genetically modified plants (GM plants) . .

[21
(D) Describe different steps involve9 in the isolation of DNA in a pure form:

s of a
(E) Dr.Ram esh is an anthropologist, During excavation in Java, he found fossil remain
ect - [2]
carnivorous animal with brain capacity 900 cc. With your knowledge of thesubj
(i) Name the fo~ of animal discovered by Dr.Ramesh.
(ii) How long ago this animal existed?

ome. [3]
(F) What is a palindrome in .ONA?· Give the role of restriction enzymes in a palindr

Q.4 (A) Choose the correct alternative and rewrite.

dry scaly
Rama compla ined intense itching of hands and feet: Examination showed
[1]
lesions on the skin and nails, which is symptom of-
• Filariasis

• Amoeb iasis

• Ascaria sis

• Ringworm
[1]
(B) How is controlled breeding experim ent carried out in animals?

Page 3 of 4
H-704 [B] [N-09] - 1600

•
 I (D) a
Mr. Jaclc; df~t or of Golden Island 'ordered cuttin
two decades he_found vast changes and loss in biolog
g of the forest for gold mining. After
ical diversity. As a student of
•
[2]
ecology suggest any four causes for such losses .
[2]
(E) Draw a neat diagram of structure of spenn.
[3]
(F) What is Ooge nesis ? Describe the process in <:ietaiJ.

OR

detail. (3)
What is spe~ atoge nesis ? Desc ribe the process in

Q. 2 (A)
,· Choo se the coire-ct altern ative and rewrite:
mer is referr ed to as -
The rate-o f form ation _o f new·organ ic matte r by consu
• Gross pnm ary,productivity.
• Net prim ary productivity.
• . Seco ndary productivity.
• · Prod uctiv ity ·'

He observed certain species of

(B) Mr. Salim is a saiJot: -~ho visited the island of volcanoes.
lichens on· the coole d lava.' Which terminology will
you suggest to the grow th of such
. [1]
livin g orga nism ?

. [2]
(C) · Draw a neat diagram of double helix of DNA
in eukaryotes. [3]
(D) What is transcription? Describe the process of transcription

determination in human. Mention the features seen in 21 st trisomy

(E) Discuss in detail sex
[4]
and XXY genetic abnonnaJity.

OR

w colour seed is dominant

State the law of independent assortment. In a pea plant yello
e. With the help of Punnet
over green, and round shape is dominant over wrinkled shap
[4]
square state dihybrid cross and phenotypic ratio.

704 [BJ [N-091 - 1600 Page 2of 4

 2015 Ill09 10:00 Seat No.
•
t Time: 2 ½ Hours
Subject Code
BIOLOGY

I" I1 IO I 4 I
Total No. Of Questions: 05 · (Printed Pages: 04) Maximum Marks: 55

INSTRUCT IONS:

(i) All questions are compulsory.

(ii) Answer each main question on a fresh page.

Q (iii) Write the main question no & sub-question no clearly

·~ (iv) Draw a neat diagram wherever specified in lead pencil only.
,
(v) The question paper consists of~ main ·questions.
' (vi) There is no overall choice, however in~rnal choice has been
provided in one question each of ~ marks, J. marks and two
questions of I marks.
(vii) 1'411ftiple choice questions shoula be attempted only once on the
answ_er book. If attempted more than oace, it wlll not be evaluated.

Q. I (A) Choose the correct alternative and rewrite:

Pollen grains are weJI preserved as the fossils because of the presence of _ _ __ [1]

• Sporopollenin
~· .
.--.
• Germ pore
,,1·
\·
• Exine

• Intine
(B) Dr.Minaxi is the head of zoology department, in Lucknow University. In her laboratory
she developed number of frogs for research work, from single parent, which are
morphologicalJy and genetically similar. What method do you think Dr. Minaxi adopted
[1]
for the above process?

(C) Draw a neat diagram showing L.S of flower.

[2]

H-704 [B] [N-09J - 1600 Page 1 pf 4