BIOLOGY PAPER 1
(THEORY)
Maximum Marks: 70
Time Allowed: Three hours
Candidates allowed additional 15
are
minutes for only reading the paper.
They must NOT start writing during this time.
- *******
This paper is divided
into four sections-A, B, C and D.
Answer all questions.
SectionA consists
of one question having sub-parts of one mark/ two marks each.
Section-B consists of seven questions of
Section-C consists
two marks each.
of seven questions of three marks each, and
Section-D consists
of three questions of five marks each.
Internal choices have been provided in one question each in Section B,
Section C and Section D.
The intended marks for questions or parts of questions are
given in brackets []."
**********
SECTIONA-20 MARKS
Question 1
Answer the following questions brienly.
Name the source of thermostable DNA polymerase. her mus usth wp.
Mention the scientific name
of protozoan parasite that causes Amoebiasis.
W h a t is cryopreservation? Entamoeby histoLyhta
The maternal grandfather of a
is normal. The father
boy is colourblind, but his maternal grandmother 1
of the boy is also nomal. What is the
probability of this
boy being colourblind? 507
Name the type of antibody that can be transferred through the placenta. g
This Paper consists of 9 printed pages and1 blank page.
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l
( During which phase of the cell cycle, does DNA replication take place? phaBe,
) How many
sets of primers are required in each cycle of PCR? ses
(VhU Detine perisperm.
Which one of the following enzymes is used to join DNA fragmenis?
(a) DNA polymerase
Ligase
C) Primase
(0)Endonuclease
What type of ecological pyramid would be obtained from the following data?
Secondary consumer: 120 gm
Primary consumer: o0 gm
Primary producer: 10 gm
*
Inveried pyamid of biómass i
(0) Pyramid
of energ
(C) Upright pyramid of numbers
(0) Uprnght pyramid of biomass
Assertion: A person who has received a cut from a sharp object and is bleeding
needs to be given an anti-tctanus injection.
Reason: Anli-tetanus injection stimulates the production of antibodies for
and Reason is the corTect
) Both Asertion and Reason are true,
explanation of Assertion
not the corect
true, but Reason is
(6) Both Assertion and
Rcason are
Cxplanation of Assertion.
Reason is false.
ASsertion is true, but
(d) Both Assertion and Reason are false.
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(aWhichone of theot following
achve Bt 10Xin
factors is responsible for activation of protoxin into
Bacifus thuringiensis?
11
Body temperature
(6) Moist surface of midgut
Alkaline pH of gut
a) Acidic pH of stomach
Give one significant contribution of ecach of the following scientists
(hn
)TR.Malthus e Homan pepulahon hrosth
(6) R. Mishra Fttur r Sndidn
tdog
Give a term for the following:
(a)An ART in which eggs are removed from the ovary of the female,
tertilised and then placcd in
her tallop1an tub 9IF
Fusion
(6) of male gamete and secondary nucleus in angiospems. lriple tusion
Expand the following abbreviations: 2
)NACO Nah onil ALDS Contol organusath m
() PID Pelvic klanmatery Dis east)
) Give a reason for each of the following:
(Catileavoid browsing on Calotropís plant.
(6) DNA cannot enter directly. into the host
cel
3 (attle void larosi dn
Celotropis plahts becavse
it
ro d u e poisbneap tarda 8uce
b- DNA Cannot pas th în to ha cel hreh alla
emorane thu DNA molecwle is polar and plasma
memrane is oon polr mnahvre
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SECTIONB-14 MARKS
Question 2
Give one difference between the tollowing pairs
5pleen hymuo.
() Sites of maturation of -Lymphocyles and T-Lymphocytes
() Sources of Opioids and Cannabinoids
oPioie opium popPy plan
anna binoido - Cnnabis ahva plants
Question 3 1
Bricly discuss amy two methods by, which plants avoid self-pollination.
FlOers ar unisexua t yeid selPolloshonCUnisexwslu tyy)
AnthorS ant shama miture t d a r int tmeCPithogamy)
Questioa 4
Mention the location and the function of Leydig cells.
fovndJjdtent T h L S emioi o b b l e 1 t h teohde
The grodute otus tar one in n renen L
Question 5 12
of vestigial organ in human
vesiigial organs Give any one
example a
What are
body. The o CC
OR
(1) State Hardy Weinberg's principle Give a mathematical expression tor this
l Ceman estun
T neicvarih bm in pepulahon
a
principle
tro encrat en to te net in t i ooeneeus Tor bin
Ruestion 6 12
Riya went to the
hospital to
meet her
sister who was undergoing some trealment. The
from various of
types aliergiCs, pneumonia
was
hospital crowded with patients sulfering
and Ascariasis. Pnewmmid.
Name the disease that Riya is most nkely to get intected wilh. Give one TeusO oTu
oillL
answer.
drpceleaso b nted person, Riya
fnwnonud is a drplt nKoh on
Ruestion 7 12
1or
State the steps involved in the
process of gene therupy thereatment o
ADA-0CIency. 9se lati dn ypkoy teo rom HDA dehuent Ptient
njt ch n ppkoytes by Genethdl ginerd
1223-863A
wre tes-
Geneta mpheyt o are
injet eent.
uestion 8
The pedigree chart 8iven below represents the pattem of inhenitance of sickle
ce
anacmia in a family. Sudy it Carcruny ana arnswer the questions tha tonow.
W h a t is the genotype of the father? XY
( What is the phenorype of the mother? ommo39 eceasve,
SECTIONC-21 MARKS
Question y
Discuss any three major causes oflos of biodiversity
Habitaf detrpcN Om EtTagmentahion.
. nu e i n vD en
nangen en
a s imprptr
e nanen
Tr o rre
on.°p
eston 1
uestion
B
NName and describe the techinique that helps in the separation and isolation of
DNA tragments.
Reconbinant DNAtechnoay:
R
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i) Study the diagram given below und answer the questions that tollow.
Clal Hindlll
EcoR
Pvul
Pstl
BomH
amp" tet"
Sall
roP
Pvull
@) Name the clonng vctor shown above. In which organism is this cloning
VEctOF Insertedpb5a fotroduc imo t.
) Mention ary two restriction sites sbown in the diagram. Hinal ! , 6amHI.
C)Name any nwo selectable markers shown in the diagram. Ampiain &teraydune
Question l1
Draw a neat and well labelled diagram of LSof an anatropous ovule,
Labelled Chalaga, outur intaumen , n tgunun irp
n, aa nuleu6, poar nuc le
Question 12
E x p l a i n the process of sex - determination in grasshopper. XX- XO
( What is the genotype of Turner's Syndrome? Mention, ay.one symptom ot this
syndrome. dnHb 4xD
Ashrt oeck t esbedl aPpearance
Question 15
With the help of neatly Iabelled diagrams, explain the different types of age Pyramids of
humanpopulanion. Triang lar, Bell- shapel Urn- shapd
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uestlon
The
scientists rom a rescarch institute collected samples of water from ot
sewage pipeswas
BOD of
nd to e 0
tound lo be mg
L Ihe nalysis, the
BOD valuc
of the sample
value the sample 200
from city B was
frommgcity A
() Which one ot the iwo cilies needs a sewage treatment plant?
(i) Bricfly discuss the steps involved in the treatment ofsewage.
(ii) What will be the effect of sewage treatment on the value of BOD?
Question 1
The diagram given below sbows the life cycle of a malarial parasite. Study it carefully
and answer the questions that follow
() Name the hosts in
which thc asexua nhele m/uito
take place. Asexual Man Serual tnle Anopheles /oto
(i) Identify the infective stage labelcd
'D'spoT 03teb Flasgd um
(Gii)
Name the stinictures labelled A*and °E Aivar, Emerogoite
(v Give any one symptom of malaria. NaLea.
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SECTIOND-15 MARKS
Question 16
or genes in the Luc operon sysiem in E. coli.
EXplain he componenls the structural
How does the operon function in the presence ot lactose:
Regr ene Gene, opratr n , rometor qane
Lat 2-P-zalac tosidae; Lat y -la per maan e; lac transatey a
uestion 17 IS
) Given below is the diagram depicting the menstrual cycle in human beings. Study
it carcfully and answer the questions that loilow,
Menae
25 27
and"D?
C-Ovulatoy he
Which phases are indicated by 'C D-ktea! hase
(6) Name the structure labeiled 'F"7 What is its role? T wtam r
progtoteron
()Eplahe changen theevel ot prosestrron EP th
(d) Which hormoné present in the urine confirtns pregnancy in human otstrovtt innfe
beingsrman choeriomic gomade tTopio CHC6).
()Identify the structure labelled E'. Name the hormane released by it.
E Matr OR
hoT mbne rdeased- stragen.
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( According to a survey conducted by the Govemment of India in the year I950,
thie survey conductea in
ine
the
populalion ot
the
country was 550 million. In the
had reached above 1000
next
year 2010, population million.
List ay DwO Teasons
for this rise in the
population. S a
be taken by the Governinent to control
Suggest amy
hwo
steps which should
affect the growth of a country7
(How does the population explosion
What is the diffcrence between the natural and arificial contraceptive
Unempleyusent-
methods? Give one example ot cach nenoo.
Questton 18
the involved
Descnbe the mechanism of decomposition by explaining various processes
traunthon.
Natural Methad Arhtual metuod Leachir
ebe mefd or k Te meted urk
ubolism
m hrinu Runtufi on.
rinuP Miner düzah on.
aydi dkanub ovon u heials
n e r mechir CantTacepve deie ar
nchanal ndiesa to
Esarm ple : m
averd chan
rd sperm mh
n
xample: Conder
entractphve p
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