SeriesAABB4/3 SET-1
R-
Q.P. Code
57/3/1
Roll No.
Candidates must write the QP. Code
on the title page of the answer-book.
Please check that this question paper contains 12 printed pages.
Q.P. Code given on the right hand side of the question paper should be written
on the title page of the answer-book by the candidate.
Please check that this question paper contains 13 questions.
Please write down the Serial Number of the question in the answer-
book before attempting it.
15 minute time has been allotted to read this question paper. The question
paper will be distributed at 10.15 a.m. From 10.15 a.m. to 10.30 a.m., the
candidates will read the question paper only and will not write any answer
on the answer-book during this period.
BIOLOGY (Theory)
AfRa HHA: 2 3fea 3: 35
Time allowed: 2 hours Maximum Marks: 35
57/3/1 281A P.T.O.
General Instructions:
(i) Thisquestion paper contains 13 questions. All questions are
compulsory.
(ii) The question paper has three
sections Section A, B and C. -
(ii) Section-A has 6 questions of 2 marks each. Section-B has 6 questions
of 3 marks each, and Section-C has based
a case question of 5 marks.
(iv) There is overall choice. However, internal choices have been
no
provided
in some questions. A student has to
attempt only one of the alternatives
in such questions.
(v) Wherever necessary, neat and
properly labelled diagrams should be
drawn.
SECTION - A
1. A boy developed some allergic reactions when he straight entered into his air
conditioned room after a game of football outside his house. Write two any
symptoms that could be noticed in such condition. How does our body combat
such conditions ?
2
2.
2. (a) () Write the Scientific name of the plant from where natural
cannabinoids are obtained.
(i) Mention the parts of the plant that are used for extracting the
drug.
(ii) How does the drug affect human body ? 2
OR
b) Epithelial lining ofintestine is considered
our as
secondary lymphoid
organ. Justify the statement.
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P.T.O
3. Farmers a-
3. so as to im
(i) Rhizobi
Explain.
(i) aata 2
4. Organicf
agents. Exg
2
5. Mammals
animals ca
2
6. (a)
6. () 3HTSTTEA
(B
Observe t
3IT4
questions
i) Ident
A'aT B'I TEIA I
(i) i) Caleu
bacter
2
372rT b) Post
()
Repro-
Pre R-
Identify th
,i,,
basis of wh
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4
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3. Farmers are often suggested to use the following organisms in their crop land
so as to soil
improve the fertility.
i) Rhizobium (i) Anabaena
Explain. 2
4. Organic farmer use Trichoderma and Baculovirus as biological control
agents. Explain. 2
2
5 Mammals are capable of maintaining homeostasis. But, very few smaller
animals can survive in reasons.
polar regions. Give 2
2
6. (a) Immigration
Population D
Emigration
answer the
Observe the schematic representation given above and
following
questions
(i) Identify A and B.
(i) Calculate the growth rate of bacteria in a curd sample, where 1 million
bacteria increased to two million, within a period of one hour. 2
2
OR
b)
Post Reproductive
Reproductive
Pre Reproductive
,,",, ,, ,i,i,ii,i,i,i,i
Identify the type of pyramid given above. Write the identifying feature on the
basis of which you identified it.
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7. (a) Write the
7 principle i
(b) Name the
3
8. A patient comp
8. blood clots and
after stool test.
(a) Write the
() (b) How do yo
(c) Write your
3
9. What are cry-p
9. acts as a biologi
3
10. (a) Write the
10. extensive
(b) Study the
S CA
Scale
log
log S = log C +2 log A
-
l o g
As per Ale=
T7 C
the graph
feu T a S, A, Z I aTd ? 3
11. (a) Explain th
11. (5) 3IEUt 61 HET4A HEIaTHAT 51 ¥6TTAI 61 TAT |
3
(b) "Forestsp
differenta
6 57/3/1
5 7/3/1
N
20
eos 3o-
30T
Ssauqo.u saLads
E E
12 (a) Given below is the stepwise schematic representation of the process O
electrophoresis. Identify the 'alphabets' representing () Anode end
i) smallest/lightest DNA strand in the matrix (ii) Agarose gel 3
(R)
end
T IIIend
b) What is elution ? State the importance of elution in this process.
SECTION- C
(Case Based)
13. (a) Read the paragraph given below and answer the questions that follow:
Enzyme Taq polymerase, is extracted from a eubacterial microorganism
Thermus aquaticus from Yellowstone National Park in Montana, USA
and isolated by Chien et al. (1976). Taq polymerase successfully
replaced the DNA polymerase from E.coli that was being used in PCR
earlier and this shift revolutionised the PCR technique.
() Taq polymerase after its discovery replaced E.coli DNA polymerase
in PCR technique. Explain giving reasons why was the need felt for
thechange?
(i) What is a primer and its importance in PCR ?
ii) Write the importance of PCR as a diagnostic tool
OR
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b) Read the
following paragraph and answer the questions that follow :
Biotechnology revolves around the "gene of interest", with an objective
to various avenues for human welfare in
open
health, medicine,
pharma, agriculture etc. using different
techniques, tools and processes.
One of the
breakthroughs of biotechnology in medicine is the gene
therapy.
G) Name the human disease for which the
gene therapy was used for
the first time.
(i) Explain the steps of gene therapy carried to the disease
cure using
the lymphocytes of the patient. Why is this therapy not a
permanent cure of the disease ?
(ii) Write the possible permanent cure of the disease by the gene
therapy that is in progress.
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