AHSEC| CLASS 11| BIOLOGY| QUESTION PAPER - 2017| H.S.1ST YEAR
2017
Biology
(Theory)
Times: 3 hours
Full marks: 70
Part - I (Botany)
1. Who discovered plant nucleus? 1
2. Who proposed transpiration pull and cohesion of water
theory? 1
3. What is the full form of EMP pathway? 1
4. Define autotrophic and heterotrophic plants with
examples. 2
5. Draw and label the moss capsule. 2
6. Mention the four major characters of prokaryotic
cell. 2
7. Write the specific roles of IAA. 2
8. Mention two examples each of long-day and short-day
plants. 2
9. Differentiate between dicotyledonous and monocotyledonous
plants with examples. 2
10. Define inflorescence. Explain the chief differences
between racemose and cymose inflorescences with examples. 1+2=3
11. Write the structure and functions of mitochondria with
diagram. 1+1+1=3
12. What is transpiration? Discuss the role of stomata in transpiration. 1+2=3
13. What is tissue system? Write the different types of
vascular bundles found in the angiospermic plants with examples. 1+4=5
14. Define photosynthesis. Write the prime differentiating
characters of cyclic and non-cyclic photophosphorylation’s. 1+2+2=5
Or
Describe the
external and internal factors affecting in photosynthesis. 5
Part – II (Zoology)
1. Fill in the blanks: 1x5=5
(a) Polymorphism
is notable in the phylum __________.
(b) The chemical
bonds which connect two amino acids are ________.
(c) Nissl’s granules
are found in ________cell.
(d) RBC has the
life span of about ________days.
(e) Estrogen is
secreted by ________.
2. Write the answer very briefly (any four): 1x4=4
(a) In which
form animal store carbohydrate?
(b) What is haemolymph?
(c) What is G0
of cell cycle?
(d) Name the
vitamin essential for blood coagulation.
(e) What is
relaxin?
(f) What is Bowman’s
capsule?
3. Write the difference between the following (any
two): 2x2=4
(a) Bilateral
symmetry and Radial symmetry
(b) Apoenzyme
and Holoenzyme
(c) Diabetes
mellitus and Diabetes insipidus
(d) Rods and
Cones
4. Answer the following briefly (any three): 2x3=6
(a) “Bat is a
mammal, not bird.” Justify the statement through comparison.
(b) Why is
enzyme renin important for infants?
(c) Write the
importance of haemodialysis.
(d) “Gonads are
also endocrine glands.” Explain the stamen.
(e) Why is the
S-A node termed as pacemaker of the heart?
5. Write short notes on (any two): 3x2=6
(a) Egg laying
mammals
(b) Haldane’s
effect
(c) Blood group
(d) Tidal volume
(e) Synapse
6. What is cell cycle? Describe the first prophase stages of
first meiosis division with suitable diagram. 1+4=5
Or
What is nucleic
acid? Write the structure of DNA as explained in Watson and Crick model. Mention
the two important functions of DNA.
1+3+1=5
7. What is blood coagulation? Describe the process of blood coagulation.
Name the two natural anticoagulants in blood.
1+3+1=5
Or
What is organ of
Corti? Describe briefly the structure and function on human ear. 1+2+2=-5
***
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