Friday, May 22, 2020

AHSEC - Class 11 Question Papers: BIOLOGY' 2017


2017
BIOLOGY
(Theory)
Full Marks: 70
Time: Three hours
The figures in the margin indicate full marks for the questions.
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 1AA.                             2

8. Mention two examples each of long-day and short-day plants.                             2
9. Differentiate between dicotyledonous and monocotyledonous plants with examples.      3
10. Define inflorescence. Explain the chief differences between racemose and eymose 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.
14. Define photosynthesis. Write the prime differentiating characters of cycle and non-cyclic photophosphorylations.  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)         Apo enzyme and Holoenzyme.
c)          Diabetes melli8tus and Diabetes insipidus.
d)         Rods and Cones.
4. Answer the following briefly (any three):                         2x3=6
a)         “Bat is mammal, not bird.” Justify the statement through comparison.
b)         Why is enzyme rennin important for infants?
c)          Write the importance of hemodialysis.
d)         “Gonads are also endocrine glands.” Explain the statement.
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 of human ear.      1+2+2=5

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