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Friday, May 22, 2020

AHSEC - Class 11 Question Papers: BIOLOGY' 2018


2018
BIOLOGY
(Theory)
Full Marks: 70
Time: Three hours
The figures in the margin indicate full marks for the questions.
Part – I (Botany)
1. What is inflorescence? Mention the special types of inflorescence with example.      1+2=3
2. Define transpiration. Write its types.                  1+2=3
Or
Explain the graphic representation of Glycolytic process of plant respiration.                   3
3. Who discovered the plant cell?                             1
4. What are stomata?                     1
5. Why is potato called underground stem?                         1
6. Name four whorls of a complete flower.                          2
7. Write the harmful role of fungi.                            2
8. Differentiate between simple tissue and complex tissue.                         2
9. Draw and label an yeast cell.                  2

10. Distinguish between prokaryotic cell and eukaryotic cell.                        2
11. What is hormone? Mention various growth hormones found in plants.                           1+2=3
12. Describe the different types of vascular bundles found in the plants.                               3
13. Define mitochondria. Describe the structure and functions of mitochondria with diagram. 1+4=5
Or
What is five-kingdom classification? Write the major characters of five-kingdom classification.           1+4=5
14. Describe the major differentiating characters in between Calvin cycle (C3 plants) and Hatch-Slack pathway (C4 plants) of photosynthesis.                               5
Part – II (Zoology)
1. Choose the correct answer:                   1x5=5
a)         Which one of the following animals is hermaphrodite?
1)         Honey bee.
2)         Housefly.
3)         Ascaris.
4)         Leech.
b)         ‘Islets of Langerhans’ is found in
1)         Spleen.
2)         Liver.
3)         Pancreas.
4)         Pituitary gland.
c)          The number of cranial nerves in a mammal including man is
1)         10.
2)         12.
3)         24.
4)         36.
d)         Antigen is not present in which of the blood groups?
1)         Blood group A.
2)         Blood group B.
3)         Blood group AB.
4)         Blood group O.
e)         The primary structure of protein is due to
1)         Hydrogen bonds.
2)         Peptide bonds.
3)         Ionic bonds.
4)         Disulphide bonds.
2. Write the answer very briefly (any four):                         1x4=4
a)         What is ‘flame cell’?
b)         What is called the pacemaker of the heart?
c)          What is the function of rennin?
d)         Why is toad called poikilothermic?
e)         What is synapse?
f)          What is anaerobic respiration?
3. Write the difference between the following (any two):                            2x2=4
a)         Bilateral symmetry and Radial symmetry.
b)         Ectoparasite and Endorparasite.
c)          Blood and Lymph.
d)         Ureotelic animal and Uricotelic animal.
4. Answer the following briefly (any three):                         2x3=6
a)         Write four distinctive characters of mammalian.
b)         Why is meosis division most essential for sexually reproduced animal?
c)          Why is enzyme called as organic catalyst?
d)         What is Bohr’s effect?
e)         Write the chemical properties of hormone.
5. Write short notes on (any two):                           3x2=6
a)         Prototheria.
b)         Connective tissue.
c)          Dentition in man.
d)         Cell cycle.
e)         Reflex action.
6. What is digestion? Write briefly the process of digestion in stomach.                  1+4=5
Or
What is hemoglobin? Write the role of hemoglobin in the transportation of oxygen and carbon-dioxide present in the blood.                   1+4=5
7. What is excretion? What are the excretory products? Write the process of urea formation.                     1+1+3=5
Or
What is nucleic acid? How many types of nucleic acid are there? Describe the molecular structure of DNA.         1+1+3=5

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