Model Question Paper - 2 (unsolved) XI BIOLOGY (Theory)

Time: 3 Hrs.]

[M.M:70]

General Instruction:

1. All questions are compulsory.

1. The questions paper consist of four section A, B, C and D. Section 'A' Contain 8 quetions of 1 mark each. Section 'B' is of 10 questions of 2 marks each. Section 'C' has 9 questions of 3 marks each. Section 'D' is of 3 question of 5 marks each.

1. There is no overall choice. However, and intornal choice has been provided in one question of 2 marks. One question of 3 marks and all the three questions of 5 marks.
2. Wherever necessary, the diagram draw should be neat and properly cabelled.

Section 'A'

1. What is the function of epiglottis in human?
2. At which stage of cell division, the morphology of chromosomes can be distinctly studied?
3. What is the function of gizzard?
4. Name the phyllotaxy in Asltonia.
5. Name the algal and fungal components of Lichens respectively.
6. Which has more number of series, a genus or a family?
7. Name the functional unit of a skeletal muscle.
8. Select the ammonotelic animals from the following: Mammals, bony fishes, birds, reptiles, aquatic insects.

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Section 'B'

1. "Cell is the basic unit of life." Justify this statement.
2. How does competitive inhibitor inhibits the activity of an enzyme ? Explain with an example.

Mammals are the most successful and dominant animals. Provide any four evidences in favour of this statement.

Describe the role of various enzymes in the digestion of protiens in our alimentary canal.

What will happen to a plant cell, if it is kept in (a) hypertonic solution

1. hypotonic solution.

1. What is (a) ultra filtration (b) tubular secretion in relation to urine formation.

Slides of T.S. of monocot stem and T.S. of dicot stem are provided to you. How would you differentiate them anatomically?

1. Where does electron transport system occur in mitochondria? State the role of oxygen in ETS.
2. Describe the role of red blood cells in the transport of carbon dioxide in blood.

OR

Where are calcium ions stored in a muscle fibre ? How do calcium ions affect the process of muscle contraction?

1. In the given table, showing name of some harmones and their functions, some gaps are blank; Full in the blanks 'a' to 'd'

Name of harmone Function

1. Glucagon (a)
2. (b) controls the metabolism of protein, fats and carbohydrates
3. Thymosin (c)
4. (d) Stimulates reabsorption of water and electrobytes by the distal tubules.

166