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Biology Question Paper

Biology

Course:Secondary Level

Exam Year:2009

1.Name a carbohydrate used in determining osmotic pressure of cells.(1mk) 2.a)Name the causative agent of malaria.(1mk) b)State two measures of controlling malaria.(2mks) 3.Give two reasons why accumulation of lactic acid during vigorous exercise leads to an increase in heart beat.(2mks) 4.a)Name the type of response exhibited by the Euglena swimming towards fresh water from saline water.(1mk) b)State the survival value of the response exhibited in 4a) above.(1mk) 5.A leaf of a growing plant which had been covered with a black polythene paper was smeared with vaseline petroleum jelly,on its lower surface and exposed to sunlight six hours.Starch test on the leaf was negative.Explain the observation.(3mks) 6.a)What do you understand by the term genetic variation.(1mk) b)Name two sources of discountious variation.(1mk) 7.State the role of the following hormones in metamophosis in insects. i)juvenile hormones. ii)moulting hormone.(Ecdysone) (2mks) 9.State how the following tissues enhance support in plants,collenchyma,sclerenchyma,parenchyma.(3mks)

Biology Question Paper

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