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Biology Paper 1 Question Paper

Biology Paper 1

Course:Secondary Level

Exam Year:2009

Instructions:Answer all the questions. 1.Which organelles would be abundant in: a)Skeletal muscle cell. b)Secretory cell. c)Palisade cell.(3mks) 2.Name the structure that controls movement of substances in and out of the cell.(1mk) 3.Outline what happens in the dark stage of photosynthesis.(2mks) 4.How do capillaries differ from other blood vessels?(3mks) 5.In what form are the following transported in blood? a)Oxygen. b)Carbon (iv) oxide.(2mks) 6.State two major structural differences between red blood cell and white blood cell.(2mks) 7.Why is it impossible to drown a grasshopper by holding its head under water?(2mks) 8.Name the two plant divisions that display clear alternation of generations.(2mks) 9.Identify the type of response exhibited by the following: i)Pollen grain growth towards ovules. ii)A seedling growing in a dark room grows towards a window.(2mks) 10.Explain why some desert animals excrete uric acid rather than ammonia.(2mks) 11.Explain why plants shed off their leaves.(2mks) 12.State three differences between an ovum and a sperm.(3mks) 13.Describe the role of each of the following hormones in the human menstrual cycle. i)Oestrogen ii)Progesterone iii)Luteinising hormone(LH) 14.Give three factors that determine the amount of energy a human being requires in a day.(3mks) 15.a)What is homeostasis?(2mks) b)Name thre processes in the human body which homeostasis is involved.(3mks)

Biology Paper 1 Question Paper

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