Practice paper written in the KCSE Biology Paper 1 style. This is not an official KNEC paper.
Answer all the questions in the spaces provided.
-
Name the organelle in which each of the following takes place: (a) Aerobic respiration (1 mark) (b) Protein synthesis (1 mark)
-
State two differences between plant and animal cells. (2 marks)
-
A potato cylinder was placed in a concentrated sugar solution for 30 minutes. (a) State what happened to the length of the cylinder. (1 mark) (b) Explain your answer in (a). (2 marks)
-
(a) Write the word equation for photosynthesis. (2 marks) (b) Name two raw materials for photosynthesis. (2 marks)
-
State three adaptations of the alveoli for gaseous exchange. (3 marks)
-
(a) What is the name of the reagent used to test for starch? (1 mark) (b) State the colour observed for a positive result. (1 mark)
-
Name the blood vessel that carries: (a) oxygenated blood from the lungs to the heart (1 mark) (b) blood from the heart to the lungs (1 mark)
-
Give two functions of the liver in homeostasis. (2 marks)
-
In a cross between two heterozygous tall pea plants (Tt × Tt), where T is dominant for tallness: (a) Show the genotypes of the offspring using a Punnett square. (3 marks) (b) State the phenotypic ratio of the offspring. (1 mark)
-
State two ways in which wind-pollinated flowers are adapted to their mode of pollination. (2 marks)
-
Define the term ecosystem. (2 marks)
-
Name the hormone that: (a) lowers blood sugar level (1 mark) (b) prepares the body for "fight or flight" (1 mark)