Question 1
1. Name the product of anaerobic respiration that is essential in
a) The brewing industry
b) The bread making industry
Answer
a) The brewing industry - Ethanol
b) The bread making industry - Carbon (IV) Oxide
b) The bread making industry - Carbon (IV) Oxide
Question 2
a) What part of the human body is affected by the virus that causes poliomyelitis?
b) What is a vaccine?
c) Other than poliomyelitis name another immunizable disease in Kenya
Answer
a) Joint / muscles
b) Vaccine - A substance rich in weakened antigens.
c)
b) Vaccine - A substance rich in weakened antigens.
c)
- Measles
- whooping cough
- diphtheria
- tetanus
Question 3
A student mixed a sample of urine from a person with Benedict’s solution and heated
a) What was present in the urine sample?
b) What did the student conclude on the health status of the person?
Answer
a) Glucose
b) The patient was suffering from diabetis mellitus.
b) The patient was suffering from diabetis mellitus.
Question 4
Study the diagram below of a neurone in human being.
a) Identify the type of neurone.
b) Name the parts labelled A and B.
A
B
c) On the diagram indicate the direction of movement of a nerve impulse along the neuron .
Answer
a) Motor neurone
b) A - Axion
B - Schwan cell
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b) A - Axion
B - Schwan cell
c)
Question 5
In an experiment, it was observed that when maggots are exposed to light, they move to dark areas. On the other hand , Euglena and Chlamydomonas move towards light.
a) Name the type of response exhibited by the organisms
b) State one advantage of the response shown by Euglena and Chlamydomonas
Answer
a) Phototactic/ Phototaxis/ Phototaxism
b) To trap light energy for use in photosynthesis.
b) To trap light energy for use in photosynthesis.