GRADE 8
BIOLOGY
CLASS TEST TERM 1
Name : Final Marks :
Date :
Parent’s Signature
Total Marks : .........../80
Biology
1 hour 30 minutes
Section A. Multiple Choice (in GFORM)
20 marks
Section B. Structured Question
60 marks
READ THESE INSTRUCTIONS FIRST
Write your name in the spaces at the top of this page.
Write in dark blue or black pen in the spaces provided on the Question Paper.
You may use a pencil for any diagrams, graphs, or rough working.
Do not use staples, paper clips, highlighters, glue or correction fluid.
Answer all questions.
The number of marks is given in brackets [ ] at the end of each question or part question.
You may lose marks if you do not show your working or if you do not use appropriate units.
A Data Booklet is provided.
HF/CTW1/BIO/G8/2021-2022 Page 1
SECTION B. STRUCTURED QUESTION
1 Complete the sentences about food and digestion using words from the list.
Each word may be used once, more than once, or not at all.12p21q3
absorbed antibodies bacteria duodenum
egested enzymes fat stomach water
The ................................. secretes hydrochloric acid. One function of this acid in the body is to
kill .................................. in the food. Most food that is eaten has to be digested before it can
be ................................ by the body. Most chemical digestion is carried out by special proteins
called .................................... One component of the diet that does not need to be digested is
....................................
[5]
[Total: 5]
2 Fig. 2.1 shows a diagram of digestive organs.
Fig. 2.1
(a) Use the letters on the diagram above to identify:
the large intestine, ...........................
the pancreas, ...........................
the stomach. ........................... [3]
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(b) State one function for each of these parts of the alimentary canal.
Large intestine
.................................................................................................................................................
.................................................................................................................................................
Pancreas
.................................................................................................................................................
.................................................................................................................................................
Stomach
.................................................................................................................................................
.................................................................................................................................................
[3]
(c) (i) On the diagram above draw a label line to show where bile is made.
Label it X.
[1]
(
(ii) State the action that bile has on fats in the small intestine.
...................................................................................................................................
...................................................................................................................................
.......................................................................................................................... [1]
(iii) Explain how this action speeds up the digestion of fats.
...................................................................................................................................
...................................................................................................................................
...................................................................................................................................
............................................................................................................................. [2]
[Total: 10]
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3 Many types of enzymes are involved in digestion.
(a) State the general function of enzymes.
.................................................................................................................................................
....................................................................................................................................... [1]
(b) State the names of three digestive enzymes in the human alimentary canal.
1 .......................................................................
2 .......................................................................
3 ………………………………………………….. [3]
(c) Explain the importance of chemical digestion.
.................................................................................................................................................
.................................................................................................................................................
.................................................................................................................................................
....................................................................................................................................... [3]
(d) Explain the role of mechanical digestion.
.................................................................................................................................................
.................................................................................................................................................
.................................................................................................................................................
....................................................................................................................................... [3]
[Total: 10]
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4 Blood is made up of four major components. One component is a liquid, while the others are
solid.
Name the four major components of blood and state their function.
Name..............................................................................................................................................
function...........................................................................................................................................
........................................................................................................................................................
Name..............................................................................................................................................
function...........................................................................................................................................
........................................................................................................................................................
Name..............................................................................................................................................
function...........................................................................................................................................
........................................................................................................................................................
Name..............................................................................................................................................
function...........................................................................................................................................
.................................................................................................................................................. [8]
[Total: 8]
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5 Fig. 5.1 shows the human heart and the main blood vessels. The functions of the parts of the
heart and some of the blood vessels are given in Table 5.1.
Fig. 5.1
(a) Complete Table 5.1.
One row has been done for you.
function letter on name
Fig. 1.1
structure that separates oxygenated and
deoxygenated blood
structure that prevents backflow of blood from
ventricle to atrium
blood vessel that carries oxygenated blood A aorta
blood vessel that carries deoxygenated blood
structure that prevents backflow of blood from
pulmonary artery to right ventricle
chamber of the heart that contains oxygenated blood
chamber of the heart that contains deoxygenated
blood
[9]
[Total: 9]
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6 Coronary heart disease (CHD) is a disease of the circulatory system.
State four risk factors for developing CHD.
1 ..............................................................................................................................................
2 ..............................................................................................................................................
3 ..............................................................................................................................................
4 ........................................................................................................................................ [4]
[Total: 4]
7 (a) Complete Table 7.1 about heart chambers of Vertebrates.
Table 7.1
Animals Heart chambers
Fish
Amphibians
Reptiles
Birds
Mammals
[5]
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(b) Crocodile’s heart chambers is different compared to other reptiles. State the reason.
.................................................................................................................................................
.................................................................................................................................................
....................................................................................................................................... [3]
[Total: 8]
8 Fig. 8.1 is blood circulation in the human body.
Fig. 8.1
Name the type of circulation and each part labelled with the letter.
• Type of circulation: …………………………………………..
• A: ………………………………………………………………
• B: ………………………………………………………………
• C: ………………………………………………………………
• D: ………………………………………………………………
• E: ………………………………………………………………
[6]
[Total: 6]
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