TUNGUU SECONDARY SCHOOL

FORM FOUR MIDTERM EXAMINATION

BIOLOGY

TIME 2:30 2025

INSTRUCTIONS
1. This paper consists of three (3) sections A,B and C with a total (11) questions
2. Answer all questions in this section A and B and (2) questions from section C
3. Section A carries sixteen (16) marks, section B fifty four (54) marks and section
C carries thirty (30) marks

SECTION “A” (16 marks)

Answer all questions in this section
1. For each of the items (i)-(x), choose the correct answer from the given
alternative and write its letter beside the items number
i. A strong tissue that holds muscle to bones at the joint is
A. Ligament
B. Cartilage
C. Connective tissue
D. Tendon
E. Blood
ii. When a person suddenly sees a lion which hormone is provided by the
body to prepare for fight or flight?
A. Anti-diuretic hormone
B. Adrenalin hormone
C. Aldosterone hormone
D. Progesterone hormone
E. Insulin hormone
iii. Which of the following is likely to happen if blood supply to brain is
poor in man
A. Vomiting
B. Shock
C. Sneezing

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 D. Increase in heart beat
E. Fainting
iv. Urine does not contain glucose because
A. The kidney tubule does not allow glucose to pass through
B. Glucose is respired before reaching the collection duct
C. Glucose passes back into the blood stream from the tubules
D. Blood reaching the kidneys does not contain glucose
E. Glucose is absorbed in the liver and used completely by the body
v. A food sample x turned blue black when treated with iodine solution. The
detected food substance in sample x performs which function in the
human body?
A. Initiate digestion of food
B. Supplies the body with sufficient water
C. Builds up the body
D. Strengthen body immunity by fighting with infections.
E. Provide the body with energy
vi. Crossing unknown genotype of an individual with a homozygous
recessive parent is regarded as
A. Monohybrid cross
B. Dihydric cross
C. Back cross
D. Test cross
E. Vigor cross
vii. When the first day of the menstruation is 8 April on which date a women
of 28 days circle is mostly likely to ovulate
A. 26 March
B. 22 April
C. 5 May
D. 16 April
E. 21 April
viii. After a period of vigorous exercise, you would expert blood flowing front
muscle to have.
A. More carbon dioxide, more oxygen and more glucose
B. Less carbon dioxide, less oxygen and less glucose
C. More carbon dioxide, less oxygen and less glucose
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 D. Moderate carbon dioxide, less oxygen and less glucose
E. More carbon dioxide, less oxygen and more glucose
ix. A pea plant can either be tall or short stem. When a tall stem pea plant
was pollinated with a short stem pea plant, the offspring produced were
200 tall stem plant and 200 short stem plant. Which of the following
represent the genotype of the parent?
A. TT x Tt
B. Tt x Tt
C. Tt x tt
D. TT x tt
E. tt x tt
x. a rapid growth in plants takes place mainly in
A. lungs
B. Cambium
C. Roots
D. Shoot and root tip
E. Stem

2. Match the description of LIST A with corresponding terminologies in LIST

B by writing the letter of the correct response beside the item number in the
answer sheet provided

LIST A LIST B
i. Transformation of seed A. Determinate growth
embryo into a seedling B. Indeterminate growth
ii. An opening that allow the C. Apical dominance
entry of water and oxygen D. Hilum
iii. Growth ceases (stop) when E. Micro Pyle
a certain age is reached F. Seed dormancy
iv. Internal factors necessary G. Seed germination
for seed germination H. Enzyme and hormone
v. A period of reduced I. optimum temperature,
metabolic activities in the moisture and oxygen
seed
vi. Inhibits the growth of
lateral buds during plant
growth

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 SECTION C (30 marks)

Answer all questions from this section. Each question carries 9 marks

3. there is a very big debate to why biology should not be taken as an optional
subject like other optional subjects at ordinary secondary school. You as ans
expert in biology state reasons to why biology should be studied by all “O”
level student (6 points)

4. Water and salt are needed in constant optimal amount for effective and
proper functioning of the body
a). Explain three factors which affect the content of the water and salt in the
human body
b). Mention the two hormones which are responsible for regulation of water
and salts in the body

5. The head teacher of TUMAINI secondary school was served with hot coffee
in a glass. He lifted up the glass of coffee and suddenly droped it due to its
extreme hotness causing it to break into pieces.
a). Name the action which took place in the head master’s body
b). Suggest the name of the pathway followed during this action
c). Draw a well labeled diagram showing components of the nervous
coordination for the action which took place the head master’s body
d). State the significance to the human body of the action named (i)
above

6. (a) A research conducted on human post-natal growth and development

revealed that the rate of the physical determination in some people are
higher than other people of the same age. As biologist mention the causes of
physical deterioration of the human body (3 points)
(b) outline the changes which take place inside the seed before it germinates

7. (a) State Mendel’s first law of the inheritance

(b) Give any four difference between the DNA and RNA

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 (c) Bean seeds placed in a closed bottle containing cold water swollen and
started rotting instead of germinating why?
8. (a) Kiparamoto felt a painful sensation in his oesophagus for two weeks
now
i. Name the digestive disorder which he suffered from
ii. Identify four major causes of disorder named in 8a(i) above

(b) Suggest four measure he would take to avoid disorder infuture

SECTION C (30 MARKS)

Answer two questions from this part including question number 9

9. A middle aged man is regularly visiting the local traditional healer, suspecting
that he has been bewitched by certain old man in his village. He has prolonged
cough and is emitting blood stained sputum whenever he cough. He has not
eaten properly because he has a poor appetite and suffer from weight loss. Also
he is surprised that he sweats during night.
a. Which disease is he likely to be suffering from?
b. Briefly explain the causes and how the disease is transmitted from one
person to another person.
c. What are the four effects of disease which you mention in 9(a) above
d. Explain three to four methods that you are going to use to prevent and
control the disease

10.The body of human being is made up of frame work of interconnected bones

which play crucial roles to the body. Justify the statement (4 points)

11. Suppose you are invited to take part in the debate with the motion which
says ”scientists should find a way of getting rid of all bacteria” argue against
this statement by providing seven points (7 points)