THE PRIME MINISTER’S OFFICE AND
REGIONAL ADMINISTRATION
KISIMIRI SECONDARY SCHOOL
BIOLOGY DEPARTMENT
FORM THREE MID-TERM
EXAMINATION 2015
TIME; 2:3O
Hours
SEPTEMBER 2015
INSTRUCTIONS
·
Answer
all the questions in section A and B and only two questions from section C. Question number 7 in section C is Compulsory.
·
Read
carefully the instructions under each section
·
Except
for diagrams that must be drawn in pencil, all writings should be in blue/black
ink or ball point pen.
·
Failure
to follow instructions will lead into the lost of marks.
SECTION A (15 MARKS)
Answer all questions in this
section.
1.For each item, choose the most correct
answer among the given alternative and
write the answer in the box provided.
I.
All living
things are made up of basic units called………………..
(a) Nucleus (b) Cells
(c) Cytoplasm (d) Nucleoplasm
II.
.
What are the main functions of the nervous system?
(a)Detect stimuli
(b)Transmit nerve impulse and integrate the
activities of other systems
(c)Control the physiological processor
in conjunction with the endocrine system.
(d)Regulate the osmotic balance of the
food.
III.
What
would happen if the plants do not have cell walls?
(a)Unwanted substances would enter the
cell.
(b)Plants cell would lose their shape and rigidity
(c)Useful substances would flow out of
the cell.
(d)Activities of the cell cannot be
carried out.
IV.
Which
of the following process is involved in the transport of Sodium ions against
the concentration gradient?
(a)Osmosis
(b)Active transport
(c)Simple diffusion
(d) Facilitated diffusion.
V.
Which
of the following act as the medium of biochemical reaction in the cell?
(a)Water
(b)Lipid
(c)Glucose
(d) Amino acid
2. Match the items in list A with the
response on list B by writing the letter of the correct responses beside the
item number
|
No.
|
LIST
A
|
LIST
B
|
|
I.
II.
III.
IV.
V.
VI.
VII.
VIII.
IX.
X.
|
Site
for photosynthesis
The
main excretory product eliminated by mammals
Transpiration
An
image behind the retina
The
ability of the body to resist against infections
Fatty
materials which insulate the axon
Transpiration
Outer
zone of the kidney
Detoxification
of poisonous substance in the body
Circulation
of the blood between heart and lungs.
|
A.
Hugging
B.
Sexual contact
C.
Systematic circulation
D.
Pulmonary circulation
E.
Vaccination
F.
Immunity
G.
Mitochondria
H.
Chloroplast
I.
Myopia
J.
Hypermetropia
K.
Urea
L.
Uric acid
M.
Myelin sheath
N.
Schwann cell
O.
Cortex
P.Medulla
Q.
Cooling effect
R.
Heating effect in plant
S.
Liver
T.
Kidney
|
SECTION
B (55 Marks)
Answer all questions from this section.
3.
The diagram below shows a cross-section of the skin.
(a). From the diagram above name:
(i) The layer of skin rich in blood vessels
___________________________________ (2 marks)
(ii) The gland that secretes sebum.
___________________________________ (2 marks)
(b). Dark colored persons have a high
content of the pigment melanin. Name the
layer of the skin that contains melanin.
_____________________________________________________________________
(2 mark) (c). On the diagram label the erector muscle. (2 mark)
|
Sweating
helps to cool the body.
|
(i) Explain how sweating helps to cool
the body.
_________________________________________________________________________
_________________________________________________________________________
____________________________________________________________________ (3 marks)
(ii) Name and describe ONE other process which
allows the body to cool down.
____________________________________________________________________(2
mark)
4(a).Diffusion is a passive type of
transport. Explain.
____________________________________________________________________________
_____________________________________________________________________ (2 marks)
(b)Describe ONE other factor that
affects the rate of diffusion, apart from the surface area to volume
ratio.
________________________________________________________________ (2 marks)
(c).In living things, molecules and ions
are sometimes pumped across the cell membranes.
Name this type of transport.
_____________________________________________________________________
(2 marks)
(d). Describe TWO functions of the cell
membrane.
____________________________________________________________________________
____________________________________________________________________ (4 marks)
(e).
Name the outer layer surrounding the cell membrane in plant cells.
_____________________________________________________________________
(2 marks)
5.
Give a biological explanation for each of the following statements:
(a). Sperms are specialized cells.
(b). Monocotyledons are easily
identified from their leaves.
(c). Living things produce energy.
(d). Digestion is not metabolic
activity.
(2, 3, 2, 3, 2, 3 marks)
(e). Nephrone is the basic unit function
of the kidney Total: 15
marks
6.
Discuss the importance of:
(a). Skin as a protective layer
(b)Insulin in the regulation of blood
glucose level
(c).Osmoregulation in mammals
(d).Bacteria in the root nodules of
leguminous plants
(4,2,3,3,3 marks)
(e).Excretion in living things.
Total: 15 marks
SECTION
C (30 MARKS)
Answer
only two questions from this section. The question number 7 is COMPULSORY.
7. With the help of the well labeled
diagram, discuss the process of Urine
formation. (15 Mark)
8. (a) List down at least seven (7)
functions of the Liver (7 Marks)
(b) Differentiate the following terms
i.
Defecation
and Secretion
ii.
Excretion
and Egestion.
iii.
Diabetes
mellitus and Diabetes inspidus (2x4 Marks)
iv.
Insulin
hormone and Glucagon hormone Total; 8 Marks
9. Write down an essay about MALARIA
under the following guidelines;
i.
Causes
of Malaria
ii.
Mode
of transmission of Malaria
iii.
Symptoms
of Malaria
iv.
Prevention
of Malaria
(2,2,4,4,3,
Marks)
v.
Treatment
of Malaria
Total;15 Marks
BEST WISHES
“The roots of education are bitter, but its fruits are sweeter”.
PREPARED BY ALEX PHILIPO
Kisimiri Secondary School contacts
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