This document contains a science exam for Form 4 students in Malaysia. The exam has two sections - Section A contains 20 multiple choice questions testing students' understanding of topics like the nervous system, reflexes, hormones, inheritance, and cell division. Section B contains longer answer questions testing students' ability to analyze diagrams, graphs, and experiments related to these topics. Some key questions ask students to identify parts of neurons, reflex arcs, the brain and endocrine system. Others involve interpreting graphs of plant growth, completing tables of experimental data, and explaining cell processes like meiosis. The exam was prepared by a science teacher and approved by the head of the science department and assistant principal.

1. SMJK CHONG HWA KUALA LUMPUR
UJIAN SERENTAK 2015
SAINS
TINGKATAN 4
Nama : ________________________________ Tarikh : 4 Mac 2015
Tingkatan : 4 ______ Masa : 1 Jam 30 Minit
Section A: Answer all of the questions. (20 Marks)
1. What is meant by body coordination?
A. To coordinate body’s growth
B. To coordinate position and balance of the body
C. To coordinate body’s responses towards any stimuli
D. To coordinate secretion of hormone by endocrine gland
2. Which of the following is the component of central nervous system?
A. Brain C. Spinal nerve
B. Cranium D. Cranial nerve
3. Diagram 1 represents a neurone.
Diagram 1
1
Dendrites
Cell body
Axon

2. What is the function of the neurone shown?
A. It transmits impulse to an effector
B. It receives impulse from an effector
C. It transfers impulse from sensory neurone to a motor neurone
D. It transmits impulse from motor neurone to a sensory neurone
4. Diagram 2 shows the structure of a neurone.
Diagram 2
Which part A, B, C and D is the dendrite?
5. Nervous coordination requires receptors and effectors. What are the functions of the receptor and
effector?
Receptor Effector
A. Send impulses Detect changes
B. Detect changes Send impulses
C. Detect changes Respond to changes
D. Found in the skin Found in the brain
6. Diagram 3 shows the flow of impulses in a reflex arc for a reflex action.
Diagram 3
What are P, Q and R?
P Q R
A. Relay neurone Sensory neurone Motor neurone
2
Receptor P Q R Effector
impulse
A
B
C
D

3. B. Sensory neurone Motor neurone Relay neurone
C. Motor neurone Relay neurone Sensory neurone
D. Sensory neurone Relay neurone Motor neurone
7. Diagram 4 shows the impulse pathway in nervous coordination.
Diagram 4
Which of the following represents R?
A. Eyes C. Glands
B. Brain D. Muscle
8. What is the function of stretch receptor?
A. To detect pain C. To maintain body posture
B. To detect pressure D. To maintain body temperature
9. Where are proprioceptors found?
A. Muscles, tendons and ligament
B. Ears, throat and oesophagus
C. Tongue, teeth and gum
D. Eyes, nose and mouth
10
.
Diagram 5 shows part of the human central nervous system.
Diagram 5
Which part A, B, C and D controls the heart beat?
11
.
Which activity is an involuntary action?
A. Dancing C. Walking
B. Knee jerk D. Thinking
12 Diabetes mellitus is a condition caused by the undersecretion of a certain hormone. Which of the
3
Stimuli
impulse
Receptor R Effector Response
A
B
C
D

4. . following pairs names the hormone and the relevant endocrine gland correctly?
Hormone Endocrine gland
A. Adrenaline Adrenal gland
B. Insulin Pancreas
C. Thyroxine Thyroid gland
D. Oestrogen Ovary
13
.
Which of the following pairs of nervous coordination and hormone coordination is correctly
matched?
Nervous coordination Hormonal coordination
A. Long-term effect Short-term effect
B. Slow response Immediate response
C. Consist of nerves Consist of ductless glands
D. Widespread target area Limited target area
14
.
Which group of drugs is used to relieve pain?
A. Hallucinogen C. Stimulant
B. Depressant D. Opiate
15
.
Excessive consumption of alcohol can cause
I Loss of muscular coordination III Cirrhosis of the liver
II Quick response to stimulus IV Hallucination
A. I and II C. I and IV
B. I and III D. III and IV
16
.
Diagram 6 shows a process called crossing-over.
4
Diagram 6

5. Crossing over causes
A. Mutation C. Reproduction
B. Growth D. Variation
17
.
Which of the following statements is correct about meiosis?
A. Involved in growth
B. Involves all types of cells
C. Halves the number of chromosomes
D. Genetic contents of daughter cells and parent cells are similar
18
.
Which of the following shows a dominant trait?
A. Blue eyes C. Attached earlobe
B. Curly hair D. Unable to roll the tongue
19
.
Diagram 7 shows the inheritance of the colour of the flower.
Parents :
Gametes :
Offspring :
Diagram 7
What is the phenotypic ratio in the first generation?
Purple White
A. 1 1
B. 1 2
C. 1 3
D. 3 1
20 Diagram 8 shows a monohybrid cross between two rats having different fur colour.
5
Purple
Yy
White
yy
Y y y y
Yy Yy yy yy

6. .
Parents
Phenotype :
Parental
Genotype :
Gametes :
Offspring :
Diagram 8
What is the parental genotype?
Male Female
A. BB Bb
B. Bb Bb
C. Bb bb
D. bb bb
Section B: Answer all of the questions. (30 Marks)
1. Diagram 9 shows an experiment to study the relationship between the number of loads on a spring and
the lengthening of the spring.
6
Male
Black fur
Female
White fur
B b b b
Bb Bb bb bb
x

7. Diagram 9
This experiment is repeated by using different number of loads. The results of the experiment are
recorded in Table 1.
Number of load Lengthening of the spring
(cm)
Table 1
(a) Complete Table 1. (3 marks)
(b) Based on Diagram 9, state the following variables:
(i) Manipulated variable: (1 mark)
__________________________________________________________________________
(ii) Responding variable : (1 mark)
__________________________________________________________________________
2. A student conducted an experiment to study the growth of a corn seedling. The height of the corn
seedling is measured for every two days. The result of the experiment is shown in Table 2
7
8 cm
14 cm
11 cm
17 cm

8. Time/day Height of corn seedling/cm
0 0
2 6
4 20
6 30
8 35
Table 2
(a) Based on Table 3, the height of the seedling increases the most from day_________ to day ________
[1 mark]
(b) Using the data in Table 3, draw a graph of the height of the seedling against time on the graph paper
below.
[2 marks]
(c) What is the relationship between the height of the seedling and time?
8

9. ___________________________________________________________________________________
_
[1 mark]
(d) Predict the height of the seedling on the 10th day.
___________________________________________________________________________________
_
[1 mark]
3. Diagram 10.1 shows the structure of a neurone.
Diagram 10.1
(a) Based on Diagram 10.1, mark (√) for the type of neurone in the box provided. (1 mark)
Sensory neurone Relay neurone Motor neurone
(b) Based on Diagram 10.1, identify the following part:
(2 marks)
P : ________________________________________________
Q: ________________________________________________
(c) State the function of P. (1 mark)
________________________________________________________________________________
(d) Diagram 10.2 shows the pathway of an impulse.
Diagram 10.2
Mark (√) for the location of this type of neurons in Diagram 10.2 (1 mark)
4. Diagram 11 shows the structure of a human brain.
9
Receptor
Central nervous system
Effector
P
Q
R

10. Diagram 11
(a) Name the part labeled as X and Y. (2 marks)
(i) X : _____________________________________
(ii) Y : _____________________________________
(b) What is the advantage of the highly folded surface of X? (1 mark)
________________________________________________________________________________
(c) What is the function of the part labeled as Y? (1 mark)
________________________________________________________________________________
(d) What will happen if part Y is injured? (1 mark)
________________________________________________________________________________
5. Diagram 12 shows the location of the main endocrine glands in the human body.
10
X
Y

11. Diagram 12
(a) (i) State the label and name the endocrine gland in Diagram 12 that is known as the ‘master gland’ of the
endocrine system. (2 marks)
________________________________________________________________________________
(ii) State the reason why is it known as the ‘master gland’? (2 marks)
________________________________________________________________________________
(b) Name a hormone secreted by N. (1 mark)
________________________________________________________________________________
6. Diagram 13 shows the phases of a cell division.
11

12. Diagram 13
(a) (i) Name this type of cell division. (1 mark)
________________________________________________________________________________
(ii)Give one reason for your answer in 5(a)(i). (1 mark)
______________________________________________________________________________
(b) What process occurs during stage Q? (1 mark)
________________________________________________________________________________
(c) Name two organs of the body where this cell division occurs. (2 marks)
________________________________________________________________________________
~~ END OF QUESTION PAPER ~~
Disediakan oleh: Disemak oleh: Disahkan oleh:
(NURUL AINI BINTI MD DESA)
Guru Sains
(CHIN HUEY WEN)
Ketua Bidang Sains dan
Matematik
(LOW SIOW NGO)
Penolong Kanan Tadbiran Dan
Kurikulum
12