2012Ef4_bio

SMJK (C) CHUNG LING, PULAU PINANG

FINAL SEMESTER EXAM 2012

BIOLOGY FORM 4

(Duration: 2 hours)

Name: Form:

School no: ..

Section A: Objective questions (10 %)

Instruction: 1.Answer section A and B in the space provided.

2. Answer section C and D in foolscap paper.

1. Which of the following are matched

correctly?

I Anatomy the structure and

organization of organisms

II Morphology the form or shape of an

organism

III Entomology insects

IV Zoology plant

A I, II and III only

B I, II and IV only

C I, III and IV only

D I, II, III and IV

2. The results written in scientific report show

A The hypothesis to be accepted or not

B What do the data tell you

C The sets of data obtained

D The materials used in the experiment

3. Which of the following is not found in

plants?

A

B

C

D

4. Diagram 1.0 shows an animal cell

Diagram 1.0

Where is P found abundantly?

A Liver cell

B Epithelial cell

C Pancreatic cell

D Muscle cell

5. A major chemical that regulates the fluidity

of animal cell membranes by stiffening the

membrane at higher temperatures and

preventing the membrane from freezing at

lower temperature is:

A. cholesterol.

B. lipid in nature.

C. a steroid.

D. All of the choices are correct.

6. The diagram 2.0 below shows the condition

of a cell after being immersed in solution Y.

Diagram 2.0

Solution Y is most probably

A 0.5% sucrose solution

B 2.0% sucrose solution

C distilled water

D 0.1% sucrose solution

7. Which of the following is the quaternary

structure of protein?

A.

B.

C.

D.

8. Diagram 3, shows the effect of changes in pH

on the activity of enzyme E.

Diagram 3

Enzyme E is

A pepsin

B rennin

C trypsin

D salivary amylase

9. Which of the following events and

subsequent

products are characteristics of meiosis.

Pairing Of

Chromoso

mes

Number of

Division

Product

A

.

No One Two

diploid

B

.

No Two Four

diploid

cells

C

.

Yes One Four

Haploid

Cells

D

.

Yes Two Four

Haploid

Cells

10 .During Prophase I, homologous maternal and

paternal chromosomes pair up in a process

called synapsis to form

A. bivalents

B. chiasmata

C. sister chromatids

D. chromatin

11. Which of the following is the difference

between the process of mitosis and meiosis?

Mitosis Meiosis

A Four

daughter

cells are

produced

Two daughter

cells are

produced

B

Important for

sexual

reproduction

Important for

asexual

reproduction

C

Daughter

cells are

genetically

different

Daughter cells

are genetically

identical

D

No synapsis

of

homologous

chromosomes

Homologous

chromosomes

undergo

synapsis

12. The statements below show the events

during Prophase I of meiosis.

P The formation of

chiasmata and crossing

over occurs.

Q The chromosomes

shorten and thicken.

R The centrioles migrate to

the poles and the spindle

forms.

S The nuclear membrane

breaks down and the

nucleoli disappear.

Which of the following is the sequence of

events during Prophase I?

A. S P Q R

B. Q P S R

C. P Q R S

D. Q R P S

13. Which of the following is not the correct

match of mineral ions and their functions in

plants?

Mineral

ions Function

A

Phosphor

us

Necessary for cell

division.

B

Potassiu

m

Needed for cell

formation.

C Boron Necessary for the

development of

apical meristems.

D

Iron Activates certain

enzymes.

14. Table below shows observations after four different food tests were carried out on a

food sample.

Test

tube Test Observation

W Millons

test

White

precipitates

are formed

X

Benedict

s test

Blue colour

solution

Y

Sudan

(III) test

A layer of

red colour

oil

Z

Iodine

test

Dark blue

colour

The food sample does not contain

A Proteins

B Lipids

C Starch

D Reducing sugar

15. Which of the following is a correct match

between structure X and its function in diagram

3.0.

Diagram 3.0

X Function

A

Gill

rakers

to strain food

particles

B

Gill

filament

to increase surface

area

C

Gill

arch

covers the

operculum

D

Lamella for gaseous

exchange

16. Diagram 4 shows the structure of the

respiratory system of a cricket.

Diagram 4

What are the structures labelled W, X, Y

and Z?

W X Y Z

A

valve tracheole trachea muscle cells

B

valve

trachea

tracheole

muscle cells

C

valve trachea

muscle cells Tracheole

D

valve

tracheole

muscle cells Trachea

17. One of the adaptations of mangrove trees

is:

A. They have long and penetrating root systems

B. They breathe through specially adapted

leaves

C. Their seeds are viviparous D. Hydathodes exist at the bark of the tree

18. The following are true about the pioneering

species in a colonisation of a habitat.

I. The pioneer species occupies an area in which no life has existed before

II. The pioneer species is highly adaptable III. Bruguiera sp. is a pioneer species in

mangrove swamp colonisation.

IV. The pioneer species alters the habitat it lives in

A.I, II

B. I, II, III

C. I, II, IV

D. I, II, III, IV

19.The quadrat sampling technique is used to

measure all of the following except:

A. Percentage coverage B. Population size C. Frequency D. Density

20. Diagram 5, shows the difference zones of

mangrove swamp.

Diagram 5

What is the pioneer in zone L?

A. Sonneratia sp.

B. Rhizophora sp.

C .Bruguiera sp.

D. Avicennia sp.

1.D 17.C

2.C 18. C

3.D 19.B

4.D 20.D

5.D

6.A

7.A

8.C

9.D

10.A

11.D

12.B

13.B

14.D

15.B

16.A

Please write down the Section As answer in the space below:

Section B: Subjective question (33%)

1. Diagram 1 shows the structure of a plant cell.

Diagram 1

a) Name the organelle T. [1M]

_________________________________________________________________________________

b) Give one function of X. [1M]

_________________________________________________________________________________

c) Describe briefly the function of Y in photosynthesis. [2M]

_________________________________________________________________________________

_________________________________________________________________________________

d) Why is structure Y distributed at the edge of a plant cell? [1M]

_________________________________________________________________________________

e) On diagram 1, label the structure that provides mechanical strength to a plant cell. [1M]

f) What is the most suitable tissue in plants for tissue culture technique? [1M]

_________________________________________________________________________________

1. 5. 9. 13. 17.

2. 6. 10. 14. 18.

3. 7. 11. 15. 19.

4. 8. 12. 16. 20.

X

Y

2. Diagram 2.1 and 2.2 show the effects of both enzyme concentration and substrate concentration on the

rate of amylase reaction on starch.

Diagram 2.1

Diagram 2.2

a) Based on both diagram, state a way to determine the rate of amylase reaction. [1M]

_________________________________________________________________________________

b) Based on both diagrams, explain what had happened to enzyme molecules at point X and Y. [2M]

_________________________________________________________________________________

_________________________________________________________________________________

X

P

R

Y

Q

S

c) Calculate the time taken for the hydrolysis of starch at point X. [1M]

d) Explain the rate of reactions which occur at regions P and Q. [2M]

_________________________________________________________________________________

_________________________________________________________________________________

_________________________________________________________________________________

_________________________________________________________________________________

e) Explain the rate of reactions which occur at regions R and S. [2M]

_________________________________________________________________________________

_________________________________________________________________________________

_________________________________________________________________________________

_________________________________________________________________________________

3. Diagram 3 shows the chemical process of light reaction during photosynthesis

Diagram 3

a) What is meant by photosynthesis? [1M]

_________________________________________________________________________________

_________________________________________________________________________________

b) Based on diagram 3, name S, T and U. [3M]

S: _____________________________________ T: _______________________________________

U: ____________________________________

Light energy

e-

e-

c) Explain how the increase of light intensity affecting the production of S. [2M]

_________________________________________________________________________________

_________________________________________________________________________________

_________________________________________________________________________________

d) Describe two physical structures of leaves to carry out photosynthesis efficiently. [2M]

_________________________________________________________________________________

_________________________________________________________________________________

_________________________________________________________________________________

_________________________________________________________________________________

e) Name a cell that is found in leaves which actively carry out photosynthesis. [1M]

_________________________________________________________________________________

4. Diagram 4 shows the transport of respiratory gases in human body.

Diagram 4

a) Name the structures labelled P and Q. [2M]

P: _________________________________ Q: ___________________________________________

b) Explain how the process of gaseous exchange occurs between Q and blood capillaries. [3M]

_________________________________________________________________________________

_________________________________________________________________________________

_________________________________________________________________________________

_________________________________________________________________________________

_________________________________________________________________________________

c) Name a complex chemical compound found in P. [1M]

_________________________________________________________________________________

Body cell

Blood capillary

`

d) Based on statement above, describe two similarities between X and Q. [2M]

_________________________________________________________________________________

_________________________________________________________________________________

_________________________________________________________________________________

________________________________________________________________________________

e) Name the mechanism that enhances the gaseous exchange between X with water. [1M]

_________________________________________________________________________________

Section C: Essay questions (10%)

1. The following organisms are found in a paddy field community.

a) What is meant by food web? [2M]

b) Based on above organism, construct a food web showing the interaction of all organisms. [2M]

Diagram 5

c) Diagram 5 shows the dynamic relationship between the population of a rat and owl in that paddy

field over the years. Explain the mechanism that occurs in this dynamic relationship. [6M]

X is the respiratory structure of fish which is specialised for gaseous exchange in

water.

Owl, Paddy plant, Rat, Grasshopper, Snake, Caterpillar, Frog

Rat

Owl

Section D: Paper 3 questions (17%)

1. A farmer has a papaya orchard. Since the product of his orchard is abundant, he decided to produce

papaya pickles. He sliced the green unripe papaya and immersed the slices in water and then soaked in

the sugar solution. When the papaya slices were immersed with water, the slices became turgid and

increased in their sizes. However, when the papaya slices were soaked in sugar solution, the slices

became soft and shrunken.

Based on the observation, plan an experiment to identify the concentration of sugar solution which

is isotonic to the cell sap of the papaya

The planning of your experiment must include the following aspect:

Problem statement

Aim of the experiment

Hypothesis

Variables

List of the apparatus and materials

Technique used

Procedure of the experiment

Presentation of data

Conclusion

Documents

2012Ef4_bio