Name : ____________________ Form : 5 _____ SM SUNG SIEW, SANDAKANCHAPTER 1 TOPICAL TEST

FORM 5SCIENCEOne hour

SECTION A [25 MARKS]Answer all questions in this section.

1. Which of the following statements is correct for bacteria?A. Bacteria have nuclei. B. Bacteria come in different

shapes. C. Bacteria are multicellular

organisms. D. Bacteria are found only in moist

damp habitats.

2. Diagram below shows a type of bacteria.

The bacteria has the shapes of aA. coccus. B. bacillus.C. vibrio. D. spirillum

3. Which of the following statements is true for a bacteriophage?A. It lives as a parasite. B. It is a type of protozoan. C. It destroys human red

blood cells. D. It is transmitted in the

body through food.

4. Which of the following arrangements is correct to show the arrangement of the organisms P, Q and R listed below according to their sizes beginning with the smallest organism?

A. R, Q, R B. Q, P, RC. Q, R, P D. R, Q, P

5. Bacteria produce spores when

A. the toxins have been produced.

B. the process of reproduction has begun.

C. attacked by bacteriophage virus.

D. conditions are unfavourable for growth.

6. Why are Petri dishes with bacteria culture experiments kept inverted?A. To prevent bacteria from the

outsides from entering the Petri dish B. To make it easier for

observations to be made on the bacterial colonies

C. To prevent condensed water from disturbing the bacterial growth

D. To encourage the reproduction and growth of bacteria

7. The following is a list of microorganisms

Which microorganisms belong to the same group?A. P and QB. P and SC. Q and RD. R and S

8. Diagram below shows two types of microorganisms.

What is the similarity between these microorganisms?A. Both microorganisms can

reproduce by spore formation

B. Both microorganisms: can make their own food.

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C. Both microorganisms are fungi.

D. Both microorganisms are unicellular.

9. Chlamydomonas and spirogyra are two microorganisms belonging to the same group. What is the group of the microorganisms?A. algae. B. bacteria.C. fungi. D. protozoa

10. Which of the following is not a factor which affects the growth of microorganisms?A. Nutrients B. Humidity C. Light D. Colour

11. A healthy person will be infected with dengue fever if bitten by aA. Culex mosquito.B. Aedes mosquito.C. Anopheles mosquito.D. Dengue mosquito.

12. Which of the following diseases are caused by fungi?I SyphilisII TineaIII Ringworm A. I and II only B. I and III only C. II and III only D. I, II and III

13. The above diseases is due to infection byA. fungi. B. bacteria.C. viruses. D. protozoa.

14. Which of the following diseases is wrongly matched with its way of infection?

15. Diagram below shows the life cycle of the housefly.

What is the best way of controlling the housefly during stage P?A. Sleep under a netB. Clean the house compound

of rubbish which can hold stagnant water

C. Throw rubbish in a covered dustbin

D. Rear fish in ponds

16. Diagram below shows the production of antibodies in the human body after injecting with substance T.

Which of the following statements are true for substance T?I. Substance T is an

antiserum.II. Substance T is obtained

from human lymphocytes.III. The immunity obtained

is temporary and fast.A. I and II only B. I and III onlyC. II and III only D. I, II and III

17. The nodules found in the roots of legumes have a type of microorganism labelled as X. Which of the following is X and its mode of nutrition?

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18. Which of the following groups of micro-organisms produces cellulase to help in the digestion of food in animals?A. Bacteria B. VirusC. Fungi D. Alga

19. Vaccination against T.B. is aimedI. to immunize the patient

from getting the disease.II. to stimulate the body to

produce more white blood cells.III. to stimulate the body

to produce antibodies.A. I only B. III only C. II and III only D. I, II and III

20. Which of the following microorganisms are used in the making of bread and cakes?A. Fungi B. Bacteria C. Protozoa D. Algae

21. The following foods use microorganisms in their production.

What microorganisms are used in these foods?A. Viruses B. Bacteria C. Fungi

D. Algae

22. Penicillin, an antibiotic, is prepared fromA. a fungus.B. a bacterium. C. an alga. D. a virus.

23. In the balance of nature, microorganisms play a role inI. recycling of the natural

resources.II. treating the sewage.

III. being important components of the ecosystem.

A. I and II only B. I and II only C. II and III only D. I, II and III

24. How do bacteria help in the decaying process?A. They change nitrogen gas

into nitrates.B. They change plant and

animal proteins into ammonium compounds.

C. They change ammonium compounds into nitrates.

D. They change nitrates into nitrogen gas.

25. What will happen to a person if he takes an overdose of medicine?A. Loss of appetite B. Retarded growth C. Liver damage D. Lowered immunity level

SECTION B [15 MARKS]Answer all questions in this section.

1. An experiment was carried out to study the effect of antibiotics on the growth of bacteria Bacillus sp. Diagram 1 shows the results obtained.

(a) State one hypothesis for this experiment._______________________________________________________________________________

[1 mark](b) State the variables in this experiment,

(i) Manipulated variable:_______________________________________________________________________________

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[1 mark](ii) Responding variable:_______________________________________________________________________________

[1 mark](c) State one observation for the experiment.

_______________________________________________________________________________[1 mark]

(d) Based on this experiment, state the operational definition of antibiotic._______________________________________________________________________________

[1 mark]2. Diagram 2 shows the root system of a plant.

Diagram 2(a) Name the structure labelled P which has bacteria living in it?

_______________________________________________________________________________[1 mark]

(b) i. What is the bacteria found in the part labelled P?_______________________________________________________________________________

[1 mark]ii. What benefit does the bacteria get from the plant?_______________________________________________________________________________

[1 mark](c) What is the importance of the bacteria to the plant shown above?

_______________________________________________________________________________[1 mark]

(d) Name the relationship that exists between the plant and the bacteria?_______________________________________________________________________________

[1 mark]

3. The graph in Diagram 3 shows the levels of antibodies in the blood of a man after injections of antiserum to fight against a disease.

Diagram 3(a) What type of immunity is shown in the above graph?

_______________________________________________________________________________[1 mark]

(b) Why is the second dose of injection given to the man?_______________________________________________________________________________

[1 mark](c) What is an antiserum?

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_______________________________________________________________________________[1 mark]

(d) Name a disease that requires injection of an antiserum to give immunity._______________________________________________________________________________

[1 mark](e) State one difference between injection of an antiserum and injection of a vaccine.

______________________________________________________________________________________________________________________________________________________________

[1 mark]

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