HIKMAH MODULE 68 SCIENCE SPM MODULE 8 PAPER 1 1. The table below shows the temperature and pH some bacterial culture in a petri dish. Table 1 Which petri dish was cloudier after two days? A. P B. Q C. R D. S 2. Active immunity is obtained when vaccine which injected into the blood stream A. requires antibiotic for treatment B. stimulates t he body to produce white blood cell C. stimulates t he body cells to produces antibody D. requires serum containing antibody. 3. Algae are neither parasite nor saprophyte because they are A. Do not c arry out respiration. B. Carry out photosynthesis C. Can live without doing any activ ity D. Can synthesize organic substances
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1. The table below shows the temperature and pH some bacterial culture in a petri dish.
Table 1
Which petri dish was cloudier after two days?
A. PB. QC. RD. S
2. Active immunity is obtained when vaccine which injected into the blood stream
A. requires antibiotic for treatmentB. stimulates the body to produce white blood cellC. stimulates the body cells to produces antibodyD. requires serum containing antibody.
3. Algae are neither parasite nor saprophyte because they are
A. Do not carry out respiration.
B. Carry out photosynthesisC. Can live without doing any activityD. Can synthesize organic substances
1. Figure 1 shows an experiment carried out to study the effect of pH on the growth ofmicroorganisms.
Figure 1
Three sterile test-tubes labeled A, B and C with different pH are placed in the dark placeat room temperature for two days. The observations are after two days.
a. What is the hypothesis of this experiment?
b. Which test-tube is the cloudiest?
c. Why do we need to sterilise the test-tubes, cotton wool and nutrient agar beforethe experiment?
d. State the manipulated variables of this experiment.
e. Base on this experiment, state the meaning of the microorganism(operational definition)
5. Figure 5 shows an experiment to study the effect of an antibiotic on bacterialgrowth.
Figure 5
Three antibiotic discs, A1, A2 and A3 with different concentrations are placed onnutrient agar surface. The petri dish is incubated inverted at 37oC. After two days, aclear area is formed around each disc. The diameter of the clear area is measuredand recorded in Table 2.
Antibiotic Disc Diameter of the clear area (cm)
A1 1.2
A2 0.6
A3 1.6
Table 2a. State one hypothesis for this experiment.
a. Suggest one suitable hypothesis to investigate the above statement.b. Explain an out line of the experiment to test the hypothesis base on the following
criteria:i. Aim of experiment.ii. Identifying variablesiii. List of material and apparatusiv. Methodv. Tabulation of data
2. a.
State four differences between viruses and bacteria.
b.
Explain how the residents in the area overcome the problem caused by
mosquitoes. Your answer should include the following:Identify the problemClarification the problemSolving methodsChoose the best method and explain your choice.
3. Study the following statement.
You are given some sterile nutrient broth and bacterial culture.a) Suggest a hypothesis to investigate the above statement.b) Describe one experiment to test your hypothesis based on the following criteria.
i. aim of the experimentii. identifying the variablesiii. list of apparatus and materialiv. methodv. tabulation of data
Light can effect the growth and reproduction of bacteria
Dengue fever is cause by a virus whereas tuberculosis is caused by bacteria
The residents of Kampong Kuala Paya were caught off guard by the news of
boy in their neighbourhood being effected by dengue fever. The residents
decided to overcome the problem.
Temperature influences the growth of microorganism.
PAPER 11. C 2. C 3. B 4. A 5. B 6. B 7. D 8. D 9. D 10. A
PAPER 2
SECTION A + B
1.a. Neutral environment with pH is the most suitable for the growth of bacteria.b. Test-tube Ac. to ensure bacteria from outside do not interfere with the result of the experiment.d. pH valuee. Microorganism is shown by the cloudiest of nutrient agar.
2.a. room temperature is the most suitable temperature for the growth of themicroorganism.
b. type of bacteria/volume of nutrient agar/pHc. test-tube B is cloudy because the microorganism/bacteria is suitable for growth atroom temperature.d. microorganism cannot grow at very low temperature.e. yes, it does
3.a. pupaeb. mosquitoes carried pathogen.c. i. dengue fever ii. Malariad. spray insecticides.
4.a. pupae, larvaeb. cover food properly ; clean the garbage and sewagec. cholera
5.a. antibiotic can kill bacteriab. i. different concentrations of antibiotic.
ii. diameter of the clear areaiii. type of bacteria/ room temperature@ 370C
c. to prevent water vapour from interfere the result of the experiment.d. Antibiotic is shown by the diameter of the clear area.f. syphilis/gonorrhea.
6.a. artificial active immunityb. rubella/chickenpox….c. as a booster dose to increase the antibody level .d. substance(weakened/dead pathogens) that stimulate white blood cell to produceantibodies.
7.a. the most suitable temperature for the growth of the microorganism/bacteria is 370C
b. i.
ii. 360C +_ 1
iii.0/zero/none
SECTION C
Criteria Explanation
i.Aim To study the effect of light to the growth andreproduction of bacteria.
ii. Identifying variables i. manipulated variables: light conditionsii. fix variables: same quantity of nutrientagar/same type of bacteria/samepH/temperature(room temperature).iii. responds variables: the growth ofbacteria(the cloudiness of nutrient agar)
iii.List material and apparatus a. bacterial culture, nutrient agar