chapter 1 microorganisms.doc

8/17/2019 Chapter 1 Microorganisms.doc

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Name: ……………………………………………… Class : ……Chapter 1Exercise 1Learning Area: Microorganisms and Their Effects on Living ThingsLearning Obective: !nderstanding the classification of microorganisms"

1" #ased on their characteristics$ microorganisms can be classified into five gro%ps" Complete thediagram belo&"

'" (iagram belo& sho&s microorganisms"

A # C ( E

)dentif* the gro%p of microorganisms A$ #$ C $ ( and E

A: …………………"" #: …………………"" C: …………………………

(: …………………… E: …………………""

+" Complete the table belo&,

Characteristic Group of

microorganisms

-a. Exist in different shapes and are generall* named accordingto their shapes"

-b. Cannot reprod%ce o%tside living cell"

-c. Can be cr*stalli/ed"

-d. The* are able to ma0e their o&n food b* photos*nthesis"

-e. Most reprod%ce asex%all* b* formation of spores or sex%all*b* con%gation"

-f. The* are %nicell%lar animals and have the str%ct%re of generalanimal cells"

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FIVE GROUPS OF MICROORGANISMS

Score: …./16 x 100 = …….%


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Name: ……………………………………………"" Class : ……Chapter 1Exercise 'Learning Area: Microorganisms and Their Effects on Living ThingsLearning Obective: *nthesising ideas abo%t the factors that affect the gro&th of microorganisms"

1" The gro&th of microorganisms is ver* m%ch affected b* environmental factors s%ch as

-a. ……………………………"" -b. ……………………………… -c. ……………………………""

-d. ……………………………"" -e. ………………………………

Cl%e :

'" (iagram 1 sho&s an experiment to st%d* the effect of p2 val%e of medi%m on bacterial gro&th"

After t&o da*s$ the n%mber of bacteria colon* in each dish is co%nted"The res%lts are sho&n in Table 1"

pH value Number of bacteria colony

' 3

4 '5

1+ 3

1-2

6 A ! T E 7 E M 7 T E 8 ) 2 L T 2 p

M ) 9 ! T ) ( 2 E N T ! T 7 ) N

Petri i!" PN%trient agar

2*drochloric acid -p2 '.

#acteria c%lt%re

Petri i!" #N%trient agar

(istilled &ater -p2 4.

#acteria c%lt%re

Petri i!" $N%trient agar

odi%m h*droxide -p2 1+.

#acteria c%lt%re

(iagram 1

Table 1

Score: …./1 x 100 = …….%


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#ased on (iagram 1 and Table 1$ match ection A to ection #"

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Section A Section B

-i. Aim of the experiment

-ii. 2*pothesis

-iii. ;ixed variable

-iv. Manip%lated variable

-v. 7esponding variable

-vi. Al0aline

-vii. )n ne%tral condition

-a. p2 more than 4"

(b.To st%d* the effect of p2 on

the gro&th of bacteriagrowth of microorganisms-c.Microorganisms gro& and

m%ltipl* rapidl*

-d. #acteria gro&th is highest atp2 4

-e.T*pe of n%trients

-f.The gro&th of bacteria

-g. p2 val%e


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Name: ……………………………………………"" Class : ……Chapter 1Exercise +Learning Area: Microorganisms and Their Effects on Living ThingsLearning Obective: Appl*ing 0no&ledge abo%t %sef%l microorganisms"

1" The statements belo& sho& the %ses and roles of beneficial microorganisms in dail* life

& 9east acts on carboh*drate to prod%ce carbon dioxide that ca%se breads and ca0es torise"

' (ead organisms s%ch as plants and animals %ndergo a process called decompositionca%sed b* bacteria and f%ngi

( 6enicillin$ &hich is prod%ced from a certain t*pe of f%ng%s helps %s to prod%ceantibiotics"

) Microorganisms s%ch as bacteria and vir%s pla* an important role in the preparation ofvaccines"

* Certain algae prod%ce beta carotene to prevent cancer

+ #acteria living in herbivores digestive s*stem secrete an en/*me called cell%lose &hichhelps to digest cell%lose"

, Nitrogen fixing bacteria helps to bind nitrogen from the atmosphere and convert it to

nitrate in the soil"H 9east acts on gl%cose sol%tion to prod%ce alcohol"

- #acteria is %sed to oxidi/e alcohol in ma0ing of vinegar

Microorganisms are also %sed in biological control

8ro%p the above statements into five categories

(ateory Statement

-a. ;ood digestion-i.…………………………………………………………………"

-b. (eca*ing process

-i.…………………………………………………………………"

-c. Medicine

-i. ………………………………………………………………""

-ii. ………………………………………………………………""

-iii. ………………………………………………………………"

-d. Agric%lt%re-i. ………………………………………………………………""

-ii. ………………………………………………………………""

-e. )nd%str*

-i. ………………………………………………………………""

-ii. ………………………………………………………………""

-iii. ………………………………………………………………"

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Score: …./ 10 x 100 = …….%


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Name: ………………………………………………… Class : ……Chapter 1Exercise <Learning Area: Microorganisms and Their Effects on Living ThingsLearning Obective: Anal*sing the harmf%l effects of microorganisms"

1" )dentif* the diseases ca%sed b* microorganisms from the cross &ord p%//le belo&"

M O T ) N E A 2 C E N ( O L

C E C A T ) ( M C 2 O L E 7 A

6 T A A ) 2 ! A 7 T ! N N O T

O ) N ) A # E T E E 8 N 7

L # M A L A 7 ) A L A M ! A O

) E 7 L = E C A N C E 7 E L

O A E 7 ) C 8 > 7 M 6 ; ( A

M ? 7 T 8 @ O L M > E ) )

9 A M 7 ) N 8 @ O 7 M ) ? N (

E T > M L ( A > 6 O A = E 2

L 8 A A T 7 ) C A 2 7 E 7 O 7

) # M ! M 6 9 ! 7 ) M 7 N O

T ( 9 # N T 9 6 2 ) L )

) 2 ( 9 E N T E 7 9 = ) O )

L A 2 E 6 A T ) T ) # T

(iseases ca%sed b* ,

i. ?ir%ses : ……………………………………………………………… -5 diseases.

ii. #acteria : ………………………………………………………………… -' diseases.

iii. ;%ngi :……………………………………………………………………" -' diseases.

iv. 6roto/oa: ………………………………………………………………… -' diseases.

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Score: …./ 1 x 100 = …….%


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Name: ……………………………………………… Class : ……Chapter 1Exercise Learning Area: Microorganisms and Their Effects on Living ThingsLearning Obective: Anal*sing &a*s to prevent infection ca%sed b* microorganisms"

1" t%d* the terms belo&"

Complete the follo&ing statements &ith the correct terms"

Statement erm

-a. 6rocess of inecting vaccine

-b. A process to 0ill microorganisms

-c. Chemicals %sed to 0ill or inhibit the gro&th of microorganismson the s0in

-d. 6rod%ced b* &hite blood cells to fight against the invadingantigens

-e. 2armf%l microorganisms ca%sing diseases"

-f. %bstance containing animal antibodies

-g. 6athogen or microbes in blood

-h. An agent that carries diseases

-i. %bstance containing &ea0ened pathogen

-. The abilit* of the bod* to resist pathogens infections

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?ector )mm%nit* terili/ation ?accine

?accination Antigen Antiseptics Antibod*

er%m 6athogen

Score: …./ 1 x 100 = …….%


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'" The follo&ing are steps ho& to prepare the ser%m from a horse"

-a. The bod* of the horse prod%ces antibodies for a partic%lar disease"

-b. The horse blood is centrif%ged to obtain the ser%m

-c. The horse is inected &ith microorganism of a partic%lar disease"

-d. The horseBs blood is extracted"

7earrange the steps above to sho& ho& to prepare the ser%m from a horse" -i. ………………………………………………………………………

-ii. ………………………………………………………………………

-iii. ………………………………………………………………………" -iv. ………………………………………………………………………"

+" The diagram belo& sho&s the t*pes of imm%nit*"

Name & : …………………………………" * : …………………………………

': …………………………………" + : …………………………………

(: …………………………………"" ,: …………………………………

): …………………………………"

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)mm%nit*

Active &

' (

Example: * Example:?accine

Nat%ral )

Example: + Example: ,


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Name: ……………………………………………… Class : ……Chapter 1Exercise 5Learning Area: Microorganisms and Their Effects on Living ThingsLearning Obective: !nderstanding ho& diseases ca%sed b* microorganisms are treated"

;ill in the blan0s &ith the correct ans&ers" Choose the &ord from the box given"

1" (%ring s%rger*$ the tiss%e or organ that is damaged or infected b* diseases is

……………………or…………………………………

'" Antibiotics given b* the doctor m%st be cons%med based on the allocated time and %antit*" This is

to ens%re that all the pathogens ca%sing the diseases are ……………" b* the antibiotic" Other&ise$

the s%rviving …………………"" &ill develop resistance to&ards the antibiotic" 2ence$ the same

………………………"" &ill not be able to c%re the same diseases in the f%t%re"

+" Example of diseases that can be c%red &ith antibiotics incl%de ……………"and ………………… Antibiotic

cannot be %sed to c%re diseases that are ca%sed b* ……………………"

chapter 1 microorganisms.doc

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