ch1 microorganisms q&a

7/30/2019 Ch1 Microorganisms Q&A

1/10

i

Chapter 1: Microorganism

Section A

Instructions:Every question is followed by four optionsA, B, C and D.Choose

thecorrect answer.

1.

Diagram 1

The reddish patches in Diagram 1 is a skin disease. This disease could bedue to

A. microorganism inflection.

B. dogs bite

C. cats bite

D. snakes bite

2. All of the following are microorganisms exceptA. bacteria B. fungi C. protozoa D. balsam

3.

Diagram 2

1


2/10

From Diagram 2 above, we can conclude that

A. the microorganism is bigger than the human cheek cell.

B. the microorganism is smaller than the human cheek cell

C. both cells are equal.

D. the human cheek cell is half the size of the microorganism.

4.

Diagram 3

What happens to the paper after a few hours?

A. The dough absorbs the paper.

B. The paper absorbs the dough.

C. The dough has expanded in such a way that the paper is hidden

underneath it.

D. The dough has swallowed the paper.

5. Microorganisms undergo the following processes exceptA. breathe

A. grow

B. think

C. move

6. Which of the following cannot be seen through the naked eye?

A. fish scale

B. sweat pore of a human

C. bacteria

D. fine hair on a human body

7. What are needed to make bread?

I Flour III Water

II Sugar IV Yeast A I and II only

B II and IV only

C I, II and III only D I, II, III, and IV

8. Which of the following is not involved in the making of food?

A. Making bread

2


3/10

B. Making tapai

C. Making tempe

D. Making fertilizer

Questions 9 & 10 are based on Diagram 4.

Diagram 4

9. If Raju consumes the milk in Diagram 4 on the 14 th of October 2006, themilk will

A taste sour B taste sweeter

C taste salty

D taste bitter

10. The change of taste of milk in question (9) is due to the harmful effect of

A. bacteria

B. fungus

C. sugarD. milk

11. Which of the following is matched wrongly?

Disease caused bymicroorganisms

Microorganisminvolved

I. AIDS

B. Mumps

C. Tooth decay

D. Scabies

VirusVirus

Bacteria

Bacteria

12. Why must a patient with conjunctivitis be quarantined?

A. The microorganism can spread from one person to another.

3

Use

before

12.10.06


4/10

B. A patient with conjunctivitis can become mad.

C. The patient does not want to be disturbed.

D. Conjunctivitis is a viral disease.

13. All of the following are methods of prevention of diseases from spreading

exceptA. by washing our hands before handling food.

B. by covering our wounds.

C. by washing our hands after using the toilet.

D. by drinking water from the tap directly.

14. Which of the following patients should be quarantined?

1 Patients with mumps

II Patients with conjunctivitis

III Patients with chicken pox

IV Patients with stomach upset

A. Iand II onlyB. IIand III only

C. I, II and IIIonly

D. I, II, III and IV

15.

Diagram 5

The microorganism shown in Diagram 5 is undergoing the process of

A. reproduction

B. excretion of waste productX

C. respiration

D. taking in foodX

Questions 16 & 17 are based on Diagram 6.

Diagram 6

16. What is the use of the microorganism shown in Diagram 6?

4


5/10

A. It is useful in the making of bread.

B. It is useful in the decaying of dead organic matter.

C. It is useful in the making of fertilizer.

D. It is useful in the rotting of bread.

17. The microorganism in Diagram 6 isA. mucor

B. bacteria

C. yeast

D. amoeba

18.

Diagram 7

What is similar of the microorganisms shown is Diagram 7?

A. Both microorganisms are bacteria

B. Both microorganisms are fungi

C. Both microorganisms are protozoa

D. Both microorganisms are viruses

19.

P Q R S

Diagram 8

Which of the above living things in Diagram 8 is not a microorganism?

1. P

B. QC. R

D. S

5


6/10

20. All the microorganisms below are found in the pond waterexceptA. Amoeba

B. Paramecium

C. Euglena

D. Mucor

6


7/10

Section B

Instructions : Write your answers in the space provided.

1.

Diagram 1

Diagram 1 shows 3 glasses of the same size containing 100 ml of fresh milkP, Q,R kept

in 3 types of condition overnight.

(a) What is the aim of this experiment?

___________________________________________________________________

___________________________________________________________________

(1 mark )

(b) What is your observation?

__________________________________________________________________

__________________________________________________________________

(1 mark )

(c) In this experiment, state the thing that is

(i) changed:_________________________________________________

(ii) observed: _________________________________________________

(iii) kept the same: _________________________________________

(1

mark)

(d) What can you conclude from the experiment?

_________________________________________________________________

_________________________________________________________________

( 1 mark)

7


8/10

2.

Diagram 2

Diagram 2 shows two slices of bread,Pand Q of the same type and size.Pis kept drywhile Q is kept moist with sprinkles of water. Both are wrapped in plastic bags for 5

days.

(a) What is the aim of the experiment?__________________________________________________________________

__________________________________________________________________(1 mark)

(b) State the thing that is

(i) changed:_________________________________________________

(ii) kept the same:____________________________________________________

(1 mark)

(c) What can you observe after 5 days?

_________________________________________________________________

(1 mark)

(d) (i) What is your conclusion?

_________________________________________________________________

(1 mark)

(ii) What is the microorganism involved in the rotting of the bread?

_________________________________________________________________(1 mark)

8


9/10

9


10/10

iChapter 1: Microorganism

A. Answers

Section A

1 A 2 D 3 B 4 C 5 C 6 C 7 D 8 D 9 A 10 A

11 D 12 A 13 D 14 C 15 D 16 A 17 C 18 B 19 D 20 D

Section B

1 (a) To show that microorganisms can cause milk to turn bad except when kept in arefrigerator.

(b) In the end, milkPand Q will turn bad while milkR remains fresh. (c) (i) changed : condition of the place where the milk is kept

(ii) observed : condition of the milk after being left overnight

(iii) kept the same : glasses of the same size / same amount of milk (d) Milk should be kept in a refrigerator to ensure from becoming bad due to the

harmful effect of microorganism found in the air

2 (a) To show that moist bread gets mouldy faster.

(b) (i) changed: condition of the bread

(ii) kept the same : same type and same size of bread (c) The moist bread Q gets mouldy first.

(d) (i) Moist bread gets mouldy faster.

(ii) Fungus

ch1 microorganisms q&a

Documents