T1 BAB 2

Cell as A Unit of Life 1

The diagram shows a plant cell. Which of the structures A, B, C or D maintains the shape of the plant cell?

PMR 2004 2

The diagram shows a plant cell.

Which of the following structures A, B, C or D controls the activity of the cell? PMR 2005 3

Which of the following is a multicellular organism? A

B

C

D

PMR 2006

4

Diagram 1 shows a type of tissue in the human body.

Diagram 1 The tissue is A B C D

nerve tissue muscle tissue epithelial tissue connective tissue PMR 2006

5

Diagram 1 shows four types of microorganisms.

Diagram 1 Which of the following are unicellular microorganisms? A B C D

Amoeba, Paramecium, Spirogyra Spirogyra, Amoeba, Chlamydomonas Chlamydomonas, Amoeba, Paramecium Paramecium, Spirogyra, Chlamydomonas PMR 2007

6

The following statements about an animal cell. •

•

The smallest cell in human body

Can move by itself

Which of the following cells is described by the statements? A B C D

Ovum cell Sperm cell Red blood cell White blood cell PMR 2007

7

Diagram 2 shows the classification of organism.

Diagram 2 Which of the following are true about X and Y? A B C D

X Unicellular Multicellular Have a cilia Have no cilia

Y Multicellular Unicellular Have no cilia Have a cilia PMR 2008

8

Which cell builds up tissue?

PMR 2008

1

Figure 1 shows cells K and L. (PMR 2004)

Q: ______________________

Cell K : …………………………………..

Cell L : ………………………………… Figure 1

(a) Name cells K and L in the spaces provided in Figure 1.

(2 marks)

(b) Q controls all cell activities. Label Q in Figure 1.

(1 mark)

(c) Based on the structures R or S in cell L, complete Table 1. Name of structure

Function of structure

Table 1 (2 marks)

2

Figure 2 shows a plant cell. (PMR 2005)

FIGURE 2

Figure 2 (a) On Figure 2, label structures P, Q and R using the following words: Nucleus

Cell wall

Chloroplast (3 marks)

(b) Draw lines to show the correct match between the structures and their functions. Draw the lines as shown below. Structure

Function

Regulates movement of substances in and out of the cell

the

P Protects and maintains the shape of the cell Q Controls all the activities of the cell R

Carries out photosynthesis

(2 marks)

3

Diagram 3 shows four types of cells, J, K, L and M which are found in living organisms. (PMR 2006)

J

K

L

M Diagram 3

(a) Observe the cells in Diagram 3. Based on your observations, state one characteristic of each cells J, K, L and M. J : ………………………………………………………………………………………………… K : ………………………………………………………………………………………………… L : ………………………………………………………………………………………………… M : ………………………………………………………………………………………………… (4 marks)

(b) Classify cells J, K, L and M in diagram below into two groups based on their common characteristics. Write the letters of the cells belonging to each group.

J, K, L, M

Group 1

Group 2

Common characteristics

Letters of the cells

(4 marks)

4

(a) i. Diagram 1 shows some examples of the organization of cells in the human body. Which of the following is an organ? (PMR 2007) Tick ( √ ) in the box provided.

Diagram 1 (1 mark) ii. Circle the words in the box below to show two other examples of organs.

ovum

muscle

nose

lungs

(2 marks)

(b) Draw lines to match each type of cell with its function. Cell

Function Carries oxygen to all part of the body

Sends information in the body

Destroys bacteria

Involved in reproduction

(3 marks)

Answers Paper 1 1. D

2. A

3. D

4. C

5. B

6. C

7. A

8. C

Paper 2 1. a. K: Animal cell L: Plant cell b. Nucleus c. Name of structure R: cell wall S: chloroplast

2. a.

Function of structure Gives a cell a fixed shape Contains chlorophyll for photosynthesis

P: cell wall Q: chloroplast R: nucleus

b. Structure

Function

Regulates movement of substances in and out of the cell

the

P Protects and maintains the shape of the cell Q Controls all the activities of the cell R

Carries out photosynthesis

3.

a. J: it has no cell wall K: it has a cell wall L: it has no cell wall M: it has no cell wall b. Group 1: Has a cell wall – K Group 2: Has no cell wall – J, L, M 4

(a) i.

√

ii. nose and lungs

(b) Cell

Function Carries oxygen to all part of the body

Sends information in the body

Destroys bacteria

Involved in reproduction

(3 marks)