chapter 2

Chapter 2 Cell as a Basic Unit of Life

Paper 1

Each question is followed by four options. Choose the best answer for each question.

1 Who was the scientist that first observed cells under a microscope? A Hans Lippershey B Robert Hooke C Thomas Edison D Charles Darwin

2 Which structure is present in both plant and animal cells? I Nucleus II Cytoplasm III Cell wall IV Cell membrane

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

3

M, N, O and P above are steps that are required to prepare a slide of onion cells. Which is the correct sequence of steps?A N, P, O, M

B N, M, P, O C N, P, M, O D M, N, P, O

4 Which cell structure and function is correctly matched? Cell structure Cell function

A Nucleus Stores food B Vacuole Captures light energy

C Cell membrane Allows substances to pass into and out of the cell D Cell wall Transports water into the cell

© Pearson Malaysia Sdn Bhd 2007 Super Score Science Form 1

M – Cover onion with a glass coverN – Peel a layer of onionO – Absorb excess iodine with filter paperP – Add a drop of iodine solution

5 Which step is correct when using a light microscope? A Always use the coarse adjustor before the fine adjustor knobs

B Fresh specimens must remain wet on a slide C Adjust the mirror to allow the minimum amount of light to enter D Carry the microscope by the eyepiece lens

6 Which is a unicellular organism? I Hydra II Euglena III Yeast

IV Spirogyra A I and III only B II and III only C I, II and IV only D I, II, III and IV

Which organism below is most similar to the organism shown in the figure above? A Moss B Fungus C Bacterium D Paramecium

8 Which cells transports messages to all parts of the body? I Red blood cells II Nerve cells III Muscle cells IV Brain cells A II only B II and III only C I, II and IV only D I, II, III and IV


7

9

The information above describes two types of cells X and Y. Which of the following represents X and Y?

X Y A Sperm cells Testis

B Nerve cells Nervous system C Cardiac muscle Heart D Stomach cells Small intestine

10

What do M, N and O represent in the above?M N O

A Muscle Stomach Intestine systemB Heart Blood Blood circulatory systemC Intestine Lining Small intestine Digestive systemD Eye Brain Nervous system

11 Which is a part of the human endocrine system? I Pituitary II Thyroid III Pancreas IV Stomach A I and III only B II and IV only C I, II and III only D I, II, III and IV

12

Which human body system has the functions as described above? A The blood circulatory system B The nervous system C The muscular system D The skeletal system


X – A group of similar cells working together to carry out a specific function Y – Different types of tissues working together to carry out a specific function

Cell M N O Human

Supports the body Protects the organs Enables movement

13 Cell specialisation enables a person to do several things at the same time. Which of these actions may be carried out efficiently by a hockey player, at the same time?

I Using his eyes to detect the ball II Using his brain to decide if he can successfully tackle the player who has the

ball III Using his legs to run towards the ball IV Using his arms to position his stick to hit the ball A I and III only B II and IV only C I, II and III only D I, II, III and IV

14 Which specialised human body system helps you to quickly remove your hand from a knife, after accidentally cutting yourself?

A The skeletal system B The lymphatic system C The nervous system D The excretory system

15 What is an advantage of cell specialisation?I Several actions can be carried out at the same time

II The organism functions more efficiently III There is division of labour amongst cells IV Cells do not become overworked A I and III only B II and IV only C I, II and III only D I, II, III and IV


Paper 2

Answer all the questions.

Section A

The figure above shows a plant cell.

(a) Label the following parts on the figure above:

(b) What is the function of the following? (i) cell wall(ii) cell membrane

(iii) nucleus

(c) Give three properties of a plant cell to show how it differs from an animal cell.

Section B

2 The following figures show some human body cells.

(a) Name these cells:(i) L(ii) M

(iii) N(iv) O


cell wall cell membrane vacuole nucleus cytoplasm

1

L M N O

(b) What is the similarity between M and O?

(c) Give two differences between M and O.

(d) What type of tissue do L cell forms?

(e) Name the organ formed from the answer in 2(d).

(f) (i) Name the system formed from the answer in 2(e). (ii) What is the function of this system?

(g) Why are human beings considered as complex organisms?


chapter 2

Documents