CHAPTER 2:

CHAPTER 2:CELL STRUCTURE AND CELL ORGANISATION

Multiple Choice Questions

For Question 1 to 11, each question is followed by four alternative answer A, B, C or D. choose one correct answer for each question and blacken the corresponding space in your objective answer.2.1Cell Structure And Function

1. The following statements are about an organelle of a cell

What is the organelle?AEndoplasmic reticulum

BRibosome

CGolgi apparatus

DChloroplasts

2. Below is a list of cell structures.

Which two structures occur only in plant cells?

AW and X

BW and Z

CX and Y DX and Z

3.Diagram 2.1 shows the structure of a plant cell.

DIAGRAM 2.1

Which of the following is true about X, Y and Z?

A

B

C

D

4.Diagram 2.2 shows a typical plant cell.

DIAGRAM 2.2 Which of the following is true about the function of organelles X and Y?

Function of organelle X

Function of organelle Y

ATraps sunlight for photosynthesis Site for the synthesis of protein

BControl all activities in cell

Site for cellular respiration

CSite for cellular respiration

Traps sunlight for photosynthesis

DTraps sunlight for photosynthesis Site for cellular respiration

5.Diagram 2.3 shows a typical animal cell.

P= centrioles Q=ser

DIAGRAM 2.3

Which of the following is true about the function of organelles P and Q?

Function of organelle P

Function of organelle Q

A Form spindle fibres during cell division Site for synthesis of lipid

B Secretes enzyme for digestion

Site for synthesis of protein

C Site for synthesis of lipid

Secretes enzyme for digestion

D Site for synthesis of protein

Form spindle fibres during cell division

6.Which of these organelles are found in abundance in pancreatic cell?

ALysosomes, Endoplasmic reticulum and Golgi apparatus

BEndoplasmic reticulum and Golgi apparatus

CLysosomes and Golgi apparatus

D Golgi apparatus only

2.2Cell Organisation

7.Diagram 2.4 shows four different types of plant tissues W X Y Z. What are tissues W, X, Y and Z?

W X Y Z

DIAGRAM 2.4

A

B

C

D8.Diagram 2.5 shows three types of muscle tissues found in an animal. Which organs have tissue P, Q and R.

P Q R

DIAGRAM 2.5

A

B

C

D

9.Which of the following organs does not belong to the digestive system?

A B C D

10.What is the most abundant tissue found in the human body?

AMuscle tissue

BEpithelial tissue

CNerve tissue

DConnective tissue

11.Diagram 2.6 shows cell organization in a multicellular organism

DIAGRAM 2.6

Which of the following can be represented by X?

APalisade mesophyll

BLeaf

CXylem

DStoma

Structured Items2.1 Cell Structure And Function

Answer all questions. Write your answer in the spaces provided in the question paper.1.Table 2.1 shows the relationship between the density of certain organelles found in a specific cell.

Types of cellOrganelles found abundantly

Flight muscle cells in insects and birds. X

Pancreatic cellsY

Table 2.1

(a)

(i)Name organelles X and Y

Organelle X: Organelle Y : [2 mark]

(ii)State the function of each organelles found in each specific type of cell.

Function of organelle X :

Function of organelle Y :

: [2 mark]

Diagram 2.7 shows some cells from the stem of a plant seen in cross section.

DIAGRAM 2.7

(b)

(i)What type of tissue is shown at X?

[1 mark]

(ii)State two functions of this tissue.

[1 mark]

(iii)State one way in which the cells of tissue X are adapted to carry out one of

these function.

[1 mark] (c)

(i)In the space below, draw and label your diagram to show a mesophyll cell

from a leaf.

[3 marks]

(ii)How are mesophyll cells adapted to carry out their function?

[ 3 marks] 2.2Cell Organisation

2.Diagram 2.8(i) shows the liquid composition of the human body.

Diagram 2.8(i)

(a)(i)Based on Diagram 2(i), name fluids P,Q , and R

Fluid P:

Fluid Q:

Fluid R: [3 marks]

(ii)What is eventually formed from fluid P, Q and R

[1 mark] (b)Fluid Q exchange substances with P. Give two examples of these substances.

[2 marks]

Diagram 2.8(ii) shows the body temperature of a person before, during and after taking a cold bath at 220C.

Diagram 2.8(ii)

(c)For how long was the person in the bath?

[1 mark]

(d)Explain why the persons body temperature fell?

[2 marks]

(e)Explain how the blood capillaries help to increase the body temperature to normal.

[3 marks]Essay ItemsAnswer all questions

2.2Cell Organisation

1.Diagram1 shows the process in the synthesis and secretion of extracellular enzymes in an animal cell.

DIAGRAM 2.9

(a)Based on Diagram 2.9:

(i)explain the role of nucleus in the synthesis of enzyme [ 3 marks]

(ii)Name one extracellular enzymes and describe how the different cellular

components are involved in the secretion of this enzyme.

[10 marks]

b).

Using the information given, explain what will happen to a cell if particular cellular

components are absent.

[8 marks]Consists of a stack of flattened membranous sacs.

Found together is a system of associated vesicles of small sacs.

Centre for processing, packaging and transporting of carbohydrates, proteins, phospolipids and glycoproteins.

W cell membraneX cell wall

Y cytoplasmZ tonoplast

X

Z

Y

XYZSemi-permeable

Fully-permeable

Rigid

ElasticSemi-permeable

Semi-permeable

Semi-permeable

permeableFully-permeable

Semi-permeable

Semi-permeable

Fully-permeable

X

Y

ParenchymaSclerenchymaPhloemXylemXYZWWXyZWXZYZYXW

Tissue PTissue QTissue RintestineArms and legsheartArms and legsintestineheartinstestineheartArms and legsheartArms and legsintestine

Cell tissue X system organism

X

P

Q

R

In multicellular organisms, cell specialization allows for division among tissues, organs and systems to carry out their specific roles

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