Biology: Chapter 2

Question 1

Characteristics of Ribosomes

Answer 1

• tiny structure in the cell (seen with electron microscope)
• proteins are formed using instruction from DNA

Question 2

What is the function of nuclues?

Answer 2

-contains genetic materials
- controls the cell’s activity
- determines what protein is made in cell

Question 3

What is the looks and function of cytoplasm?

Answer 3

-clear jelly
-contains dissolved substances
-place where metabolic reaction happens

Question 4

What is the function of Mitochondria? What does it produce?

Answer 4

• site for aerobic reactions
• how energy is released from glucose
• produces oxygen

Question 5

What is the function of Ribosomes?

Answer 5

-site for protein synthesis using instruction from DNA

Question 6

What is plant’s cell wall made out of? what is its fuction?

Answer 6

Cellulose,
Cell wall is
-strong layer
-which protects and support the cell, preventing it from bursting when it has too much water

Question 7

What is the function of vacuole?

Answer 7

-cell sap which stores water
- presses outwards on the cell to keep its shape

Question 8

What is the function of Chloroplast?

Answer 8

• absorbs energy from sunlight and is used to make food by photosynthesis

Question 9

What is the function of cell membrane?

Answer 9

• controls what enters and leaves the cell

Question 10

What cell moves dust particles out of the body? Where is it found?

Answer 10

Ciliated cell, found in trachea and the lining of bronchi

Question 11

What cell is found in the leaves of a flowering plant? What does it do?

Answer 11

Palisade Mesophyll Cell, carries out photosynthesis

Question 12

Describe the structure and function of Red Blood Cell

Answer 12

-has no nucleus
- transport oxygen

Question 13

How many micrometer is 1 mm?

Answer 13

1000 micrometer = 1 mm

Question 14

Define the term tissue

Answer 14

a group of cells that work together to perform a particular function

Question 15

Where can you find root hair cell? what is its function?

Answer 15

• near the tips of the roots of flowering plant
• obsorbs water and mineral ions

Question 16

Function of neurone

Answer 16

conducts electrical impluses

Question 17

What are the 2 cell that is used for male and female gametes in sexual reproduction?

Answer 17

sperm cell -testes
egg cell- ovaries

Question 18

List the 6 structure of a bacteria cell

Answer 18

Circular DNA, Cell wall, Cell membrane, Plasmid, Ribosomes, Cytoplasm

Question 19

What are plasmids?

Answer 19

• small circular molecules of DNA

Question 20

Define Organ

Answer 20

A group of tissue that workds together to perform a particular function

Question 21

Define Organ system

Answer 21

Several organs that work together to perform a particular function

Question 22

How to find magnification?

Answer 22

magnification = size of image/ size of actual object
M= I/A

Question 23

What is bacteria?

Answer 23

• unicellular organism
• doesn’t contain a nucleus