Chapter 1

Question 1

What are all living things and organisms made up of?

Answer 1

Cells

Question 2

What is the smallest basic unit of life?

Answer 2

Cell

Question 3

How can the cells vary and depending on what?

Answer 3

Cells can vary greatly in shape and size depending on the function they perform.

Question 4

What is the cells size? Give an exeption if there’s any.

Answer 4

Most cells are very small far smaller than 1mm in diameter. The main exeption is ostrich’s egg which is considered to be the largest single cell.

Question 5

What is the largest single cell?

Answer 5

Ostrich’s egg

Question 6

All the cells are surrounds by a very thin membrane called?

Answer 6

Cell membrane

Question 7

What is the job of a cell membrane

Answer 7

1) It surrounds the cell’s cytoplasm, holding the cell together and giving it it’s shape
2) it protects and supports the cell
3) it controls the movement of substances into and out of the cell

Question 8

What is the cytoplasm?

Answer 8

It’s jellylike material that fills the cell

Question 9

What does a cytoplasm contain?

Answer 9

It contains many tiny sebcellular structures called organelles.

Question 10

What is the largest organelle in most of the cells?

Answer 10

Nucleus

Question 11

How can we refer to the nucleus and the cytoplasm together?

Answer 11

Protoplasm

Question 12

What is a protoplasm?

Answer 12

Both nucleus and cytoplasm together

Question 13

What is the other name for a cell membrane?

Answer 13

Plasma membrane

Question 14

Which of the following is selectively permeable?

1) cell membrane
2) cell wall

Answer 14

Cell membrane

Question 15

Why is the cell membrane considered selectively permeable?

Answer 15

Because it allows certain substances to pass through it
Ex: oxygen, water, and other nutrients.
And the cell’s waste products are allowed out.

Question 16

What is the job of the cell wall?

Answer 16

It protects the cells and provide them with extra support.

Question 17

What is the cell wall?

Answer 17

Its a thick and tough outer layer that protects the cell and provides it with extra support.

Question 18

Which of the following is considered fully permeable?

1) Cell wall
2) cell membrane

Answer 18

Cell wall

Question 19

Where does a cytoplasm take place?

Answer 19

It fills the empty space inside the cells

Question 20

What does a cytoplasm consist of?

Answer 20

Water
 Salt
Sugar
Enzymes 
Lipids
Proteins
And other substances

Question 21

What can the lipids and proteins inside the cytoplasm be used for?

Answer 21

Building the cell structure such as membrane

Question 22

What is the enzymes inside the cytoplasm responsible for?

Answer 22

It controls metabolic reactions inside the cells

Question 23

The nucleus is surrounded by lipid bilayer membrane called?

Answer 23

Nuclear envelope

Question 24

What is the job of the nuclear envelope?

Answer 24

It controls the exchange of substance between the nucleus and the cytoplasm through a very small openings called nuclear pores.

Question 25

The nucleus contains threadlike structures called?

Answer 25

Chromosomes

Question 26

What are chromosomes made up of?

Answer 26

DNA and some proteins

Question 27

What is the job of chromosomes?

Answer 27

They carry most of the cell's genetic material.

Question 28

What is the job of the nucleus?

Answer 28

1) It serves as the information and control centre of each cell. 2) it determines the cell type and controls much of the cells behaviour. 3) it controls the type and quantity of proteins produced by the cell (ex: enzymes) and regulate the reaction that happens in it. 4) it controls the cell division

Question 29

A cell can't reproduce only if?

Answer 29

It doesn't have a nucleus