Cell Structure And Function

Question 1

All organic compounds contain the element…..

Answer 1

Carbon.

Question 2

Why is water important for a cell?

Answer 2

Most chemical reactions in cells require water.

Question 3

The cell membrane and water are both involved in….

Answer 3

The movement of materials into and out of the cell

Question 4

What term refers to the movement of molecules from an area of higher concentration to an area of lower concentration?

Answer 4

Diffusion.

Question 5

Which term refers to the diffusion of water molecules through a selectively permeable membrane?

Answer 5

Osmosis

Question 6

Which term refers to the movement of materials through a cell membrane without using the cell’s energy?

Answer 6

Passive transport.

Question 7

Which term refers to the movement of materials through a cell membrane when the cell’s energy is required?

Answer 7

Active transport.

Question 8

Enzymes are important because they…

Answer 8

Speed up chemical reactions.

Question 9

Sugar molecules can combine with one another to form large molecules called….

Answer 9

Starches.

Question 10

A substance that cannot be broken down into simpler element is a (n)…..

Answer 10

Element

Question 11

When two or more elements combine chemically, they form a(n)…..

Answer 11

Compound

Question 12

T or F:

Organelles that use energy from sunlight to produce food are called mitochondria.

Answer 12

False.

They make food but not with sunlight. Chloroplast makes food in plants and require sunlight.

Question 13

T or F:

Plant and animal cells usually are larger than bacterial cells.

Answer 13

True.

Question 14

T or F:

Water helps keep temperature of cells from changing rapidly.

Answer 14

True.

Question 15

T or F:
In passive transport materials move from an area of higher concentration to an area of lower concentration through a cell membrane.

Answer 15

True

Question 16

T or F:

The cells in many-celled organisms often have different shapes and sizes.

Answer 16

True.

Question 17

Sugars and scratches are examples of organic compounds known as ….. .

Answer 17

Carbohydrates

Question 18

DNA and RNA belong to the group of organic compounds known as ….. .

Answer 18

Nucleic acids.

Question 19

Oxygen molecules move across cell membranes through a process called …….

Answer 19

Diffusion

Question 20

The diffusion of ……. molecules through a selectively permeable membrane is called osmosis.

Answer 20

Water.

Question 21

Small molecules called …… make up proteins.

Answer 21

Animo acids.

Question 22

Since carbon cannot be broken down into simpler substances, it is an example of an …… .

Answer 22

Element.