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Flashcards in Cell Structure And Function Deck (22):
1

All organic compounds contain the element.....

Carbon.

2

Why is water important for a cell?

Most chemical reactions in cells require water.

3

The cell membrane and water are both involved in....

The movement of materials into and out of the cell

4

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

Diffusion.

5

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

Osmosis

6

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

Passive transport.

7

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

Active transport.

8

Enzymes are important because they...

Speed up chemical reactions.

9

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

Starches.

10

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

Element

11

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

Compound

12

T or F:
Organelles that use energy from sunlight to produce food are called mitochondria.

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

13

T or F:
Plant and animal cells usually are larger than bacterial cells.

True.

14

T or F:
Water helps keep temperature of cells from changing rapidly.

True.

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.

True

16

T or F:
The cells in many-celled organisms often have different shapes and sizes.

True.

17

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

Carbohydrates

18

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

Nucleic acids.

19

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

Diffusion

20

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

Water.

21

Small molecules called ...... make up proteins.

Animo acids.

22

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

Element.