Bio Test

Question 1

What is the main function of the cell membrane

Answer 1

Regulates what enters and leaves the cell

Question 2

What is the main function of the cell wall

Answer 2

To provide support and protection for the cell

Question 3

What happens during diffusion

Answer 3

Particles move from an area where they are more concentrated to an area where they are less concentrated

Question 4

What is osmosis

Answer 4

The diffusion of water through a selectively permeable membrane

Question 5

The core of nearly all cell membranes is a double layered sheet called a

Answer 5

Lipid bilayer

Question 6

What is the function of the proteins attached to a cell membrane

Answer 6

Proteins form channels and pumps that help move material across the cell membrane

Question 7

What is the function of the carbohydrates attached to a cell membrane

Answer 7

Act like chemical identification cards, allowing individual cells to identify one another

Question 8

In what organisms are cell walls found

Answer 8

Plants, algae, fungi

Question 9

The cell wall lies inside the cell membrane

Answer 9

False

Question 10

What are plant cell walls mostly made of

Answer 10

Cellulose, a tough carbohydrate fiber

Question 11

What is the concentration of a solution

Answer 11

The mass of solute in a given volume of solution, or mass/volume

Question 12

What is meant when a system has reached equilibrium

Answer 12

The concentration of the solute is the same throughout a system

Question 13

What does it mean that biological membranes are selectively permeable

Answer 13

That some substances can pass across them and others can’t

Question 14

Two solutions are isotonic

Answer 14

The solutions are the same strength

Question 15

A solution is hypertonic

Answer 15

The solution is above strength in solute

Question 16

A solution is hypotonic

Answer 16

The solution is below strath in solute

Question 17

On which side of a selectively permeable membrane does osmosis exert a pressure

Answer 17

On the hypertonic side

Question 18

What happens during the process of facilitated diffusion

Answer 18

Molecules, such as glucose, that cannot diffuse across the cell membrane’s lipid bilayer on their own move through protein channels instead

Question 19

Facilitated diffusion does not require the cell to use energy

Answer 19

True

Question 20

The energy requiring process that moves the material across a cell membrane against a concentration difference is called

Answer 20

Active transport

Question 21

Active transport always requires transport proteins during the process

Answer 21

True

Question 22

The process of taking material into the cell by means of infoldings, or pockets, of the cell membrane. The pocket that results breaks loose from the other portion of the cell membrane and forms a vacuole

Answer 22

Endocytosis

Question 23

“Cell eating” Extensions of cytoplasm surround a particle and package it within a food vacuole. The cell then engulfs it.

Answer 23

Phagocytosis

Question 24

Cells releasing large amounts of material from the cell, the membrane of the vacuole surrounding the material fuses with the cell membrane, forcing the contents out of the cell

Answer 24

Exocytosis

Question 25

During endocytosis what happens to the pocket in the cell membrane when it breaks loose from the membrane

Answer 25

Forms a vacuole within the cytoplasm