Cell membrane structure and function

Question 1

Organelles are always surrounded by many membranes

Answer 1

False (One or more membrane)

Question 2

Almost all cellular processes involve intracellular membranes

Answer 2

True

Question 3

The structure of the cell membrane is best described through a ?

Answer 3

Fluid mosaic model

Question 4

This model thus proposes that the cell membrane is made up of two main layers, what are the two layers?

Answer 4

Lipids and proteins

Question 5

Phospholipid make up blank of the lipid component of the cell surface membrane.

Answer 5

75%

Question 6

Makes up 20% of animal membrane and is rarely found in plants

Answer 6

Cholesterol

Question 7

Three types of membrane proteins

Answer 7

Transmembrane protein
Integral protein
Peripheral protein

Question 8

Comprise 5% of membrane lipids

Answer 8

Glycolipids

Question 9

Types of membranes protein base on their functions

Answer 9

Transport proteins
Receptor proteins

Question 10

Are those embedded in the lipid bilayer

Answer 10

Transmembrane protein

Question 11

Trigger cellular responses when specific molecules in the extracellular fluid, such as hormones or nutrients, bind to them

Answer 11

Receptor proteins

Question 12

Two examples of transport protein

Answer 12

Channel protein
carrier protein

Question 13

Are those associated outside the lipid bilayer

Answer 13

Peripheral protein

Question 14

Recognition proteins are mostly blank

Answer 14

Glycoproteins

Question 15

A type of Transport proteins that Have binding sites that can temporarily attach to specific molecules on one side of the membrane, it changes it shaper and moves the molecules across the membrane

Answer 15

Carrier proteins

Question 16

Are those floating within the lipid bilayer

Answer 16

Integral proteins

Question 17

Two general mechanism of transport

Answer 17

Passive and active transport

Question 18

a type of transport protein that allow small water-soluble to pass through the membrane forming pores or channels.

Answer 18

Channel proteins

Question 19

Is the ability of a surrounding solution to cause a cell to gain or lose water.

Answer 19

Tonicity

Question 20

type of proteins that Control the movement of hydrophilic molecules through the plasma membrane.

Answer 20

Transport protein

Question 21

Solute concentration is greater than that inside of the cell; cell loses water

Answer 21

Hypertonic solution

Question 22

Uses cellular energy to move substances into or out of the cell.

Answer 22

Active transport

Question 23

Solute concentration is less than that inside the cell ; cell gains water

Answer 23

Hypotonic solution

Question 24

Solute concentration is the same as that inside the cell; no net water movement across the plasma membrane

Answer 24

Isotonic solution

Question 25

Is the movement of substances into or out of cells down concentration gradients requiring no expenditure of energy.

Answer 25

Passive transport

Question 26

Have short carbohydrate ,molecule that are attached to them

Answer 26

Glycoproteins