Membranes

Question 1

The cell’s cytoplasmic membrane is also known as the __ __

Answer 1

plasme membrane

Question 2

Part (a) of the cell’s cytoplasmic membrane (plasma membrane) include:

Answer 2

• Separation of interior of cell to exterior of cell

Question 3

Part (b) of the cell’s cytoplasmic membrane (plasma membrane) include:

Answer 3

• Interactions with other cells and exterior molecules

Question 4

Part (c) of the cell’s cytoplasmic membrane (plasma membrane) include:

Answer 4

• Accumulation of cell nutrients; energy transduction; signal transduction

Question 5

Part (d) of the cell’s cytoplasmic membrane (plasma membrane) include:

Answer 5

• Exclusion of toxic molecules and ions

Question 6

Part (e) of the cell’s cytoplasmic membrane (plasma membrane) include:

Answer 6

• Cell locomotion; cell division

Question 7

___ produced by amphipathic lipid molecules, such as fatty acids, interacting with water.

Answer 7

Monolayers

Question 8

__ spherical lipid aggregates which have the long hydrophobic chains in the center and the charged carboxyl groups on the outside.

Answer 8

Micelles

Question 9

__ produced spontaneously by lipids such as glycerophospholipids

Answer 9

Bilayers

Question 10

___ naturally occurring spherical bilayer structures; can consist of multiple bilayers

Answer 10

vesicles

Question 11

___ artificially prepared vesicles; used in laboratory experiments

Answer 11

liposomes

Question 12

What are the two subunits of bilayers?

Answer 12

vesicles & liposomes

Question 13

What is a subunit of monolayers?

Answer 13

micelles

Question 14

___ are composed of hydrophobic and hydrophilic components

Answer 14

Micelles

Question 15

Inside out micelles have the ___ on the outside

Answer 15

tails

Question 16

Normal micelles have the ___ on the outside

Answer 16

heads

Question 17

Monolayers are single layered with the ___ facing the air

Answer 17

tails

Question 18

Bilayers have the __ facing the air

Answer 18

heads

Question 19

The fluid mosaic model of membrane structure considers that the __ __ is a fluid supporting matrix for membrane proteins

Answer 19

lipid bilayer

Question 20

Biological membranes are __ __, and both lipids and proteins are capable of __ within the bilayer

Answer 20

dynamic structures, movement

Question 21

What are the two classes of membrane proteins?

Answer 21

Integral membrane proteins
Peripheral membrane proteins

Question 22

What are integral membrane proteins also known as?

Answer 22

Intrinsic proteins

Question 23

What are peripheral membrane proteins also known as?

Answer 23

Extrinsic proteins

Question 24

Integral membrane proteins ____

Answer 24

extend into or through the lipid bilayer

Question 25

Peripheral membrane proteins ___

Answer 25

external to the lipid bilayer

Question 26

The ___ ___ is a fluid supporting matrix for membrane proteins

Answer 26

lipid bilayer

Question 27

The ___ ___ of the bilayer is a barrier that separates one side of the membrane from another

Answer 27

hydrophobic interior

Question 28

Membranes consist of a variety of ___

Answer 28

lipids, membrane proteins, and carbohydrates

Question 29

Membranes are ___, ___ structures

Answer 29

complex, dynamic

Question 30

What are the three groups of membrane?

Answer 30

1. Lipids 2. Proteins 3. Carbohydrates

Question 31

Glycerophospholipids, cholesterol, and other lipids are examples of ____

Answer 31

lipids

Question 32

Integral (a-helix proteins & B-barrel proteins), peripheral are examples of ____

Answer 32

proteins

Question 33

Glycoproteins and glycolipids are examples of ___

Answer 33

carbohydrates

Question 34

Are a-helical proteins or B-barrel proteins more common?

Answer 34

a-helical proteins

Question 35

Integral proteins go ___ the protein

Answer 35

through

Question 36

Peripheral proteins do not go on the ___ of a protein

Answer 36

outside

Question 37

Integral proteins are contained within the ___ ____.

Answer 37

lipid bilayer

Question 38

Integral proteins are attached to the _____ by only a small ___ ____

Answer 38

membrane, hydrophobic segment

Question 39

Integral proteins:

Answer 39

a) contained within the lipid bilayer b) attached to the membrane by only a small hydrophobic segment

Question 40

Peripheral proteins are loosely associated with the ___ of the membrane.

Answer 40

outside

Question 41

Peripheral proteins __ to the membrane through __ ___ interactions with integral proteins

Answer 41

bind, non-covalent

Question 42

What are examples of non-covalent interactions in peripheral proteins?

Answer 42

hydrophobic, ionic, hydrogen-bonding

Question 43

Lipid-anchored proteins are ___ ____ (integral or peripheral)

Answer 43

membrane proteins

Question 44

Lipid-anchored proteins are __ ___ to lipid molecules in the membrane

Answer 44

covalently linked

Question 45

Lipid-anchored proteins include proteins bound to fatty acids such as __ __ and ___ ____

Answer 45

myristic acid and palmitic acid

Question 46

What are two examples of integral membrane proteins?

Answer 46

a-helix protein B-barrel protein

Question 47

Carbohydrates in integral membrane proteins are ___ ___ for the MN blood group system

Answer 47

antigenic determinants

Question 48

The ABO blood group system is due to ____ ____ to membrane sphingolipids (glycolipids).

Answer 48

carbohydrates attached

Question 49

Blood group systems are due to ___ on the surface of red blood cells.

Answer 49

antigens

Question 50

____ are typically the antigens on the surface of red blood cells. However, ___ can be antigens.

Answer 50

Carbohydrates, proteins

Question 51

There are __ types of blood group systems

Answer 51

36

Question 52

In ABO blood group system, carbohydrates are attached to the membrane _____

Answer 52

sphingolipids (glycolipids)

Question 53

Some membranes proteins are anchored to ___ ___ by covalent attached to ___ that are inserted into the membrane lipid bilayer.

Answer 53

biological membranes, lipids