Cell Membrane Parts

Question 1

What are the 3 types of proteins in the fluid mosaic?

Answer 1

glycoprotein, integral proteins and peripheral proteins

Question 2

Define amphipathic

Answer 2

both non-polar and polar

Question 3

What are the 2 similarities between phospholipids and cholesterol?

Answer 3

• both amphipathic molecules
  both lipids

Question 4

What are peripheral proteins?

Answer 4

not in lipid bilayer; loosely attached on either side of the cell
hydrophilic w/ charged and polar side groups

Question 5

What are the two types of integral proteins?

Answer 5

Non-transmembrane and transmembrane

Question 6

Define nontransmembrane integral protein

Answer 6

halfway through the membrane

Question 7

Define transmembrane protein

Answer 7

goes through the entire membrane

Question 8

What are the two types of transmembrane proteins?

Answer 8

Channel proteins and protein pumps

Question 9

Identify the nature of a channel protein

Answer 9

It is polar in the inside and all ions go through the channels. Each channel is specific to an ion
allows water to pass

Question 10

Identify the nature of a carrier protein

Answer 10

It is for big polar molecules

Question 11

What are glycoproteins?

Answer 11

oligosaccharides + protein
they are cell surface receptors

Question 12

Describe cholesterol

Answer 12

It is an amphitpathic molecules and maintains fluidity and rigidity when too hot or cold.
not in plant cells embranes

Question 13

Describe the function of the Extracellular matrix

Answer 13

It recieves signals and is an extra level of support

Question 14

what is fibronectin?

Answer 14

it is bonded to proteins

Question 15

What is the proteoglycan complex?

Answer 15

they are green lines that are polysaccharides,, they have branches like pine trees
they are core proteins

Question 16

How does the plasma membrane benefit the cell?

Answer 16

By being able to control the transport of materials in and out of the cell

Question 17

What is the nature of a integral proteins?

Answer 17

hydrophilic w/ charged protein and side groups on the ends
hydrophobic with non-polar side group expose to the outside

Question 18

What are the membrane proteins functions?

Answer 18

1.Transport
2. cell to cell recognition
3. enzymatic activity,
4. signal transduction,
5. intercellular joining,
6. attachment for Extracellular matrix of cytoskeletom

Question 19

What is an example of a membrane protein that does transport?

Answer 19

Protein channel

Question 20

What is an example of a membrane protein that does cell to cell recognition

Answer 20

glycoprotein (glycolipids do this too)

Question 21

What is an example of a membrane protein that does enzymatic activity?

Answer 21

peripheral protein

Question 22

What is an example of a membrane protein that does signal transduction?

Answer 22

fibronectin

Question 23

What is an example of a membrane protein that does intercellular joining ?

Answer 23

transmembrane protein

Question 24

What is an example of a membrane protein that does attachment for Extracellular matrix or cytoskeleton?

Answer 24

peripheral proteins?

Question 25

What are the two functions for the cell wall?

Answer 25

Structural Boundary
Permeable barrier

Question 26

what is the structural Boundary functions the cell wall does?

Answer 26

protects and maintains shape of the cell
prevents against cellular rupture when internal water pressure is high
helps plants stand

Question 27

What is the permeable barrier functions the cell wall does?

Answer 27

Plasmodesmata: small holes b.w plant cell- waste, water and ions

Question 28

What is the cell wall in fungi, plants and prokaryotes made out of?

Answer 28

Fungi- chitin
plants- cellulose
prokaryotes- peptidoglycan