Cell Structure

Question 1

Does the cytoplasm or the cytosol include organelles?

Answer 1

cytoplasm

Question 2

How does the selective gatekeeping process happen in the plasma membrane?

Answer 2

by special proteins embedded in the membrane

Question 3

How does the natural selective barrier arise in the membrane?

Answer 3

the phospholipid bilayer

Question 4

In the phospholipid bilayer the lipids are amphipathic, what does that mean?

Answer 4

hydrophilic head and hydrophobic tail

Question 5

What is an integral protein

Answer 5

sticks out into the ecf and interacts with hydrophobic tails

Question 6

What is a transmembrane protein?

Answer 6

go through the whole membrane

Question 7

Peripheral Protein

Answer 7

inside the cell in the iCF and interacts with hydrophilic head groups

Question 8

What role does cholesterol play in the membrane

Answer 8

it keeps the lipids packed together in the right amount, so not too loose and not too light