plasma membrane structure

Question 1

phospholipid bilayer

Answer 1

two layer of phospholipids form the phospholipid bilayer of the plasma membrane

Question 2

carrier proteins

Answer 2

a membrane protein that undergoes conformational change to transport molecules across a membrane

Question 3

channel proteins

Answer 3

a transmembrane protein pore in a phospholipid bilayer that selectively enables transport of large or polar molecules

Question 4

cholesterol

Answer 4

gives stability to the membrane and reduces the permeability of the membrane to small water-soluble molecules

Question 5

transmembrane proteins

Answer 5

integral proteins that span both phospholipid layers

Question 6

carbohydrates

Answer 6

aids with cell-to-cell communication, signalling, and recognition of self or non-self molecules. they are usually in chains outside the cell

Question 7

phospholipid

Answer 7

the main molecule of which membranes are composed have a phosphate head (hydrophilic) and 2 fatty acid tails (hydrophobic)

Question 8

glycolipid

Answer 8

a phospholipid bound to a carbohydrate

Question 9

glycoprotein

Answer 9

a protein bound to a carbohydrate

Question 10

integral proteins

Answer 10

permanent part of membrane

Question 11

peripheral proteins

Answer 11

temporary part of the membrane, bind to integral proteins or penetrate surface

Question 12

molecules found in the plasma membrane

Answer 12

Phospholipids, glycoproteins, glycolipids, proteins, and cholesterol