cell membrane structure

Question 1

phospholipids

Answer 1

the main molecule of which membranes are composed of. They have a phosphate head and two fatty acid tails

Question 2

phospholipid bilayer

Answer 2

2 layers of phospholipid that make up the cell membrane

Question 3

fluid mosaic model

Answer 3

fluid means the phospholipid can move around freely without breaking
mosaic means the proteins are scattered amongst the phospholipids

Question 4

phosphate head

Answer 4

hydrophilic (water loving)

Question 5

fatty acid tails

Answer 5

hydrophobic (water-loving)

Question 6

integral proteins

Answer 6

a permanent part of the membrane

Question 7

transmembrane protein

Answer 7

integral proteins that span the entire bilayer

Question 8

peripheral proteins

Answer 8

temporarily attached to the plasma membrane

Question 9

protein function

Answer 9

transport - control what enters and exits cell
catalysis - speeds up chemical reactions
communication - receive signals and recognise cell and molecules
adhesion - stick to other cells

Question 10

carbohydrates

Answer 10

in chains and extend outside the cell, rooted in membrane to lipid or protein
aids with cell to cell communication

Question 11

cholesterol

Answer 11

a lipid steroid embedded in between the fatty acid tails of the phospholipid bilayer
regulates the fluidity of the membrane