Module 3: II. Phospholipid bilayer, III. Bacterial Cytoplasmic membrane, IV. Fludi mosaic model

Question 1

Framework of the cytoplasmic membrane

Answer 1

-phospholipid bilayer

Question 2

Three components of the phospholipid bilayer

Answer 2

• Lipids
  -proteins
  -carbohydrates

Question 3

Describe the phospholipid

Answer 3

-Amphipathic
-hydrophilic (polar) heads
-hydrophobic (non-polar) tails

Question 4

Hydrophobic components in eukarya and bacteria

Answer 4

-fatty acids

Question 5

hydrophilic components in eukarya and bacteria

Answer 5

-gycerol molecule with phosphate

Question 6

descibe the orientation of the hydrophobic and hydrophilic components

Answer 6

hydrophobic components are pointed inwards, causing hydrophic fusion
hydrophilic components remain at either the environment or the cytoplasm

Question 7

the structure is called a______and each one unit is ____

Answer 7

lipid bilayer
phospholipid

Question 8

Difference in the linkages between eukarya and bacteria vs. archaea

Answer 8

-eurkarya and bacteria- ester linkages
-archaea - ether linkages

Question 9

Who proposed fluid mosaic model

Answer 9

-Singer and nicolson 1970

Question 10

Membrane is a mosaic of

Answer 10

lipids, proteins and carbohydrates

Question 11

Why is it fluid

Answer 11

-proteins, and carbohydrates can move relatively within the membrane

Question 12

What are the two leaflets
- describe symmetry

Answer 12

-half of a lipid bilayer: extracellular and cytosol leaflets
-assymetrical

Question 13

Why is it assymetrical

Answer 13

due to the glycolipids and glycoprotiens attached to the extracellular leaflets

Question 14

Forms of carbohydrates in the extracellular membrane and function

Answer 14

-glycoprotein and glycolipid allows cell-to-cell recognition