(ch. 8) Cellular membranes are fluid mosaics of lipids and proteins

Question 1

fluid mosaic model

Answer 1

proteins are embedded in the phospholipid bilayer

Question 2

amphipathic

Answer 2

hydrophillic- “water loving”- region and hydrophobic region

Question 3

how do phospholipids and some proteins move within the membrane

Answer 3

sideways

Question 4

Unsaturated hydrocarbon tails

Answer 4

belong to some phospholipids. They keep the membrane fluid at lower temperatures while cholesterol helps membranes resist changes in fluidity caused by temperature changes.

Question 5

membrane proteins

Answer 5

function in transport, enzymatic, signal transduction, cell-cell recognition, intercellular joining and attachment to the cytoskeleton and extracellular matrix. Short chains of sugars linked to proteins and lipids on the exterior side of the plasma membrane interact with surface molecules of other cells

Question 6

glyco

Answer 6

refers to carbs

Question 7

membrane proteins and lipids are synthesised where?

Answer 7

in the ER and modified in the ER and golgi apparatus. Inside and outside faces of membranes differ in molecular composition.