Question 18M.2.HL.TZ1.6a
| Date | May 2018 | Marks available | [Maximum mark: 4] | Reference code | 18M.2.HL.TZ1.6a |
| Level | HL | Paper | 2 | Time zone | TZ1 |
| Command term | Draw | Question number | a | Adapted from | N/A |
Draw a labelled diagram to show the fluid mosaic model of the plasma membrane.
[4]
a. two correctly orientated layers of phospholipids/phospholipid bilayer shown withheads facing in opposite directions
b. phospholipids shown with two parts labelled hydrophilic/phosphate head AND hydrophobic/hydrocarbon tail
c. protein (any) shown as a globular structure embedded in one/both layers of phospholipid
d. peripheral protein shown as globular structures at the surface of the membrane AND integral protein shown as embedded globular structures
e. glycoprotein shown as embedded globular structure with antenna-like carbohydrateprotruding
OR
carbohydrate shown as branched/antenna-like structure attached either to a protein or to a phospholipid
OR
channel protein(s) shown with a pore passing through it
OR
pump protein shown as a transmembrane globular structure
f. cholesterol shown in between adjacent phospholipids
Do not award the mark unless the structure is labelled with the underlined name.
