IV.3 Membrane proteins + IV.4 Membrane transport fundamentals

7 important questions on IV.3 Membrane proteins + IV.4 Membrane transport fundamentals

What is the fluid mosaic model?

The fluid mosaic model describes that a membrane consists of a lot of different things --> mosaic.

What are the different membrane proteins and what are their functions?

  • Integral proteins --> transport of receptor
  • Peripheral proteins: inside or outside of the cell membrane --> Allow things to pass through the cell membrane
  • Lipid bound protein: in between the cell membrane (very rare)
  • Glycoproteins --> Signaling

What is passive transport?

Passive transport goes along the concentration and/or electrical gradients, it does not require energy input, and stops at equilibrium.
  • Higher grades + faster learning
  • Never study anything twice
  • 100% sure, 100% understanding
Discover Study Smart

What is active transport? What are the two types of active transport?

Active transport goes against gradients, needs energy input, and goes far beyond the equilibrium. The two types are:
  • Primary active
  • Secondary active

What is primary active transport? Give an example.

Primary active transport is when ATP is needed. An example is pumps (ATPases).

What is secondary active transport? What are the two types?

Secondary active transport uses cotransporters. The two types are:
  • Symport
  • Antiport

Which proteins are involved in transport? What do they do?

  • Defensins: make holes in the membrane
  • Gramicidin A: antibiotic - make holes in the membrane
  • Valinomycin: carrier for K transport

The question on the page originate from the summary of the following study material:

  • A unique study and practice tool
  • Never study anything twice again
  • Get the grades you hope for
  • 100% sure, 100% understanding
Remember faster, study better. Scientifically proven.
Trustpilot Logo