Multiple Choice
Which characteristic is shared by both simple diffusion and facilitated diffusion?
409
views
6. The Membrane
Simple and Facilitated Diffusion
Struggling with General Biology?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
How do simple diffusion and facilitated diffusion differ in terms of their mechanisms of transport across the cell membrane?
A
Simple diffusion requires energy input, while facilitated diffusion does not.
B
Facilitated diffusion is faster than simple diffusion because it uses ATP.
C
Simple diffusion occurs through the lipid bilayer, while facilitated diffusion requires transport proteins.
D
Facilitated diffusion can move substances against their concentration gradient, while simple diffusion cannot.
Verified step by step guidance1
Understand the concept of diffusion: Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration. It is a passive process, meaning it does not require energy input.
Differentiate between simple diffusion and facilitated diffusion: Simple diffusion occurs directly through the lipid bilayer of the cell membrane, allowing small, nonpolar molecules to pass through easily.
Explore facilitated diffusion: Facilitated diffusion involves transport proteins embedded in the cell membrane. These proteins help larger or polar molecules cross the membrane without the need for energy.
Clarify the role of transport proteins: In facilitated diffusion, transport proteins such as channel proteins or carrier proteins provide a pathway for specific molecules to move across the membrane, enhancing the rate of diffusion.
Address concentration gradients: Both simple and facilitated diffusion move substances down their concentration gradient, from high to low concentration. Facilitated diffusion does not move substances against their concentration gradient, contrary to the statement in the problem.
5:10mWatch next
Master Simple and Facilitated Diffusion with a bite sized video explanation from Jason
Start learningRelated Videos
Related Practice
Simple and Facilitated Diffusion practice set
Problem sets built by lead tutorsExpert video explanations