Multiple Choice
Which example best demonstrates diffusion?
20
views
6. The Membrane
Concentration Gradients and Diffusion
Struggling with General Biology?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which of the following best describes a concentration gradient?
A
The movement of water molecules from low to high concentration
B
A uniform distribution of molecules throughout a solution
C
A difference in the concentration of a substance across a space or membrane
D
The process by which cells use energy to move substances against their concentration
Verified step by step guidance1
Step 1: Begin by understanding the term 'concentration gradient.' A concentration gradient refers to the difference in the concentration of a substance between two regions, such as across a space or a membrane.
Step 2: Clarify that molecules naturally move from areas of high concentration to areas of low concentration, a process known as diffusion. This movement does not require energy.
Step 3: Distinguish the concentration gradient from other processes like osmosis, which specifically involves the movement of water molecules, or active transport, which requires energy to move substances against their concentration gradient.
Step 4: Evaluate the options provided in the problem. Eliminate choices that do not align with the definition of a concentration gradient, such as the movement of water molecules or uniform distribution of molecules.
Step 5: Identify the correct description of a concentration gradient as 'a difference in the concentration of a substance across a space or membrane,' which matches the definition provided in Step 1.
4:51mWatch next
Master Concentration Gradients and Diffusion with a bite sized video explanation from Jason
Start learningRelated Videos
Related Practice
Concentration Gradients and Diffusion practice set
Problem sets built by lead tutorsExpert video explanations