Multiple Choice
Which of the following is required for active transport to occur across a cell membrane?
21
views
6. The Membrane
Active Transport
Struggling with General Biology?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Active transport is different from simple diffusion because active transport:
A
does not involve membrane proteins
B
occurs only in prokaryotic cells
C
moves substances down their concentration gradient
D
requires energy input from the cell, usually in the form of ATP
Verified step by step guidance1
Understand the concept of active transport: Active transport is a process where substances are moved across a cell membrane against their concentration gradient (from low concentration to high concentration). This requires energy input, typically in the form of ATP.
Contrast active transport with simple diffusion: Simple diffusion is a passive process where substances move down their concentration gradient (from high concentration to low concentration) without requiring energy or membrane proteins.
Identify the role of membrane proteins in active transport: Active transport involves specific membrane proteins, such as pumps or transporters, which facilitate the movement of substances against their concentration gradient.
Recognize the energy requirement: Active transport requires energy input from the cell, usually in the form of ATP, to power the membrane proteins that move substances against the gradient.
Clarify the cellular context: Active transport occurs in both prokaryotic and eukaryotic cells, not exclusively in prokaryotic cells, and is essential for maintaining cellular homeostasis and transporting vital molecules.
Related Videos
Related Practice
Active Transport practice set
Problem sets built by lead tutorsExpert video explanations