Multiple Choice
In eukaryotic cells, waste products are primarily stored in which of the following organelles?
20
views
6. The Membrane
Biological Membranes
Struggling with General Biology?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Biological membranes are selectively permeable, allowing certain substances to:
A
pass through while restricting others
B
be completely blocked from entering or leaving the cell
C
pass through without any restriction
D
move freely in both directions regardless of size or charge
Verified step by step guidance1
Understand the concept of selective permeability: Biological membranes are selectively permeable, meaning they allow certain substances to pass through while restricting others based on factors like size, charge, and polarity.
Review the structure of the biological membrane: The membrane is composed of a phospholipid bilayer with embedded proteins. The hydrophobic core of the bilayer restricts the passage of polar or charged molecules, while small nonpolar molecules can diffuse freely.
Consider the role of transport proteins: Embedded proteins in the membrane facilitate the movement of specific molecules that cannot pass through the bilayer directly. These include channel proteins and carrier proteins.
Analyze the options provided: Evaluate each option based on the concept of selective permeability. For example, substances cannot pass through without restriction or move freely regardless of size or charge, as the membrane imposes selective barriers.
Conclude with the correct understanding: The correct answer aligns with the principle of selective permeability, which allows certain substances to pass through while restricting others.
Related Videos
Related Practice
Biological Membranes practice set
Problem sets built by lead tutorsExpert video explanations