Multiple Choice
In what way do the membranes of eukaryotic cells vary?
360
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
What is the definition of selective permeability in biological membranes?
A
The ability of a membrane to prevent any substances from passing through.
B
The ability of a membrane to allow all substances to pass through freely.
C
The ability of a membrane to allow only water molecules to pass through.
D
The ability of a membrane to allow certain molecules to pass through while blocking others.
Verified step by step guidance1
Selective permeability is a fundamental property of biological membranes that allows them to regulate the passage of substances.
Biological membranes are composed of a phospholipid bilayer with embedded proteins, which contribute to their selective permeability.
The phospholipid bilayer acts as a barrier to most water-soluble substances, while allowing lipid-soluble molecules to pass through more easily.
Transport proteins embedded in the membrane facilitate the movement of specific molecules, such as ions and nutrients, across the membrane.
Selective permeability is crucial for maintaining homeostasis within the cell by controlling the internal environment and allowing communication with the external environment.
Related Videos
Related Practice
Biological Membranes practice set
Problem sets built by lead tutorsExpert video explanations