QQuestionBiology
QuestionBiology
Which answer best describes another function of the cell membrane?
A) The cell membrane helps to protect only plant cells from larger molecules.
B) The selective barrier allows small molecules to enter and exit in animal and plant cells.
C) Animal cells have a thick cell membrane to keep the cells rigid.
D) The cell membrane keeps material from entering and exiting the cell.
12 months agoReport content
Answer
Full Solution Locked
Sign in to view the complete step-by-step solution and unlock all study resources.
Step 1:Let's solve this step by step:
Step 2:: Understand the cell membrane's function
The cell membrane (plasma membrane) is a crucial component of both animal and plant cells. Its primary function is to act as a selective barrier that controls what enters and exits the cell.
Step 3:: Analyze the given options
A) Incorrect - The cell membrane protects both plant and animal cells, not just plant cells. B) Correct - This option accurately describes the membrane's selective permeability. C) Incorrect - Animal cells do not have a thick membrane to keep cells rigid (that's the cell wall in plant cells). D) Incorrect - The membrane does NOT prevent all material from entering and exiting; it selectively allows specific molecules to pass through.
Step 4:: Explain the selective barrier function
\bullet$$ Active transport
The cell membrane is a phospholipid bilayer with embedded proteins that: - Allows small molecules like water, oxygen, and carbon dioxide to pass through - Blocks larger molecules or harmful substances - Controls the movement of materials in and out of the cell through processes like:
Final Answer
B) The selective barrier allows small molecules to enter and exit in animal and plant cells.
Need Help with Homework?
Stuck on a difficult problem? We've got you covered:
- Post your question or upload an image
- Get instant step-by-step solutions
- Learn from our AI and community of students