Multiple Choice
In eukaryotic cell architecture, what organelle is considered the control center of the cell because it houses most of the genetic material and regulates gene expression?
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1. Overview of Cell Biology
Eukaryotic Cell Architecture
Multiple Choice
In eukaryotic cell architecture, what is the primary purpose of the cell wall in organisms such as plants and fungi?
A
To store and replicate the cell’s DNA during the cell cycle
B
To provide structural support and protection by resisting osmotic pressure and helping maintain cell shape
C
To generate most cellular ATP through oxidative phosphorylation on its surface
D
To regulate selective transport of ions and small molecules via membrane channels and pumps
Verified step by step guidance1
Identify the main function of the cell wall in eukaryotic organisms like plants and fungi by considering its structural role outside the plasma membrane.
Recall that the cell wall is a rigid layer composed mainly of polysaccharides such as cellulose in plants and chitin in fungi, which provides mechanical strength.
Understand that the cell wall helps resist osmotic pressure, preventing the cell from bursting when water enters by osmosis, thus maintaining cell shape and integrity.
Differentiate the cell wall's function from other cellular components: DNA storage and replication occur in the nucleus, ATP generation happens in mitochondria, and selective transport is managed by the plasma membrane.
Conclude that the primary purpose of the cell wall is to provide structural support and protection, helping the cell maintain its shape and resist osmotic stress.
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