Multiple Choice
In a typical eukaryotic cell, in which organelle is most of the cell's DNA found?
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1. Overview of Cell Biology
Eukaryotic Cell Architecture
Multiple Choice
In eukaryotic cell architecture, what is the primary structural component of the cell wall in plants?
A
Peptidoglycan (murein) cross-linked by short peptides
B
A plasma-membrane-derived lipid bilayer rich in cholesterol and sphingolipids
C
Glycogen granules interconnected by cytoskeletal proteins
D
Cellulose microfibrils embedded in a matrix of hemicelluloses and pectins
Verified step by step guidance1
Understand that the question asks about the primary structural component of the plant cell wall in eukaryotic cells.
Recall that plant cell walls are mainly composed of polysaccharides, which provide rigidity and structural support.
Identify that cellulose microfibrils are long chains of glucose molecules that form strong fibers, which are the main load-bearing elements in the plant cell wall.
Recognize that these cellulose microfibrils are embedded in a matrix of other polysaccharides such as hemicelluloses and pectins, which help maintain the wall's integrity and flexibility.
Conclude that the primary structural component of the plant cell wall is cellulose microfibrils embedded in a matrix of hemicelluloses and pectins, distinguishing it from other options like peptidoglycan (found in bacterial walls) or lipid bilayers (components of membranes).
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