Multiple Choice
In eukaryotic cell architecture, the __________ is often described as the control center of the cell because it houses 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, which cell type normally lacks a nucleus at maturity?
A
Hepatocyte (liver cell)
B
Mature human red blood cell (erythrocyte)
C
Neuron
D
Skeletal muscle cell fiber
Verified step by step guidance1
Understand that the nucleus is a defining feature of eukaryotic cells, containing the cell's genetic material and controlling many cellular functions.
Recall that most eukaryotic cells, including hepatocytes, neurons, and skeletal muscle fibers, retain their nuclei throughout their mature life to perform their specialized functions.
Recognize that mature human red blood cells (erythrocytes) are unique among eukaryotic cells because they lose their nucleus during maturation to maximize space for hemoglobin, which is essential for oxygen transport.
Identify that this loss of the nucleus in mature erythrocytes is an adaptation to their function, making them the only mature eukaryotic cell type listed that normally lacks a nucleus.
Conclude that the correct answer is the mature human red blood cell (erythrocyte) because it is the only cell type among the options that normally lacks a nucleus at maturity.
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