Multiple Choice
In eukaryotic cell architecture, which organelle is commonly described as 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 mature mammalian red blood cells (erythrocytes), which organelle is absent to maximize space for hemoglobin and improve oxygen transport?
A
Nucleus
B
Plasma membrane
C
Rough endoplasmic reticulum
D
Golgi apparatus
Verified step by step guidance1
Understand the function of mature mammalian red blood cells (erythrocytes): they primarily transport oxygen throughout the body using hemoglobin.
Recall that to maximize space for hemoglobin, erythrocytes lose certain organelles during maturation to increase their capacity for oxygen transport.
Identify which organelles are typically absent in mature erythrocytes: the nucleus, rough endoplasmic reticulum, and Golgi apparatus are all lost during maturation.
Recognize that the plasma membrane remains intact as it is essential for maintaining cell integrity and controlling the passage of substances.
Conclude that the absence of the nucleus is the key adaptation in mature erythrocytes to maximize space for hemoglobin and improve oxygen transport.
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