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Zorluk: Çok zorCell Structure and Function

Because mature mammalian red blood cells lack both a nucleus and mitochondria, they are incapable of generating ATP and must rely entirely on the surrounding blood plasma for their cellular energy requirements.

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Cevap

False
The statement is false. While it is true that mature mammalian red blood cells extrude their nucleus and mitochondria to maximize oxygen-carrying capacity, they are not incapable of generating ATP. They produce the ATP they need internally through anaerobic glycolysis, a process that occurs in the cytoplasm and does not require mitochondria.

Adım Adım Çözüm

1
Analyze the structural characteristics of mature mammalian red blood cells mentioned in the statement.
The statement correctly identifies that these cells lack a nucleus and mitochondria to maximize space for hemoglobin.
Verifying the anatomical premises is the first step in evaluating complex biological statements.
2
Evaluate the functional claim that lacking mitochondria completely prevents ATP generation.
While mitochondria are the primary site of aerobic respiration and high ATP yield, ATP can still be produced without them via anaerobic glycolysis in the cytoplasm.
Understanding alternative cellular energy pathways is necessary to assess the absolute claim made in the statement.
3
Determine the actual energy source for mature mammalian red blood cells.
They generate the ATP they need internally through glycolysis rather than absorbing it directly from the plasma.
This confirms that the final conclusion of the statement is biologically inaccurate.

Anahtar Kavram

Organelle Function and Cellular Energy
Tahmini Süre:45s
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Konular

Cell Structure and Function

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