Multiple Choice
Which organelle provides most of the cell’s usable energy by producing ATP through cellular respiration?
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11. Aerobic Respiration
Mitochondria
Multiple Choice
In a typical mammalian sperm cell, where are the mitochondria primarily located?
A
Within the sperm nucleus in the head, supplying ATP directly to chromatin
B
In the midpiece, wrapped helically around the axoneme to form the mitochondrial sheath
C
In the acrosome at the anterior tip of the head, providing enzymes for zona pellucida penetration
D
Distributed throughout the principal piece of the tail within the fibrous sheath
Verified step by step guidance1
Understand the structure of a typical mammalian sperm cell, which is divided into three main parts: the head, the midpiece, and the tail.
Recall that mitochondria are the organelles responsible for producing ATP, the energy currency of the cell, which is crucial for sperm motility.
Identify the location where energy production is most needed in the sperm cell, which is the region responsible for movement, primarily the tail.
Recognize that mitochondria are densely packed in the midpiece of the sperm, where they are wrapped helically around the axoneme, forming the mitochondrial sheath to supply ATP efficiently for flagellar movement.
Note that mitochondria are not located within the sperm nucleus, the acrosome, or distributed throughout the principal piece of the tail, as these regions serve different functions.
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