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Which of the following statements about mitochondria is TRUE? A. The outer mitochondrial membrane is impermeable to ions and small molecules. B. Mitochondria are small round organelles that are often associated with actin filaments of the cytoskeleton. C. In sperm cells, mitochondria are seen wrapping tightly around the nucleus. D. Mitochondria are large enough to be seen with modern light microscopy, and can occupy as much as 20% of cytoplasmic volume.

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Answer:

D. Mitochondria are large enough to be seen with modern light microscopy, and can occupy as much as 20% of cytoplasmic volume.

Explanation:

Mitochondria are oval shaped organelles responsible for cellular respiration.

One of their defining characteristics

is the influx of protons from the mitochondrial membrane that enables ATP synthesis.

Mitochondria are known as the power house of the cell.

Structurally, mitochondria are spherocylindrical with a length of 2 microns and a diameter of 1 micron.

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