Multiple Choice
What can we infer if we observe a large number of mitochondria in a cell?
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11. Aerobic Respiration
Mitochondria
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In the diagram of a mitochondrion, the letter 'A' is most likely used to indicate which structure?
A
Nuclear envelope
B
Ribosome
C
Cristae
D
Golgi apparatus
Verified step by step guidance1
Understand the context of the question: The mitochondrion is a double-membraned organelle responsible for energy production in eukaryotic cells. The question asks about identifying a structure labeled 'A' in a diagram of a mitochondrion.
Review the key structures of a mitochondrion: These include the outer membrane, inner membrane, intermembrane space, cristae (folds of the inner membrane), and the matrix (the innermost compartment).
Focus on the term 'cristae': Cristae are the folds of the inner mitochondrial membrane that increase the surface area for energy production processes like the electron transport chain and ATP synthesis.
Eliminate incorrect options: The nuclear envelope surrounds the nucleus, not the mitochondrion. Ribosomes are involved in protein synthesis and are not specific to the mitochondrion's structure. The Golgi apparatus is a separate organelle involved in protein modification and sorting.
Conclude that the correct answer is 'cristae,' as it is a defining feature of the mitochondrion and is likely labeled 'A' in the diagram to indicate the folded inner membrane structure.
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