Multiple Choice
Which structure in the mitochondrion is responsible for housing the enzymes of the electron transport chain?
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5. Cell Components
Mitochondria & Chloroplasts
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Chloroplasts and mitochondria are similar in that they both:
A
lack a double membrane structure
B
are found only in animal cells
C
contain their own DNA and ribosomes
D
produce glucose as their primary function
Verified step by step guidance1
Understand the structure of chloroplasts and mitochondria: Both organelles have a double membrane structure, which is essential for their functions. This eliminates the first option ('lack a double membrane structure').
Identify the types of cells where chloroplasts and mitochondria are found: Chloroplasts are found in plant cells and some protists, while mitochondria are found in both plant and animal cells. This eliminates the second option ('are found only in animal cells').
Recall the unique features of chloroplasts and mitochondria: Both organelles contain their own DNA and ribosomes, allowing them to produce some of their own proteins independently of the cell's nucleus. This supports the correct answer ('contain their own DNA and ribosomes').
Analyze the primary function of chloroplasts and mitochondria: Chloroplasts are primarily involved in photosynthesis, producing glucose, while mitochondria are involved in cellular respiration, generating ATP. This eliminates the fourth option ('produce glucose as their primary function').
Conclude that the correct answer is based on the shared characteristic of chloroplasts and mitochondria: They both contain their own DNA and ribosomes, which is a key feature distinguishing them from other organelles.
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