In bacterial cells, mesosomes functionally substitute for which of the following?
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Answer: B. Mitochondria
Explanation
Mesosomes in bacterial cells are infolded plasma membranes that facilitate crucial cellular respiration processes. Because bacteria lack true membrane-bound organelles, mesosomes functionally substitute for mitochondria. These folded membrane structures increase surface area to host enzymes responsible for generating metabolic energy. Bacteria are prokaryotic organisms characterized by the absence of a distinct nucleus and membrane-bound organelles. Mitochondria are the powerhouse organelles found exclusively in complex eukaryotic cells to produce cellular energy. Scientific debate historically surrounded the exact structure of mesosomes, viewing some as fixation artifacts.
Microbiology education contrasts prokaryotic and eukaryotic cellular structures to highlight evolutionary developments. Studying bacterial respiration mechanisms helps researchers understand how single-celled pathogens survive and multiply. Cellular biology research continues to explore how prokaryotes manage metabolic tasks without classical organelles. Ribosome is incorrect because ribosomes are responsible for protein synthesis rather than cellular respiration. Golgi bodies are eukaryotic organelles involved in packaging proteins rather than structures found in bacteria. None of these is incorrect because mitochondria is the exact organelle functionally replaced by mesosomes.
- Subject
- Everyday Science
- Category
- Everyday Science
- Topic
- —
- Difficulty
- medium
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