SCIENCE
CELL BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Mitochondria and chloroplasts have their own DNA, which is similar to prokaryotic DNA.
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Fossil evidence shows that the first forms of life were prokaryotic cells.
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All eukaryotic cells have a double-layered membrane composed of phosplipids and proteins.
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Prokaryotes have the same number and types of enzymes as eukaryotes.
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Detailed explanation-1: -> Mitochondria and Chloroplast both have their own DNA and are able to replicate/divide independently of the main cell. This supports the theory that eukaryotic cells engulfed photosynthetic and chemosynthetic prokaryotes at some point in evolution. Option C is the correct answer.
Detailed explanation-2: -So, the correct answer is’The mitochondria and chloroplast have their own DNA’
Detailed explanation-3: -Explanation: Bacteria, a prokaryote, has circular DNA, as do mitochondria and chloroplasts. This provides support for the Endosymbiotic Theory, which states that the mitochondria and chloroplast in eukaryotic cells were once aerobic bacteria (prokaryote) that were ingested by a large anaerobic bacteria (prokaryote).
Detailed explanation-4: -Answer and Explanation: The evidence to support the endosymbiotic theory is that mitochondria and chloroplast have their own DNA and are capable of reproducing independently from the cell. Furthermore, they are the same size of a prokaryotic cell. Prokaryotic cells are smaller than eukaryotic cells.
Detailed explanation-5: -Evidence for Endosymbiosis Evidence that supports the extracellular origins of these organelles can be seen by looking at certain key features: Membranes (double membrane bound) Antibiotics (susceptibility) Division (mode of replication)