MCQ on Endosymbiont Theory with Answers

The Endosymbiont Theory suggests that certain organelles in eukaryotic cells, particularly mitochondria and chloroplasts, originated as free-living prokaryotic organisms that were engulfed by an ancestral eukaryotic cell. Over time, these engulfed prokaryotes formed a symbiotic relationship with the host cell, eventually becoming an integral part of the eukaryotic cell. The theory was first proposed by Lynn Margulis in the 1960s and is supported by evidence such as the double membranes of these organelles, their own DNA, and their ability to replicate independently of the host cell. This is an MCQ on Endosymbiont Theory with Answers.

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1. 
The endosymbiont theory primarily explains the origin of which two eukaryotic organelles?

2. 
Which of the following supports the endosymbiont theory?

3. 
According to the endosymbiont theory, the ancestor of mitochondria was most likely a:

4. 
Which of the following characteristics of mitochondria and chloroplasts is consistent with the endosymbiont theory?

5. 
Which of the following is NOT a piece of evidence supporting the endosymbiont theory?

6. 
Which scientist is most associated with the development of the endosymbiont theory?

7. 
Which of the following is true about the DNA found in mitochondria and chloroplasts?

8. 
The double membrane structure of mitochondria and chloroplasts is best explained by the endosymbiont theory as:

9. 
The fact that mitochondria and chloroplasts have their own ribosomes supports the idea that:

10. 
What is the most significant implication of the endosymbiont theory for our understanding of eukaryotic evolution?

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