Question

The endosymbiotic hypothesis suggests that there are similarities between prokaryotes, mitochondria and chloroplasts like:

• A. The presence of circular DNA associated with histones and 70S ribosomes
• B. The presence of circular DNA not associated with histones and 70S ribosomes
• C. 50S ribosomes and DNA
• D. 30S ribosomes and DNA

Answer 1

The correct option is B The presence of circular DNA not associated with histones and 70S ribosomes

According to the endosymbiotic hypothesis, the following similarities were found between chloroplasts, mitochondria, and prokaryotic cells:
(1) Chloroplasts and mitochondria are of the same size as prokaryotic cells.
(2) They have their own DNA that is circular, not linear, and not associated with histones.
(3) They have their own ribosomes that have 30S and 50S subunits (total 70S).