Endosymbiotic theory is best supported by which characteristics of cells?

A) organelles with their own DNA
B) double membrane organelles
C) organelles that have bacteria-like properties
D) all of these


Ans: A) organelles with their own DNA

Biology & Microbiology

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The first detailed and quantitative studies on inheritance were carried out by an Austrian monk named _____. 

A. Mendel B. Darwin C. Mendeleev D. Benedict

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The unique antigenic determinants of the 90 serotypes of Streptococcus pneumoniae are found

A) on the cell-surface M proteins. B) on the capsular polysaccharides. C) in the bacterial cell wall. D) in the inclusions in the periplasmic space.

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Which of the following is released when an aminoacyl-tRNA synthetase charges a tRNA?

A. mRNA B. ATP C. AMP D. pyrophosphate E. AMP and pryophosphate

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Deviations from __________ indicate that a

population is evolving. Fill in the blank(s) with the appropriate word(s).

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