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Get Answers to all your Questions
Which of the following is absent in prokaryotes?
Cell wall
Nucleoid
Plasmid
Mitochondria
Answers (1)
Because prokaryotes don't have mitochondria, prokaryotes make their ATP on the cell surface membrane. Hence option 4 is the correct answer.
Explanation for the incorrect options :
Option 1 is incorrect because prokaryotic cell walls are composed of peptidoglycan, a polymer of modified sugars (N-acetylglucosamine and N-acetylmuramic acid) that has been crosslinked with short peptides.
Option 2 is incorrect because bacteria and other prokaryotic cells contain a free-floating, often circular chromosome that is not protected by a nuclear membrane. Instead, the DNA is only present in the nucleoid, a part of the cell.
Option 3 is incorrect because prokaryotes have a nucleoid in the center of the cell that houses the DNA but is not protected by a nuclear membrane. In addition to chromosomal DNA, many prokaryotes also possess smaller, circular DNA molecules known as plasmids, which can provide genetic benefits in particular situations.
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