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Most prokaryotes reproduce by undergoing

A.

mitosis

B.

meiosis

C.

binary fission

D.

All of the above

Answer and Explanation

The Correct Answer is C

A. Mitosis: Mitosis is a mode of nuclear division characteristic of eukaryotic cells that have a defined nucleus and mitotic spindle; prokaryotes lack a nucleus and do not undergo mitosis.

B. Meiosis: Meiosis is a form of reductive nuclear division associated with sexual reproduction in eukaryotes; prokaryotes do not perform meiosis.

C. Binary fission: Binary fission is the asexual division process used by most prokaryotes, where the cell duplicates its DNA and divides into two genetically similar daughter cells.

D. All of the above: This would imply prokaryotes use mitosis and meiosis as well as binary fission; because mitosis and meiosis are eukaryotic processes, this option is not accurate.


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Related Questions

Correct Answer is B

Explanation

A. Linear: Linear chromosomes occur in eukaryotes and some bacteria/archaea rarely, but this is not the most common arrangement in prokaryotes.

B. Circular: Most prokaryotic chromosomes are circular DNA molecules lacking membrane-bound nuclei, forming a closed loop that compacts in the nucleoid region.

C. Many separated pieces: Some bacteria have plasmids or multiple replicons, but the typical prokaryotic chromosome is a single circular molecule rather than many separated chromosomal pieces.

D. Single-stranded: Prokaryotic chromosomal DNA is double-stranded, not single-stranded.

Correct Answer is D

Explanation

A. rRNA only: Some genes encode ribosomal RNA, but not all genes are limited to rRNA.

B. tRNA only: Some genes encode transfer RNA, but genes can encode other RNA types or proteins as well.

C. mRNA and polypeptide only: Some genes encode mRNA that is translated into polypeptides, but genes also encode functional RNAs that are not translated.

D. Any of the above: A gene can encode rRNA, tRNA, or mRNA (which may be translated into a polypeptide), so any of these products can be specified by different genes.

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