AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

DNA MAKES RNA MAKES PROTEIN

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A ____ is a small ring of DNA found in a bacterial cell.
A
virus
B
plasmid
C
gene bullet
D
PCR
Explanation: 

Detailed explanation-1: -A plasmid is a small, circular, double-stranded DNA molecule that is distinct from a cell’s chromosomal DNA. Plasmids naturally exist in bacterial cells, and they also occur in some eukaryotes. Often, the genes carried in plasmids provide bacteria with genetic advantages, such as antibiotic resistance.

Detailed explanation-2: -A plasmid is a small circular DNA molecule found in bacteria and some other microscopic organisms. Plasmids are physically separate from chromosomal DNA and replicate independently.

Detailed explanation-3: -At their most basic level, plasmids are small circular pieces of DNA that replicate independently from the host’s chromosomal DNA. They are mainly found in bacteria, but also exist naturally in archaea and eukaryotes such as yeast and plants.

Detailed explanation-4: -They are most commonly found as small circular, double-stranded DNA molecules in bacteria; however, plasmids are sometimes present in archaea and eukaryotic organisms. In nature, plasmids often carry genes that benefit the survival of the organism and confer selective advantage such as antibiotic resistance.

Detailed explanation-5: -Plasmid. A plasmid is a ring-shaped piece of DNA that is found within bacterial cells. Plasmids replicate independently of the chromosomal DNA found in the nucleoid but are always copied into next generation cells. Plasmids often contain genes that give bacteria genetic advantages such as antibiotic resistance.

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