Question

The RTF region enables the plasmid to:
A) be transmitted to other bacteria by conjugation.
B) undergo transformation.
C) replicate in the host cell.
D) code for enzymes that inactivate specific drugs.

Answer 1

Hint: Plasmids are an extra-chromosomal genetic element that exists in several bacterial strains. R plasmid is a DNA molecule that grants bacterial resistivity to one antibiotic or more. It includes two components mainly such as resistance determinants and a resistance transfer factor (RTF). Resistance Transfer Factor (RTF) is an old name for a plasmid that codes for antibiotic resistance.

Complete Step-by-step answer: RTF is an essential factor liable for the transmission of plasmids among bacteria, and r-determinants are genetic codes that promote antibiotic resistivity. R plasmids are also known as resistance plasmids and are liable for resistance to the drugs. Resistance or R plasmid is a circular DNA that is composed of genes that make the bacterium antibiotic-resistant. Such a plasmid comprises two segments of DNA, one is liable for replication and the transfer of R plasmid, and the second has the genes that produce substance neutralising the action of one or another antibiotic or other drugs. These plasmids are conjugative and spread among the bacteria through conjugation. The resistance transfer factor (RTF) is around 80 kb in length and carries genes for autonomous replication, conjugation, and resistance to ampicillin. The RTF is largely homologous to the F factor and includes the same genes.
Therefore, the correct answer is Option A.
Note: R-factor, or resistance factor, are plasmids that allow certain bacteria in order to obtain resistance against antibiotics. Plasmids are tiny, extra-chromosomal structures found in bacteria that can reproduce themselves. These circular molecules of DNA have a double-stranded format and are also found in multi-cellular organisms and archaea.