Question

1. Describe how bacterial DNA transfer from one cell to the others. b) How does penicillin kill bacteria? C) why E.coli Lac operon is an inducible regulation and catabolic pathway?

please help with this genetics hw question it is timed for 35 minutes left anything helps even if it is just 1 a and 1 c i kinda know b

Answer 1

a. There is no obligate sexual production in bacteria, but through the exchange of genetic information they are very active.

Transformation : The transfer of genetic information through the transfer through free DNA agency.

Transduction : By the usage of bacteriophage the portion of DNA transfer from the  one bacterium to another.

The bacteria transfer the DNA (genetic material) from the one cell to another by the conjugation. During conjugation the one (donor) bacteria transfer the cell to another (recipient). By mating process they transfer the materila there must be a male and female cell.

b. The penicillin interfere in peptidoglycon synthesis by inhibiting the transpeptidase reaction (cross linking)

c. The E. coli having lac operon conatin lactose metabolism involved gene. It express when the lactose present and in absence of glucose. They break down the lactose to galactose and glucose.

The gene group with single promoter or operon is an lac operon. The bacteria which use lactose as the source of energy by the protein that encoded in the gene in operon. The lac operon of e. coli having the gene encoding in a metabolic pathway of lactose specific substrate. When the substrate is availabe the enzymes is required, this indicate that the operon expression is induced only in the substrate presence.  The regulatory molecule which is a small molecule that activate or repress the transcription by interacting with a activator or a repressor

Inside the cell allolactose is formed from the lactose when the lactose is present. During the low glucose level, less ATP produce from catabolism and Enzyme IIA ( The enzyme have the ability to switch from the glucose to lactose) phosphorylated. The lac operons are catabolic are induce the substance in the cell to be catabolized are transcribed.