The gene proV codes for an ABC transport protein responsible for bringing proline or glycine betaine into the cell in response to osmotic stress.This gene serves a similar function in Salmonella and E.coli.This is an example of ________ genes.

Question

Quizplus · Accepted Answer

The fact that the gene serves a similar function in both Salmonella and E.coli suggests that it is an ortholog - a gene that has evolved from a common ancestor gene and retained similar function across different species. Nonprotein coding genes do not code for proteins and therefore cannot be responsible for bringing substances into the cell. Paralogs are genes that have arisen from gene duplication events within a genome, but the question does not provide evidence to suggest that this is the case for proV. Degenerate genes have multiple possible codon sequences for the same amino acid, which is not relevant to this question.

The Gene ProV Codes for an ABC Transport Protein Responsible