Thanks for reaching out! Four days in the Cinque Terre sound wonderful. From Venice, youâre going to want to take the fast train to Florence, then switch to a train to La Spezia. The route takes 5 hours, and you can see the various options by putting in âVeneziaâ to begin and âLa Speziaâ to end on trenitalia.it.
The cell cycle is controlled by the products of two classes of genes, proto-oncogenes and tumor suppressor genes. Normally the expression of these genes is balanced. 1. Proto-oncogenes encode proteins that promote cell division (These proteins act like the gas pedal on a car.. Cyclins: a family of proteins that regulate the timing of the cell cycle. These proteins trigger cell division. Internal regulators: several proteins make sure the cell cycle does not proceed unless certain processes have happened inside the cell.
Report Abuse. Transcription factors are protein complexes that help RNA polymerase bind to DNA. RNA polymerase is the enzyme that transcribes genes to make messenger RNA, which is then used to make protein.By controlling RNA polymerase's access to the gene, transcription factors control the rate at which a gene is transcribed.Without transcription factors, cells would not be able to effectively regulate the rate at which genes are expressed.hat is the function of transcription factors in eukaryotic cells? A. They control the expression of certain genes. B. They bend the DNA to bring it close to the operator.