In the eukaryotic cell proteins do not last forever. As they degrade, the change in their numbers affects their productivity and affects whether or not the processes they are responsible for continue to occur. This is an example of what type of gene regulation?

DNA possesses what type of charge?

True or false: Prokaryotic cells need additional molecules, called transcription factors, to bind to a promoter sequence before transcription can begin.

In the eukaryotic cell, after the transcription product leaves the nucleus it must join with a ribosome to continue the gene expression process. Various proteins and other molecules can bind to, or be attached to, the transcription product and can either help with this joining or hinder it. This is an example of what type of gene regulation?

Gel electrophoresis commonly separates DNA fragments based on what property?

What polypeptide would result from the translation of an mRNA strand with the sequence listed below? Use the provided codon chart to determine the amino acid sequence – you may list the amino acids either by their three letter abbreviation or by their full name. You should also identify the N terminus and C terminus of the sequence. For students who need it, the long description for the codon chart is linked beneath the image.    5′ – AUG-AGA-UCC-CAU-UGA – 3′ Accessible Codon Chart Long Description.pdf   

Which viral life cycle involves only the immediate takeover of host cellular machinery and production of new viruses?

During translation, RNA nucleotides are read in reading frames of how many nucelotides?

Outline the process of RNA splicing. Then identify how this can be used to produce different proteins from the same DNA sequence through alternative splicing.

As the amount of tryptophan in an E. coli cell increases, explain what will happen to: The trp operon Tryptophan-related enzyme activity You should explain in detail, identifying both what will happen to both of these and why it will happen.