Author: Anonymous

A set of genes known to include regions called an operator, promoter, and structural genes that code for proteins is known as a(an) _____________.

In the Indirect Counting method known as the Turbidity Test, a spectrophotometer utilizes light absorbency to determine cell concentration in a sample containing bacteria. 

Extra Credit – Answer either question as completely as possible 1.  Explain how solutes such as salt and sugar preserve and extend the shelf life of foods. Describe why Salt and Sugar are considered physical rather than a chemical method of microbial control.  Name a food that is preserved with sugar or salt for food preservation.   (6 points) Or 2.  What is biotechnology?  In biotechnology, there is a process called Genetic Modification, what two things are commonly used as vectors in a Genetic Modification Procedure?  What are the three characteristics required to make good vectors?  (6 points)          

High Frequency Cells (Hfr) in Conjugation have a portion of a plasmid inserted into its chromosome.

In the figure above, which section (represented with a letter) shows a growth phase where exponential growth begins and the number of new cells is greater than the number of dying cells?

Which direction does DNA Polymerase move when synthesizing a new strand of DNA in Replication?

_________________ is a moist heat treatment that reduces the amount of pathogens and spoilage organisms by using time/temperature ratios.

Which of the following are differences in RNA and  DNA: (Select all that applies)

______________ are the part of the cell that carries out Translation (protein synthesis) by reading codons on ______________.

What binds to the repressor protein that activates it or will “turn off” an operon