Plasmid cloning vectors are engineered to have cloning sites for foreign DNA fragments that consist of a series of cutting sites for different restriction endonucleases.  This allows DNA fragments that are generated by a variety of restriction endonucleases to be incorporated into the vectors.  These multiple arrays of restriction enzyme sites are called:

A correct statement about cruciform DNA structures is which of the following?

Taq DNA polymerase is an essential enzyme used in which laboratory procedure?

The phosphate system buffers the intracellular fluid of cells at physiological pH. In this buffer system, excess alkalinity [OH-] is neutralized by reacting with:

Which of the following correctly describes the mode of action of restriction endonucleases in degrading DNA?

The melting temperatures (Tm) of the DNA purified from several organisms are given in (a) through (e) below. From these melting temperatures, which organism has DNA with the highest A+T content?

An incorrect statement about plasmid cloning vectors is which of the following?

Cells contain several major types of RNA molecules: messenger RNA, transfer RNA, ribosomal RNA, and small nuclear RNA. What percentage of total cell RNA is ribosomal RNA?

DNA gyrase is a bacterial enzyme that acts upon circular DNA molecules. An incorrect statement about DNA gyrase is:

(True/False) Lymph flow bidirectional.