Which is a complete list of the ingredients that are essential for PCR?
a. nucleotides, DNA template, Taq polymerase, and primers
b. nucleotides, DNA template, DNA ligase, and primers
c. restriction enzymes, DNA template, Taq polymerase, and primers
d. nucleotides, DNA template, Taq polymerase, and plasmids
e. nucleotides, DNA template, DNA ligase, and plasmids
ANSWER: a
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Of the following molecules, which passes through a lipid bilayer most readily?
A. carbon dioxide B. glucose C. K+ D. arginine E. RNA
If nautiloids only inhabit the last chamber, what are the other chambers used for?
a. Egg storage b. Food storage c. Maintaining hypertonic seawater d. Maintaining buoyancy with gases
The sequence of amino acids in a protein is known as the protein’s ________ structure
a. quaternary b. secondary c. tertiary d. primary
Once infected with Trypanosoma brucei, the patient's immune system cannot clear the infection and develop immunity because the parasite
A) has flagella that allow it to travel all over the body. B) matures into infectious trypomastigotes. C) reproduces by binary fission. D) changes its glycoprotein surface antigens every time it replicates. E) invades the central nervous system.