Which of the following techniques is most commonly used to separate and analyze DNA by size?
A) PCR
B) Agarose gel electrophoresis
C) DNA microarray analysis
D) Hybridization
E) DNA libraries
B
You might also like to view...
Crossing over mixes up _____
a. chromosomes b. alleles c. zygotes d. gametes
The function of a protein is dependent upon the shape into which the chain of amino acids folds. Many noncovalent interactions are responsible for maintaining the protein's shape. Assume you have isolated a protein from an organism in its proper shape, and you have treated it with an enzyme that selectively targets and breaks only the peptide bonds in the proteins. Would the protein retain its shape under these conditions?
a. Yes; because the noncovalent interactions that determine the shape of a protein are stronger than the peptide bonds. b. No; while the noncovalent bonds determine the shape of a protein, the peptide bonds are required to hold the amino acids together. c. Yes; but the shape would be affected to a greater extent by changes in temperature. d. Yes; once noncovalent bonding determines the shape of a protein, the peptide bonds are no longer necessary.
If an allele has a frequency of 1:
a. It is found in 50% of the population b. It is found in 25% of the population c. It is found in 100% of the population d. It is found in 0% of the population
Which of the following diseases is considered an emerging disease because it was unknown before 1987?
A) anaplasmosis B) Brill-Zinsser disease C) murine typhus D) Rocky Mountain spotted fever E) lymphogranuloma venereum