A reaction where an electron is lost is called ________.
A. reduction
B. oxidation
C. ionization
D. decomposition
E. dissolution
Answer: B
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C. gel electrophoresis A small amount of DNA is collected from a crime scene. However, the amount of DNA collected is insufficient to perform the necessary experiments to link a suspect to the crime. What method could be utilized to increase the amount of DNA?
A. Southern blotting B. gel electrophoresis C. polymerase chain reaction (PCR) D. colony hybridization E. DNA sequencing
Gene therapy involves:a
replacing all mutant alleles in body cells. b. replacing poor copies of alleles with normal alleles. c. replacing a mutant allele in certain body cells with a normal allele. d. repairing mutant alleles in certain body cells. e. improving gene expression in key body cells.
Often point mutations can cause a protein to be made that differs in just one amino acid. Which of the following changes is most likely to cause the greatest change in protein function?
A) a mutation that replaces a valine with an isoleucine B) a mutation that replaces a proline with an aspartic acid C) a mutation that replaces a glutamic acid with an aspartic acid D) a mutation that replaces a serine with a cysteine E) a mutation that replaces an asparagine with a glutamine
A physician specializes in surgery involving the following group of organs: mouth, esophagus, stomach and intestines. Overall, this physician is specialized at which level of organization?
(a). cell (b). tissue (c). organ (d). organ system (e). organism