The enzyme that breaks down ethanol is
alcohol
a. dehydrogenase.
b. oxidase.
c. peroxidase.
d. catalase.
e. protease
A
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Compared to Eukaryotes, Bacteria and Archaea have ________ surface-to-volume ratios, causing ________ nutrient exchange and growth rates
A) lower / lower B) lower / higher C) higher / lower D) higher / higher
Gene methylation can be detected through the use of restriction endonucleases. Usually these are used in pairs where one enzyme will digest only unmethylated DNA in its recognition sequence while the other is insensitive to methylation
Which of the following statements is correct? A. The enzyme that is insensitive to methylation serves as a control to make sure the inability of the other enzyme to digest DNA is not due to a mutation B. These are used in pairs since experiments have to be replicated and this one way of performing a replication of the experiment C. The experimental design is flawed since there should be a third enzyme that would serve as a positive cocntrol D. This experimental design is able to detect most of the methylated C residues in a particular region of DNA.
The most common sexually transmitted bacterial pathogen and a major cause of pelvic inflammatory disease (PID) is:
a. Rickettsia rickettsii. b. Chlamydia trachomatis. c. Klebsiella granulomatis. d. Coxiella burnetii.
In the respiratory tract, pileated cells constantly sweep mucus that contains trapped foreign matter
Indicate whether the statement is true or false.