Clostridium difficile is a bacterium that is often found in the gastrointestinal tract of healthy individuals. It is also a common cause of hospital-acquired infections
Most individuals who
become ill with C. difficile do so following antibiotic treatment. This information suggests that:
A. C. difficile is not pathogenic (diseasecausing)
in healthy people.
B. C. difficile is resistant to antibiotics and
antiseptics used in the hospital setting.
C. C. difficile is adapted to the human
gastrointestinal tract.
D. C. difficile rebels when other organisms
are eliminated from their environment.
B
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Failure to recover a specific band in a gel made after PCR can be attributed to:
A. inappropriate annealing of primers to the DNA template. B. inappropriate design of gene specific primers. C. inappropriate numbers of cycles for amplification. D. None of the answer options are correct. E. All of the answer options are correct.
The major macromolecules of the ECM are polysaccharides and
A. lipids. B. fat. C. proteins. D. nucleotides. E. amino acids.
Your roommate is experiencing heartburn and asks you to purchase her an antacid. Chemically speaking, how do you know that the antacid will help eliminate her pain?
A) It is a buffer and will prevent the pH in her digestive tract from changing. B) It has a higher OH- concentration to increase the pH in her digestive tract. C) It is probably high in H+. D) It has a low pH to balance the acidity in her digestive tract.
In Figure 16.1, how many mL is the tidal volume?
A) 1700 B) 1300 C) 600 D) 2800 E) 2200