Which of the following is NOT involved in nonspecific defenses?
A. natural killer cells
B. monocytes
C. neutrophils
D. mast cells
E. B cells
E. B cells
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Quorum sensing
A. depends on the sensing of signal protein molecules. B. is a phenomenon in which bacteria monitor their own population density. C. plays an important role in formation of biofilms by Pseudomonas aeruginosa. D. All of the choices are correct.
While analyzing forensic evidence gathered at a crime scene, a lab technician assigned to the case compares DNA collected at the scene to DNA from three suspects. The technician finds that all three suspects have genetic maps that are similar to the DNA collected at the scene, but they all have a number of unique markers that differ from the DNA evidence. What conclusion can be drawn from these facts?
a. The evidence from the crime scene has been contaminated and is no longer admissible in court. b. All three suspects belong to the same family as the person who left their DNA at the crime scene. c. All three suspects probably belong to the same species as the individual who left DNA at the scene. d. None of the suspects were at the crime scene, and they no longer need to be investigated in this case.
If you ate a piece of toast covered with butter, which macromolecule components would result after your body breaks down the food?
A) amino acids and glycerol B) glycerol, fatty acids, and monosaccharides C) monosaccharides and amino acids D) fatty acids, amino acids, and polysaccharides
Selective media can _____ or ____ growth, while differential media helps with ______ .
Fill in the blank(s) with the appropriate word(s).