After 24 hours incubation with a facultative anaerobic bacterium, the purple-colored Ornithine /broth denotes that the
A. pH did not change
B. pH changes are irrelevant
C. pH had increased after an initial decrease
D. pH had decreased after an initial increase
Ans: C. pH had increased after an initial decrease
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What role, if any, did polysaccharides play in chemical evolution?
A) Polysaccharides catalyzed chemical reactions. B) Polysaccharides used complementary pairing between monosaccharides to copy themselves. C) Glycosidic linkages formed spontaneously between monosaccharides. D) Polysaccharides played little, if any, role in chemical evolution.
What term refers to the genetic makeup of an organism?
What will be an ideal response?
Which of the following statements is true?
A. Microbial metabolism can alter a food to improve its flavor. B. Microorganisms can be a food source. C. Not all microorganisms in food cause foodborne disease. D. All statements are true.
In the fluid-mosaic model, the fluid properties are associated with the nature of the ______ and the mosaic pattern is established by the _______.
a. nucleic acids; phospholipids b. phospholipids; embedded proteins c. embedded proteins; d. cholesterol phospholipids; nucleic acids