Direct examinations such as the Gram stain serve what purpose?
a. To determine the organism's genetic ma-keup
b. To give the physician an early indication of what may be wrong with the patient
c. To determine the type of flora in the throat and stool specimens
d. To determine the organism's colonial morphologic features
B
Direct examinations enable the laboratory scientist to give the physician an early indication of possible pathogens, enabling him or her to gain insight to guide the work-up of the specimen.
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What are plasmids?
A. Small, circular RNA molecules that contain many genes but that cannot be passed on to other bacteria B. Small, circular DNA molecules that contain just a few genes and that can be passed on to other bacteria C. Small, circular RNA molecules that contain just a few genes and that can be passed on to other bacteria D. Small, circular DNA molecules that contain just a few genes but that cannot be passed on to other bacteria
Bacteria in the _____ make essential vitamins
a. stomach c. large intestine b. small intestine d. esophagus
Protein kinases are enzymes that transfer the terminal phosphate from ATP to an amino acid residue on the target protein. Many are located on the plasma membrane as integral membrane proteins or peripheral membrane proteins
What purpose may be served by their plasma membrane localization? A) ATP is more abundant near the plasma membrane. B) They can more readily encounter and phosphorylate other membrane proteins. C) Membrane localization lowers the activation energy of the phosphorylation reaction. D) They flip back and forth across the membrane to access target proteins on either side.
Coenzymes:
A) break down sugars. B) help enzymes to function. C) serve as catalysts. D) make proteins.