Propose a series of procedures to determine whether a patient has a urinary tract infection
What will be an ideal response?
Answer: Direct microscopic examination of urine may indicate the presence of abnormal numbers of bacteria in the urine. Also, a Gram stain may be done on urine samples to identify the morphology of potential urinary tract pathogens. Blood agar can be useful for initial isolation. Selective and differential enteric media such as eosin-methylene blue agar permit the initial differentiation of lactose fermenters from non-lactose fermenters while inhibiting the growth of gram-positives. Urine cultures can be done quantitatively by counting colonies on either blood agar or a selective and differential growth medium.
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Three fatty acids bonded together with a glycerol are found in a(n):
A. enzyme. B. chlorophyll pigment. C. phospholipid. D. triglyceride. E. alcohol.
Gene duplications
a. have proved to be adaptive in some cases. b. have resulted in many slightly different hemoglobin molecules in primates. c. always have negative consequences. d. can occur via unequal crossovers at prophase I. e. are all of these EXCEPT “always have negative consequences.”
Living organisms obtain energy by breaking down organic molecules during cellular respiration. Which of the following is the correct sequence for cellular respiration?
A) electron transport, glycolysis, Krebs cycle B) Krebs cycle, glycolysis, electron transport C) glycolysis, Krebs cycle, electron transport system D) glycolysis, electron transport system, Krebs cycle
The ability of the blood to transport oxygen is greatly reduced in individuals who have a dietary deficiency of this mineral
A) Sodium B) Calcium C) Potassium D) Zinc E) Iron