A white blood cell surrounds and engulfs a worn-out red blood cell, forming a vesicle around the red blood cell. This process is called
- phagocytosis.
- exocytosis.
- pinocytosis.
- active transport.
- facilitated diffusion.
phagocytosis.
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Which of the following is(are) true about actinomycete spores?
A. They are all motile due to the presence of a flagellum. B. They withstand desiccation well. C. They are true bacterial endospores. D. They are heat resistant.
All ________ consist of a thiazolidine ring, a beta-lactam ring, and an R group.
A. penicillins B. aminoglycosides C. cephalosporins D. macrolides E. tetracyclines
Which statement about the inflammatory response is false?
a. Bradykinin causes increased capillary permeability. b. Type I interferons and neutrophils secrete histamine. c. Increased blood flow to infected areas brings more phagocytic cells. d. Swelling results from an increase in the volume of interstitial fluid in the infected area. e. Edema and certain enzymes in the plasma cause the pain associated with inflammation.
When we speculate about the origin of life from inorganic material it seems logical that several events or steps were necessary. Which of the following is not a part of these ideas?
A. Organic molecules must first be formed from inorganic molecules. B. Basic organic molecules form RNA that can serve as the genetic material and catalyze other reactions. C. RNA becomes self-replicating. D. The inorganic molecules must be collected together and segregated from other molecules by a membrane.