The membrane attack stage of the complement cascade involves
A. initiation of the cascade.
B. C1q binding to surface receptors on a membrane.
C. a ring-shaped protein digesting holes in bacterial cell membranes and virus envelopes.
D. the production of inflammatory cytokines.
E. the cleaving of C3 to yield C3a and C3b.
Answer: C
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If you repeated the Hershey and Chase experiment designed to determine the molecule of heredity using a virus with RNA as its genetic material, you would expect that
A) 35S-labeled protein would be transferred to infected cells. B) 32P-labeled DNA would be transferred to infected cells. C) 32P-labeled RNA would be transferred to infected cells. D) 32P-labeled RNA would be transferred to phage ghosts. E) 35S-labeled RNA would be transferred to infected cells.
Researchers tend to name genes based on what
happens in their absence. The tinman gene in Drosophila results in flies a. without hearts. b. with nonjointed legs. c. with a thick exoskeleton. d. with rust colored eyes. e. without brains
_____ are long-chain fatty acids attached to longchain
alcohols. a. Triglycerides b. Phospholipids c. Sterols d. Waxes e. Most neutral fats
Today, obesity is often defined as having a body mass index (BMI) of 20 or greater.
Answer the following statement true (T) or false (F)