In an inflammatory response, the direct effect of histamine is to ____
a. dilate blood vessels causing increased blood flow to the area of infection
b. decrease heat accumulation in the area of infection
c. directly kill bacteria
d. attack cytotoxic T cells
e. cause B cells to release antibodies
a
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In an enzyme-catalyzed reaction, the reactant is called the
A. coenzyme B. catalyst C. substrate D. product
Answer the following statements true (T) or false (F)
1. Somatic cell mutations are heritable. 2. Mutations can produce a polypeptide with increased function. 3. The timing of a mutation during development has negligible effects on the severity of the genetic defect. 4. Larger genes are usually more likely to incur a mutation than smaller genes.
Which of the following is NOT a characteristic
of type 2 diabetes?
a. pancreatic islet cells are destroyed b. onset of symptoms typically begins in middle age c. obesity is a big risk factor d. diet and exercise can help control it e. all of these are characteristics of type 2 diabetes
In most species, all mRNA transcripts begin with _____
a. methionine b. a ribosome c. AUG d. the P site e. an anticodon