Which of the following regarding antigens is true?
A. A large antigen is likely to have many different epitopes, each of which can stimulate a distinct immune response.
B. An antigen is a molecule which promotes a general immune response.
C. Bacteria do not contain antigens.
D. Antigens can only be recognized by their lipid moieties.
E. The most effective antigens are small simple amino acid complexes.
A. A large antigen is likely to have many different epitopes, each of which can stimulate a distinct immune response.
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Match the following items with the correct phrases.
_______1. A decreased number of white blood cells in the peripheral bloodstream. _______2. Increase in the diameter of blood vessels; an initial event in inflammation. _______3. An increased number of white blood cells in the peripheral bloodstream. _______4. Considered to be the first phase of phagocytosis; the means by which phagocytic cells are attracted to sites where they are needed. a. chemotaxis b. leukocidin c. leukocytosis d. leukopenia e. vasodilation
Agar medium overlaid with olive oil will enhance the growth of which organism?
a. Malassezia b. Candida c. Trichosporon d. Cryptococcus
Mitotic recombination occurs between homologous chromosomes. In which of the following would you not expect to encounter mitotic recombination?
A) e. coli B) tobacco plants C) homo sapiens D) drosophila melanogaster
Much of the evolutionary history of vertebrates can be seen in the way in which their ________ develop.
A. digestive tracts B. embryos C. nervous systems D. brains E. appendages