Fluorescent-labeled antibodies are primarily used on cells to locate a specific
a. DNA sequence.
b. RNA sequence.
c. protein.
d. carbohydrate.
Ans: c. protein.
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Photosynthetic organisms serve as the base for most food chains in the biosphere.
Answer the following statement true (T) or false (F)
The virulence of this organism, which causes chancroid, is most likely attributed to:
a. proteases. b. capsular factors. c. hemolysins. d. catalase.
Which of the following statements is NOT correct about cnidarians?
A. Most are found in shallow coastal marine environments. B. A jellylike mesoglea separates the two tissue layers. C. The adult body is bilaterally symmetrical. D. Stinging cells contain a threadlike nematocyst released to capture prey. E. There are two tissue layers, an outer epidermis, and inner gastrodermis.
Which of the following arrangements is sometimes referred to as having a beads-on-a-string appearance?
A) streptococci B) staphylococci C) streptobacilli D) diplococci E) palisade