Which of the following are components of Chargaff's rules of bases?
A) purines = pyrimidines
B) C + T = A + G
C) A + T = G + C
D) G = C
E) all of the above
E) all of the above
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Which of the following is(are) considered when selecting a germicidal chemical?
A. Toxicity B. Cost C. Compatibility with the material being treated D. Environmental impact E. All of the choices are correct.
Which of the mollusks have a closed circulatory system?
a. clams b. slugs c. snails d. squids e. chitons
Attachment of a bacteriophage to its host requires ________.
A. specific receptor molecules on the host cell B. specific surface proteins on the bacteriophage and specific receptor molecules on the host cell C. specific surface proteins on the bacteriophage D. nucleic acid protein interactions
Fungal spores are usually responsible for the bright colors and fluffy textures of the molds that produce them.
Answer the following statement true (T) or false (F)