Retroviruses are responsible for which of the following conditions?
A) Rous sarcoma
B) AIDS
C) Feline leukemia
D) Mouse mammary tumors
E) All of these
E
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You isolate a purify a bacteriophage that can replicate in E. coli. Through chemical analyses you determine that the only nucleic acid present is RNA
You isolate the RNA and put it in a test tube with all of the necessary proteins and RNAs for translation. The RNA is translated and new infectious virions are made. What does this tell you about the bacteriophage? A) The RNA genome is of the plus sense. B) The RNA genome is of the plus sense and RNA replicase is present in the viral capsid. C) The new bacteriophage is a retrovirus. D) RNA replicase is present in the viral capsid.
The adenylation of DNA ligase is:
A. an unstable initial step in the reaction. B. occurs at a lysine residue in the DNA binding domain. C. dependent on the presence of DNA. D. independent of the presence of DNA. E. more efficient at lower pH.
A soft drink manufacturer, notorious for making marketing claims that are deceptive but technically accurate, has released a new sports beverage. The advertisements for this beverage assert that it contains an ingredient necessary for life, guaranteed to absorb into cells as fast as, if not faster than, the competition’s sports beverages and is 100% hypotonic. You buy a bottle to test these claims and laugh when you discover what it really is. What are they selling?
a. salt water b. sugar water c. purified water d. corn syrup
Constriction of the pupil of the eye is caused by ____
a. skeletal muscle
b. cartilage c. tendons d. smooth muscle e. cardiac muscle