What is a virion?
A. a virus genome inside a cell
B. an empty capsid
C. a single virus particle outside a cell
D. an extracellular virus genome
E. a virus genome integrated into a host cell genome
Answer: C
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Tailless nonhuman primates are commonly called: (name the group)
a. anthropoid primates b. new world monkeys c. hominoids d. apes e. chimpanzees
Radiometric dating
a. is based on the premise that each isotope decays at a constant rate. b. is unpredictable because changes in temperature and pressure alter the results. c. can be used to date sedimentary rock. d. has a large error factor. e. is used for dating only recent fossils.
Before clotting factors from recombinant DNA became available, less than half of hemophiliacs in the
U.S. acquired HIV from injection of clotting factors obtained from blood samples. Indicate whether the statement is true or false.
If you can roll your tongue
(a) you have at least one copy of the dominant allele T. (b) you have two copies of the recessive allele t. (c) you must be male. (d) you are haploid.