The protein coat covering the nucleic acid core of the virus is called the
a. capsid.
b. virion.
c. nucleocapsid.
d. envelope.
e. membrane.
A
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Which of the following can control mRNA stability?
A. The stop codon that is used to terminate translation in the mRNA B. AU rich elements in the mRNA C. distance of the stop codon to the polyA tail D. number of A's in polyA tail
Which one of the following features is unique to animals?
A. cells organized into tissues B. movement associated with muscle tissue and nervous tissue C. heterotrophism D. cells without walls E. embryonic development
Centrioles are only found in plant cells
a. True b. False
Less-developed countries are most likely to be characterized by:
a. low fertility rates. b. high GNI PPPs. c. low doubling times. d. high use of contraception. e. high infant mortality rates