Although all of the steps involved in expressing a gene can in principle be regulated, what is the most important stage of control for most genes?
a. RNA processing
b. mRNA translation
c. RNA transport and localization
d. mRNA degradation
e. transcription initiation
Ans: e. transcription initiation
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A 45-year-old man living in the western United States begins experiencing headache, fever, and body aches, which he attributes to the flu. His symptoms, however, become worse, and he later develops kidney disease and acute respiratory failure. He is most likely infected with which vi-rus?
a. Rabies virus b. Adenovirus c. Norovirus d. Hantavirus
The northern boundary of the distribution of Saguaro cacti is defined by
A. areas in which temperatures do not drop below freezing. B. the availability of water year round. C. the presence of pollinating insects. D. proximity to coastal environments. E. the frequency of low-intensity fires.
What is the active site? a. The bottom of the substrate
b. The site on the enzyme in which the substrate attaches. c. The site on the reactant in which the enzyme attaches. d. The surface of the enzyme. e. The site on the substrate in which the enzyme attaches.
A book is being publicized that purports to provide proof that aliens from another planet brought life to Earth. The proof they show are strange fossils of multicellular organisms that look like no animal you have ever seen
What group actually includes these "aliens"? A) organisms with adaptive radiation B) the Ediacaran fauna C) ancient archaea D) endosymbiotic organisms