In E. coli, which enzyme catalyzes the elongation of a new DNA strand in the ? direction?
A) primase
B) DNA ligase
C) DNA polymerase III
D) helicase
C
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Glacial ice core data can provide scientists with information about atmospheric CO2 levels for the last 500 million years of Earth's history
A. true B. false
The bacterium Alcaligenes eutrophus naturally produces polyhydroxybutyrate (PHB), a biodegradable thermoplastic. In 1992, Poirier, et al., reported in the journal Science that the two genes responsible for the production of PHB in bacteria had been introduced into the plant Arabidopsis thaliana, and it was demonstrated that the plants produced PHB. What type of vector was likely used to introduce the bacterial genes into the A. thaliana?
A. BAC. B. YAC. C. Ti plasmid. D. viral vector. E. BAC or YAC.
Sickle-cell anemia is caused by ____
a. an RNA error b. expansion mutation c. deletion mutation d. fragile X syndrome e. a base-pair substitution mutation
What structures in an animal's body would be the primary targets of genes for behavior? Check all that apply.
A. kidneys B. lungs C. brain D. muscles E. neurons