Which of the following statements is false when comparing replication in eukaryotes and bacteria?
A. Both bacteria and eukaryotes use an ATP-dependent DNA ligase.
B. In eukaryotes, replication is initiated by a number of proteins called the "origin recognition complex," whereas in bacteria, a single protein, DNaA, binds to the origin.
C. Primers are made by the same RNA polymerase enzyme (primase) in both bacteria and eukaryotes.
D. In bacteria the leading and lagging strands are made by the same polymerase, whereas in eukaryotes, the strands are made by different polymerases.
Answer: C
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Which statements about the Lake Victoria cichlid fishes are true? Check all that apply.
__X__ The adaptive radiation of the estimated 300 species of cichlid fish was very rapid and took place during the last 200,000 years. _____ The adaptive radiation of the Lake Victoria cichlids may have resulted from a key evolutionary innovation. _____ Speciation of the Lake Victoria cichlids was mainly sympatric. _____ The diversity of the Lake Victoria cichlids continues today because the lake is devoid of predators. _____ Many of the Lake Victoria cichlids have very specialized adaptations that allow them to occupy diverse habitats within the lake.
This is a water-soluble hormone derived from the nervous system that regulates blood volume and blood pressure.
A. antidiuretic hormone B. aldosterone C. cortisol D. oxytocin E. adrenocorticotropic hormone
Recently, microorganisms have been used to clean up oil spills in the oceans of the world. This is an example of
A) agricultural microbiology. B) food microbiology. C) bioremediation. D) epidemiology.
The virulence factor 'Kanagawa hemolysin' is produced by
A. Vibrio cholerae B. Vibrio parahaemolyticus C. Vibrio vulnificus D. None of the above E. All of the above