Which of the following is true of the trombone model of replication?
A. As Okazaki fragments are extended by Pol I, the loop in the DNA template grows.
B. Once an Okazaki fragment is completed, the ? clamp is ejected.
C. A loop is formed in one strand of the template DNA to allow 5'-3' synthesis of the leading strand.
D. When a new ? clamp is loaded, primase is triggered to synthesize a primer.
E. Binding of the polymerase core to a new primer/template complex triggers loading of the ? clamp.
B
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Horizontal gene transfer in Archaea
A) is infrequent in nature and therefore difficult to use for genetic studies in the laboratory. B) has not been documented, thus all genetic studies of archaea are done via genomic sequencing. C) frequently occurs in nature and has been used to perform genetic studies in the laboratory as well. D) frequently occurs in nature, but there are very few laboratory studies because archaea do not cause human disease.
The tangled mass or tissue-like aggregation in a mold is called a ________.
A. thallus B. hypha C. mycelium D. hyphae
Oyster reefs are usually oriented at right angles to the currents in estuaries. How do you think this could be an advantage to the oysters living in this community?
What will be an ideal response?
________ is a term that refers to similarities among various species that occur because the species are derived from a common ancestor.
A. Analogy B. Phylogeny C. Morphology D. Heterology E. Homology