Exam 7: Archael and Eukaryotic Molecular Biology

________is the enzyme that introduces positive supercoils into DNA that is found in the________domain(s).

The guanine- rich sequence that can base pair with the 3' end of a complementary RNA present in telomerase is found on the________ strand of DNA.

Regulation of transcription in Archaea is more similar to that which occurs in eukaryotes than in bacteria.

Archaeal introns are excised by

Explain the necessity and function of telomeres and telomerase.

All organisms possess multiple DNA polymerases in part due to their functional diversity that all cells require.

Compare and contrast the activities of "dicers" and "slicers."

The antibiotic rifampicin inhibits RNA polymerase from which domain?

The complex of DNA plus histones is known as _________ and when highly condensed is called________ .

Prokaryotes have almost no introns. What is the significance of this?

Protein- encoding genes are often split into two or more coding regions called________ and noncoding regions known as________ .

Which statement is TRUE?

Monocistronic mRNA occurs in domain________ , while polycistronic mRNA occurs in domain________ .

Suppose you are comparing the protein- encoding DNA from two species. In one species, 92% of the DNA encodes proteins, while in the second species, only 7.5% of the DNA encodes proteins. To what domain does each species belong? Explain your answer fully.

Histones are universally present in prokaryotic cells.

Explain why a mutation in the gene that encodes telomerase would be a lethal mutation.

The________ is ________that contains both introns and exons.

Archaea contain ________RNA polymerase(s), which have roughly three times more subunits than those found in ________.

Bacteria use DNA polymerases of family C as their _________ , whereas DNA polymerases of families A and B are used mostly in _________ .

The assemblage of proteins that serve as a binding site for spindle fibers and bind to chromosomal DNA at the centromere region are called