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Biology
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13 Dec 2019

Which of the following metals can participate in the DNA polymerase catalysis (a) Potassium (b) Sodium (c) Calcium (d) Magnesium (e) Selenium

What is DNA gyrase? a. a bacterial Topoisomerase I b. b. a bacterial Topoisomerase II c. a bacterial helicase d. all of the above e. none of the above

The biochemistry of RNA synthesis in prokaryotes and eukaryotes is a. very different b. b. similar but more complicated in prokaryotes c. exactly the same d. similar but more complicated in eukaryotes e. none of the above

In base excision repair, which enzyme(s) cleave(s) the glycosidic bond of the altered nucleotide? (a) DNA glycosylase (b) AP endonuclease (c) DNA polymerase (d) DNA ligase

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17 Dec 2019
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Related questions

Q5. In eukaryotic organisms, there are three polymerases and each one binds to its own__________(one word), and produces a specific type of___________(one word) and the one that does mRNA transcription is (three words, please use the roman numberal format for the third "word")___ _______

Q6. Which of the following does NOT occur in prophase of mitosis

A. Recombination
B. mitotic spindle formation
C. chromosomes condense
D. All of the above happen in prophase of mitosis

Q7. Which of the following are required for DNA replication but NOT for Polymerase Chain Reaction?

dNTP (dATP, dGTP, dCTP, dTTP)

helicase

DNA polymerase I

SSBP

gyrase (topoisomerase)

primer (DNA or RNA)

DNA ligase

DNA polymerase III

Multiple choice questions:

1) For DNA Polymerase III to work, which of these components has to act first? (A. Conservative replication, B. Newly replicated strand, C.Primase, D. RNA, E.Mutation rate)

2) The double helix of DNA is wrapped about 1 3/4 times around which of these components? (A. Helicase, B. DNA polymerase III, C. DNA polymerase I, D.Nucleosome, E. DNA ligase)

3) Which strand is produced more rapidly? (A.Okazaki fragment, B. Lagging strand, C. Leading strand, D. 3' , E. 5' )

4) During DNA replication in the lagging strand there is production of this component? (A. Okazaki fragment, B. mRNA, C. tRNA, D. proteins, E. none of the above)

5) Which enzyme is used first to permit DNA polymerase III to begin replicating the 3' stand? (A. Conservative replication, B. Parental stand, C. Primase, D. RNA, E. Mutation rate)

6) Which enzyme unwraps the double helix? (A. Helicase, B. DNA polymerase III, C.DNA polymerase I, D. Nuclesome, E. DNA ligase)

Thanks for any feedback, want to verify my answers.

1 DNA sequences found in introns provide [A] amino acid sequence information.

[B] regulatory information.
[C] no known useful information.

[D] structure for the gene.
[E] alternative DNA splicing possibilities.

3. The TATA box is a(n)
[A] sequence close to the promoter region of many genes.
[B] square-shaped sequence.
[C] enhancer consensus sequence.
[D] activator sequence necessary for proper translation.
[E] None of the above

5. Regarding genes and gene expression, which of the following is not a difference between prokaryotes and eukaryotes
[A] Eukaryotic DNA does not contain a TATA box close to the initiation site as does prokaryotic DNA.

[B] In eukaryotes, RNA polymerase requires

'transcription factors'or initiation.

[C] Prokaryotic genes are often grouped together in

operons.

[D] In eukaryotes, the regulation of several genes at once requires common control elements in each of the genes.
[E] There is a diversity of eukaryotic polymerases that is reflected in the diversity of eukaryotic promoters.

10) In eukaryotic cells, a repressor

[A] is made of DNA.
[B] binds to the enhancer region to block transcription. [

C] is located both upstream and downstream from the promoter.
[D] binds to the operator to block RNA polymerase.

[E] binds to a silencer to reduce transcription rates.

Coordinated regulation of genes in eukaryotic cells [A] is the result of positioning the same regulatory sequence in front of each gene.
[B] results from all of those genes being under the control of one promoter.

[C] occurs because related genes all have the same

operons.
[D] occurs because enhancers cause DNA to bend.

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