BSC 444 Lecture Notes - Lecture 7: Guanosine Triphosphate, Tata Box, Rna Virus

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silvercicada472

28 Sep 2017

School

University of Alabama

Department

Biological Sciences

Course

BSC 444

Professor

Duffy

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Document Summary

Tata box, hepatitis b virus has 4 promoters and only 1 of them has a tata box) Transcription factors: bind specifically to promoter and enhancer sequences to control gene expression, some viruses produce their own, some cellular transcription factors can activate or repress transcription of viral genes. Is a complex of 13 proteins: binds to the tata box, one of those 13 proteins is the tata box binding protein, after tfiid binds the tata box, other general transcription factors and rna polymerase bind. Transcriptases: general term for an enzyme that carries out transcription (aka rna polymerase, viruses that replicate in the nucleus usually use a cellular transcriptase, viruses that replicate in the cytoplasm encode their own transcriptase. Rna virus transcriptases: rna virus need an rna-dependent rna polymerase (rdrp) to transcribe their genes, viruses in classes iii, iv and v encode their own transcriptases.

Related Questions

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.

BSC 444 Lecture Notes - Lecture 7: Guanosine Triphosphate, Tata Box, Rna Virus

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