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Gene transcriptions/Degenerate nucleotides/Quiz

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This diagram indicates the components of a nucleotide. Credit: Calibuon.

Degenerate nucleotides is a lecture as part of the gene transcription series.

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Quiz

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1 Yes or No, A degenerate nucleotide is a nucleotide that can perform the same function or yield the same output as a structurally different nucleotide.

Yes
No

2 The portion of the promoter in which a degenerate nucleotide is likely to be found is which of the following?

dispersed promoter
proximal promoter
downstream promoter
distal promoter
enhancer
focused promoter

3 Yes or No, Any six-membered aromatic heterocycle containing four carbon atoms, two nitrogen atoms and three double bonds is called a diazine.

Yes
No

4 Several promoter elements have been previously identified in eukaryotes, but those cannot account for transcription from most RNA polymerase II-transcribed

5 True or False, Some degenerate nucleotides are located in the distal promoter.

TRUE
FALSE

6 Which of the following is not a transcriptional characteristic of degenerate nucleotides?

located between nucleotides -8 and +2 relative to the transcriptional start site (+1)
G/A/T-G/C+1-G-T/C-G-G-G/A-A-G/C
in eukaryotes
TATA-less genes
a consensus sequence

7 Yes or No, A diazine in which the two nitrogen atoms are in the meta-positions is called a pyrimidine.

Yes
No

8 Complete the text:

A core promoter is the

portion of the gene promoter required to properly

gene

.

9 Yes or No, Any of a class of organic heterocyclic compounds composed of fused pyrimidine and imidazole rings is called a purine.

Yes
No

10 Complete the text:

Match up the type of promoter or promoter element with each of the possibilities below:
TATA box - A
initiator element - B
enhancers and inhibitors - C
downstream elements - D
General transcription factor II D - E
ATA box - F
downstream core promoter

.
includes the transcription start site

.
proximal promoter

.
distal promoter

.
core promoter

usually 25 nucleotides upstream

.

11 Which of the following are phenomena associated with degenerate nucleotides?

transcription of A1BG
directs activator-dependent but TFIID-independent transcription
TATA box-less promoters
initiator element
mediator dependence
distal promoter

12 True or False, Degenerate nucleotides are found in the promoter regions of at least 1% of human genes.

TRUE
FALSE


Hypotheses

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Main resource: Hypotheses
  1. A1BG is transcribed by promoters that use degenerate nucleotides.

See also

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[edit | edit source]

{{Anthropology resources}}

{{Medicine resources}}{{Phosphate biochemistry}}

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