Gene transcriptions/Degenerate nucleotides/Quiz

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

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

You are free to take this quiz based on the degenerate nucleotides at any time.

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Quiz[edit]







  

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[edit]

  1. A1BG is transcribed by promoters that use degenerate nucleotides.

See also[edit]

External links[edit]

{{Anthropology resources}}{{Gene project}}{{Medicine resources}}{{Phosphate biochemistry}}