Gene transcriptions/Degenerate nucleotides/Quiz

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

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

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

To improve your score, read and study the lecture, the links contained within, listed under See also, External links, and in the {{gene project}} template. This should give you adequate background to get 100 %.

As a "learning by doing" resource, this quiz helps you to assess your knowledge and understanding of the information, and it is a quiz you may take over and over as a learning resource to improve your knowledge, understanding, test-taking skills, and your score.

Suggestion: Have the lecture available in a separate window.

To master the information and use only your memory while taking the quiz, try rewriting the information from more familiar points of view, or be creative with association.

Enjoy learning by doing!

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.


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
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.


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.


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)
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.


8 Complete the text:

A core promoter is the

portion of the gene promoter required to properly



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


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.


Hypotheses edit

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

See also edit

External links edit

{{Anthropology resources}}

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