When the bacteria Vibrio cholera resides in the human gut they produce an activa
ID: 259678 • Letter: W
Question
When the bacteria Vibrio cholera resides in the human gut they produce an activator protein that triggers the simultaneous expression of at least 13 genes/operons that cause diarrhea. This is an example of _____.
a) global gene regulation
b) constitutive gene expression
c) translational control
d) negative control
e) none of the options are correct
Which of the following is not a mechanism of chromatin remodeling:
a) DNA methylation
b) Histone modification
c) Chromatin-remodeling complexes
d) Alternative spicing
c) all of the options are correct
Actively transcribed genes will have _____ level of methylation and the chromatin will be _____.
a) high…..condensed
b) low…..condensed
c) high…..decondensed
d) low…..decondensed
_____ are enzymes that add acetyl groups to positively charged amino acids of histones and cause chromatin to _____.
a) HATs (histone acetyltransferases)….. condense
b) HATs…..decondense
c) HDACs (histone deacetylases)……condense
d) HDACs…..decondense
A liver cell can pass on its patterns of DNA methylation and histone acetylation to its daughter cells. This is an example of _____.
a) Transient inheritance
b) Passive inheritance
c) epigenetic inheritance
d) DNA inheritance
e) chromosomal inheritance
Explanation / Answer
When the bacteria Vibrio cholera resides in the human gut they produce an activator protein that triggers the simultaneous expression of at least 13 genes/operons that cause diarrhea. This is an example of translationak control.
Which of the following is not mechanism of chromatin remodeling
Answer is D alternative splicing
Actively transcribed genes will have low level of methylation and the chromatin will be decondensed.
HAT ( histone acetl transferases ) are enzymes that add acetyl groups to positively charged amino acids of histones and causes them to relax or decondense.
liver cell can pass on its patterns of DNA methylation and histone acetylation to its daughter cells. This is an example of epigenetic inheritance.
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