Welcome to the Quiz!
This quiz contains 11 questions from a mix of 1 subtopics.
What is the process of adding methyl groups to histones called?
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What is the process of adding acetyl groups to histones called?
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What is the result of phosphorylation of histones?
a looser DNA coil and decreased transcription
a tighter DNA coil and increased transcription
a tighter DNA coil and decreased transcription
a looser DNA coil and increased transcription
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How does phosphorylation affect histones?
it changes their charge to neutral
it increases their positive charge
it decreases their positive charge
it does not affect their charge
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What does methylation of histones result in?
a tighter DNA coil and increased transcription
a tighter DNA coil and decreased transcription
a looser DNA coil and increased transcription
a looser DNA coil and decreased transcription
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What does acetylation of histones result in?
a tighter DNA coil and increased transcription
a looser DNA coil and decreased transcription
a looser DNA coil and increased transcription
a tighter DNA coil and decreased transcription
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What is epigenetic regulation?
changes in protein synthesis that do not alter the underlying DNA sequence
changes in protein synthesis that alter the underlying DNA sequence
changes in gene expression that do not alter the underlying DNA sequence
changes in gene expression that alter the underlying DNA sequence
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What form of chromatin allows easy access for RNA polymerase?
neither heterochromatin nor euchromatin
both heterochromatin and euchromatin
euchromatin
heterochromatin
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What are transcription factors?
proteins that bind to RNA sequences
proteins that bind to any DNA sequence
proteins that bind to specific RNA sequences
proteins that bind to specific DNA sequences
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What role do transcription factors play in gene expression?
they control the translation of mRNA into proteins
they control the replication of DNA
they control the transcription of genes into mRNA
they have no role
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What happens when a gene is 'switched off'?
transcription factors cannot bind to DNA
transcription factors bind to DNA
transcription factors bind to RNA
transcription factors cannot bind to RNA
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