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Epigenetics Flashcards | StudBud
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Epigenetics
Epigenetics
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A-level biology epigenetics basics
Flashcards
10 cards
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Practice quiz
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Questions
10
Answers
1
Acetylation is the addition of a n acetyl group to the DNA strand
False
True
2
In the rat experiment, rats that had more attention form their mother became less stressed as adults
True
False
3
Methylation is the addition of a methyl group to the DNA strand
True
False
4
What is epigenetics?
Changes in how DNA is made
Temporary changes in gene expression
Changes in the base sequence of DNA
Heritable changes in DNA function
5
Which of the following can cause epigenetic changes?
Mutations
Stress
Smoking
All of them
6
When can changes in acetylation or methylation occur?
Any time during your life
In a foetus during pregnancy
Only in cells that form gametes
Cell division
7
Increased methylation causes....
Depends where it it located
Increased gene expression
Decreased gene expression
8
What affect does increased acetylation have on gene expression
DNA is more tightly coiled so gene expression is increased
DNA is more loosely coiled so gene expression is decreased
DNA is more loosely coiled so gene expression is increased
DNA is more tightly coiled so gene expression is decreased
9
What is the name of the protein that DNA is associated with to form chromatin?
Histones
Histamine
Centrioles
Centromere
10
Where is the methyl group added on the DNA?
Cytosine base
At the promoter region
CpG site
Sugar phosphate backbone
