Epigenetics

Last updated: 21/08/2021

AQA A-Level Biology Gene expression is controlled by a number of features Epigenetics

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Question 1 of 25

1. Question
The branch of biology which studies the causal interactions between genes and their products is called ————
- Epigenetics
- Genetics
- Mutations
- Biotechnology
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Question 2 of 25

2. Question
Epigenetics ————–
- The changes alter the physical structure of DNA
- The changes alter the physical structure of RNA
- The changes alter the physical structure of mRNA
- The changes alter the physical structure of RNAi
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Question 3 of 25

3. Question
Which one is the example of epigenetics?
- DNA methylation
- RNA methylation
- mRNA methylation
- None of these
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Question 4 of 25

4. Question
Epigenetics is most concerned with
- The expression of a particular gene as influenced by external inputs
- Changes in a person’s genotype resulting from environmental influences
- Environmental influences on gene expression over experiential influences.
- The heritability of genotypes that have been altered over multiple generations.
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Question 5 of 25

5. Question
In human DNA, which nucleotide base is methylated at the 5′ position?
- Cytosine
- Adenosine
- Thymine
- Guanine
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Question 6 of 25

6. Question
What enzyme is responsible for copying methylation marks from the parental to the daughter strand of DNA during replication?
- DNMT1
- DNMT3a
- DNMT3b
- DNMT3L
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Question 7 of 25

7. Question
What are histones?
- Proteins
- Lipids
- Carbohydrates
- Nucleotides
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Question 8 of 25

8. Question
Which of the following is not a non-coding RNA?
- mRNA
- tRNA
- rRNA
- miRNA
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Question 9 of 25

9. Question
The term epigenome is derived from ———– word.
- Greek
- Latin
- Italian
- Swedish
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Question 10 of 25

10. Question
The word Epigenome, Epi which literally means ——— genome
- Above
- Below
- Inside
- None of these
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Question 11 of 25

11. Question
What is each DNA histone complex called?
- Nucleosome
- Chromotin
- Chromotids
- Chromosomes
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Question 12 of 25

12. Question
What is the function of the histone protein complex?
- Provides structural support to a chromosome.
- Provides structural support to a cell
- Provides structural support to a cytoplasm
- Provides structural support to a muscle
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Question 13 of 25

13. Question
How many types of histone?
- Four
- Three
- Two
- Five
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Question 14 of 25

14. Question
The study of making chemical modifications to DNA is also called ————–
- Epigenetics
- Genetics
- Mutations
- Biotechnology
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Question 15 of 25

15. Question
Gene imprinting involves ————
- DNA Methylation
- DNA phosphorylation
- DNA oxidation
- DNA glycosylation
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Question 16 of 25

16. Question
Acetylation of histones increases transcription of genes due to ———-
- It loosens the DNA histone-complex thus making it accessible to RNA polymerase
- Increase in the DNA histone interactions
- It induces DNA blending
- The acetyl groups are recognizable by RNA polymerase
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Question 17 of 25

17. Question
DNA methylation can be measured using ———————
- Chromatin Immunoprecipitation
- Chromosome Immunoprecipitation
- Nucleosome Immunoprecipitation
- None of these
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Question 18 of 25

18. Question
How many types of epigenetics modifications?
- Two
- Three
- Four
- Five
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Question 19 of 25

19. Question
The disease may be caused by direct changes in ———— marks
- Epigenetics
- oncogenes
- Mutations
- Genetics
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Question 20 of 25

20. Question
Parental imprinting is an example of ————
- Epigenetic inheritance
- Translocation
- Epigenetic errors
- None of these
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Question 21 of 25

21. Question
When DNA is methylated, nearby histones are ———-, resulting in compounded inhibitory effects on transcription
- Deacetylated
- Acetylated
- Etylated
- None of these
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Question 22 of 25

22. Question
involves the addition of a methyl or hydroxymethyl group to bases in the DNA sequence.
- DNA methylation
- Histone acetylation
- DNA acetylation
- Histone methylation
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Question 23 of 25

23. Question
What is the association between obesity and epigenetic age?
- Epigenetic age is higher among people with obesity.
- There is no association between obesity and epigenetic age
- Epigenetic age is lower among people with obesity.
- None of these
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Question 24 of 25

24. Question
What is the name of the globular protein around which DNA is wrapped in a chromosome?
- Histone
- Chromatin
- Nucleosome
- Nucleolus
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Question 25 of 25

25. Question
What is a nucleosome?
- A repeating unit of chromatin
- A membrane-bound organelle that contains epigenetic information
- A complex of proteins that controls the nuclear import
- Non-chromosomal DNA that is free-floating in the cytosol
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