Epigenetics from TEdEd

The epigenome is:

• The set of all mutations that occur in epidermic cells.

• The set of all epigenetic modifications in the genome of a cell.

• The set of all epistatic mutations in a cell.

• The part of the genome that is relevant for epidemiological studies.

Epigenetics describe the interaction of DNA with:

• Photons

• Molecules inside cells

• Contaminants

• Cells

What is true about two different cell types in the body?

• They have essentially the same genomes and epigenomes

• They have different genomes and epigenomes

• They have essentially the same genome, but different epigenomes

• They have essentially the same epigenome, but different genomes

What is true about epigenetic marks and cell division?

• Epigenetic marks of mother cells are generally maintained in daughter cells; however, they are susceptible to environmental influences

• Epigenetic marks never survive cell divisions

• Epigenetic marks of daughter cells are completely different from the epigenetic marks of mother cells

• Epigenetic marks in mother and daughter cells are always identical and cannot be influenced by environmental factors

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What is true regarding the role of epigenetics in biological processes?

• Epigenetic modifications always lead to diseases

• Epigenetic modifications are irrelevant for the functioning of a cell

• Epigenetic modifications are rare

• Epigenetic modifications are a normal process in the development or organisms

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DNA methylation is an epigenetic modification that is necessary for the proper functioning of cells. DNA methylation is the attachment of methyl groups (-CH3) to some cytosines in the genome. Since methyl groups come in dietary items (such as vitamins), what would happen if you often eat food poor in methyl groups?