During DNA Replication

question 84

Multiple Choice

During DNA replication,

• A) all methylation of the DNA is lost at the first round of replication.
• B) DNA polymerase is blocked by methyl groups, and methylated regions of the genome are therefore left uncopied.
• C) methylation of the DNA is maintained because methylation enzymes act at DNA sites where one strand is already methylated and thus correctly methylates daughter strands after replication.
• D) methylation of the DNA is maintained because DNA polymerase directly incorporates methylated nucleotides into the new strand opposite any methylated nucleotides in the template.
• E) methylated DNA is copied in the cytoplasm, and unmethylated DNA is copied in the nucleus.

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Definitions:

Triglycerides

A type of fat found in the blood, used by the body for energy; high levels can increase the risk of heart disease.

Fatty Acids

Essential, long-chain hydrocarbons found in fats and oils, important for energy and cell functions.

Polyunsaturated

A type of fat found in plants and fish that contains more than one unsaturated carbon bond in its molecules, known to be beneficial for heart health.

Kilocalorie Intake

The total amount of energy consumed in the form of food or drinks, measured in kilocalories (also known as Calories), crucial for maintaining body functions and energy levels.