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:

Puberty

The phase of human development during which children become capable of reproduction, marked by hormonal changes and physical development.

Endocrine Gland

Glands of the endocrine system that release hormones directly into the bloodstream.

Melanocyte-Stimulating Hormone

Melanocyte-Stimulating Hormone is a peptide hormone involved in stimulating melanocytes to produce melanin, affecting skin and hair color.

Skin Color

The pigmentation of someone's skin, largely determined by genetic inheritance and exposure to sunlight.