Epigenetics

How many chromosomes does a human have in total?

• 23

• 46

• 92

• 100

What is chromatin?

• A type of cell

• A type of protein

• A complex of DNA and histone proteins

• A type of gene

What is the main function of nucleosomes?

• Produce energy

• Regulate gene expression

• Transport oxygen

• Synthesize proteins

What is DNA methylation?

• The addition of a methyl group to a cytosine-guanine sequence

• The removal of a methyl group from a cytosine-guanine sequence

• The addition of an acetyl group to a cytosine-guanine sequence

• The removal of an acetyl group from a cytosine-guanine sequence

What does the trimethylation of histone 3 K9 correlate with?

• With the repression of transcription

• With the activation of transcription

• With the synthesis of proteins

• With cell division

What is the function of histone acetylation?

• To condense chromatin structure

• To relax chromatin structure and promote transcription

• To degrade histone proteins

• To initiate DNA replication

What is the function of telomeres?

• To protect the ends of chromosomes from deterioration

• To initiate DNA replication

• To code for proteins

• To regulate gene expression