What Is the Difference Between the Trithorax (TrxG) and Polycomb

question 17

Multiple Choice

What is the difference between the trithorax (TrxG) and polycomb (PcG) complexes of proteins?

• A) TrxG proteins methylate lysine 27 on histone H3 while PcG complexes methylate lysine 4 on H3
• B) Methylation of lysine at position 4 on H3 results in silencing of gene expression
• C) TrxG complex proteins activate gene expression by methylating lysine 4 on H3, while PcG complex proteins repress gene expression by methylating lysine 27 on H3.
• D) Methylation of H3 on lysine 27 can result in activation of transcription

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Definitions:

Obedience

A form of social influence where an individual acts in response to a direct order from another individual, typically an authority figure.

Reactance

A psychological reaction to resist changes or propositions, motivated by a perceived threat to personal freedom or autonomy.

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Deindividuation

The reduction in personal identity and erosion of the sense of personal responsibility when one is part of a group.