The Unpacking of Heterochromatin into Euchromatin Does Not Immediately Result

question 28

Multiple Choice

The unpacking of heterochromatin into euchromatin does not immediately result in DNA transcription because

• A) Barr bodies are still present.
• B) histones still block the binding of RNA polymerase to the promoter.
• C) euchromatin is always transcriptionally inactive.
• D) transcription factors still block the binding of RNA polymerase to the promoter.
• E) heterochromatin contains DNA with accessible promoters.

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Definitions:

Microelectrodes

Small electrodes used to record electrical activity or deliver electrical stimulation in biological tissue.

Giant Axons

Unusually large nerve fibers that facilitate rapid transmission of electrical impulses, especially notable in specific animal species.

Squid

A cephalopod mollusk known for its elongated body, large eyes, and extraordinary ability to rapidly change color and texture.

Jet-Propel

To move or be propelled forward by jets of liquid or gas, often used in the context of jet engines or aquatic propulsion mechanisms.