What Causes DNA to Uncoil During Transcription

question 176

Multiple Choice

What causes DNA to uncoil during transcription?

• A) binding of tRNA to the initiator codon
• B) binding of helicase to the DNA
• C) binding of DNA polymerase to the leader sequence
• D) binding of RNA polymerase to the promoter sequence
• E) binding of ubiquitin to the DNA

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Definitions:

Neuroplasticity

The brain's ability to reorganize itself by forming new neural connections throughout life, allowing the neurons (nerve cells) in the brain to compensate for injury and disease and to adjust their activities in response to new situations or changes in their environment.

Absolutely Refractory

The state of an axon in the repolarizing period, during which a new action potential cannot be elicited (with some exceptions) because gate 2 of sodium channels, which are not voltage-activated, are closed.

Relatively Refractory

The state of an axon in the later phase of an action potential, during which higher-intensity electrical current is required to produce another action potential; a phase during which potassium channels are still open.

Periods

In geology, divisions of geological time; in biology, typically refers to the menstrual cycle, a regular natural change that occurs in the reproductive system.