Small RNAs Can Regulate Gene Expression

question 55

Multiple Choice

Small RNAs can regulate gene expression.One type,called micro RNA (miRNA) ,acts by binding directly to

• A)mRNA to prevent translation.
• B)tRNA to prevent transcription.
• C)mRNA to prevent transcription.
• D)tRNA to prevent translation.

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Definitions:

Lubricated

The state of having applied a substance to lessen friction between surfaces.

Sildenafil (Viagra)

A medication commonly used to treat erectile dysfunction by increasing blood flow to the penis during sexual stimulation.

Sympathetic Nervous System

Part of the autonomic nervous system that prepares the body for action by activating the 'fight or flight' response.

Testosterone

A steroid hormone that plays a key role in the development of male reproductive tissues as well as promoting secondary sexual characteristics.