Riboswitches Are Folded RNAs That Act as Switches to Turn

question 62

Multiple Choice

Riboswitches are folded RNAs that act as switches to turn protein synthesis on or off in response to ________.

• A) specific codes from the DNA
• B) changes in the environment
• C) the presence or absence of ubiquitins
• D) specific tRNAs

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Definitions:

Pleistocene

The geological epoch lasting from about 2.6 million to 11,700 years ago, characterized by the last period of significant ice ages.

Triassic

A geologic period and system that spans from about 252 to 201 million years ago, marking the beginning of the Mesozoic Era.

Carboniferous

The Carboniferous is a geologic period and system that extends from about 359 to 299 million years ago, known for its vast coal deposits.

Ordovician

A geologic period and system of the Paleozoic Era, following the Cambrian and preceding the Silurian, marked by significant diversification of life.