Which Statement About Circadian Rhythms Is False

question 188

Multiple Choice

Which statement about circadian rhythms is false?

• A) Animals kept in constant darkness at the same temperature continue to show daily sleep cycles.
• B) In mammals, the suprachiasmatic nuclei (SCN) are the master circadian clock.
• C) Daily rhythms are entrained to the environmental cycle of light and dark.
• D) Free-running describes the circadian period length in constant conditions.
• E) When long-day adult hamsters made arrhythmic by destruction of their suprachiasmatic nuclei (SCN) subsequently received SCN tissue from short-day fetuses, their circadian rhythms were restored, and the restored rhythms had long-day lengths.

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Definitions:

Ammonia

A compound of hydrogen and nitrogen (NH3) characterized by a sharp smell, used in many industrial and cleaning products, and present in the metabolism of organisms.

Lewis Structure

Visual representations that demonstrate the connections between molecule atoms and indicate the presence of unshared electron pairs.

Propane

A three-carbon alkane with the molecular formula C3H8, commonly used as a fuel in heating and cooking appliances.

Condensed

A state of matter that is characterized by particles being in close proximity, typically referring to liquids and solids.