circadian rhythm is the gene product molecular function
Circadian rhythm sleep disorders are dyssomnias resulting from a discrepancy between the person's daily sleep/wake patterns and demands of social activities, shift work, or travel.
The rhythmic repetition of certain phenomena in living organisms at about the same time each day.
Yes
That controls sleep and wakefulness. It is the body's natural clock. It is a biological rhythm or cycle of approximately 24 hours.