Any process that modulates the frequency, rate or extent of a circadian rhythm. A circadian rhythm is a biological process in an organism that recurs with a regularity of approximately 24 hours.

Any process that stops, prevents, or reduces the frequency, rate or extent of cellular DNA-templated transcription.

The process of restoring DNA after damage. Genomes are subject to damage by chemical and physical agents in the environment (e.g. UV and ionizing radiations, chemical mutagens, fungal and bacterial toxins, etc.) and by free radicals or alkylating agents endogenously generated in metabolism. DNA is also damaged because of errors during its replication. A variety of different DNA repair pathways have been reported that include direct reversal, base excision repair, nucleotide excision repair, photoreactivation, bypass, double-strand break repair pathway, and mismatch repair pathway.

Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a light stimulus, electromagnetic radiation of wavelengths classified as infrared, visible or ultraviolet light.

The sequence of reactions within a cell required to convert absorbed photons into a molecular signal.

Any biological process in an organism that recurs with a regularity of approximately 24 hours.

Any biological process in an organism that recurs with a regularity of approximately 24 hours.

Any biological process in an organism that recurs with a regularity of approximately 24 hours.

Any biological process in an organism that recurs with a regularity of approximately 24 hours.

Any biological process in an organism that recurs with a regularity of approximately 24 hours.

Any biological process in an organism that recurs with a regularity of approximately 24 hours.

Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of an ultraviolet radiation (UV light) stimulus. Ultraviolet radiation is electromagnetic radiation with a wavelength in the range of 10 to 380 nanometers.

Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a light stimulus, electromagnetic radiation of wavelengths classified as infrared, visible or ultraviolet light.

Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a light stimulus, electromagnetic radiation of wavelengths classified as infrared, visible or ultraviolet light.

The sequence of reactions within a cell required to convert absorbed photons from UV-A or blue light into a molecular signal; the UV-A, blue light range is defined as having a wavelength within the range of 315 to 400 nm.

Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a blue light stimulus. Blue light is electromagnetic radiation with a wavelength of between 440 and 500nm.

Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a blue light stimulus. Blue light is electromagnetic radiation with a wavelength of between 440 and 500nm.

The synchronization of a circadian rhythm to environmental time cues such as light.

The synchronization of a circadian rhythm to environmental time cues such as light.

The series of molecular signals initiated upon sensing of blue light by photoreceptor molecule, at a wavelength between 400nm and 470nm.

Any process that modulates the frequency, rate or extent of gene expression such that an expression pattern recurs with a regularity of approximately 24 hours.

Any process that modulates the frequency, rate or extent of gene expression such that an expression pattern recurs with a regularity of approximately 24 hours.

The directed movement of a motile cell or organism in response to gravity.

Any process that modulates the frequency, rate or extent of a circadian rhythm. A circadian rhythm is a biological process in an organism that recurs with a regularity of approximately 24 hours.

Any process that modulates the frequency, rate or extent of a circadian rhythm. A circadian rhythm is a biological process in an organism that recurs with a regularity of approximately 24 hours.

The synchronization of a circadian rhythm to photoperiod, the intermittent cycle of light (day) and dark (night).

The synchronization of a circadian rhythm to photoperiod, the intermittent cycle of light (day) and dark (night).

Any process that modulates the frequency, rate or extent of sleep; a readily reversible state of reduced awareness and metabolic activity that occurs periodically in many animals.

The rhythm of the locomotor activity of an organism during its 24 hour activity cycle.

Any process that stops, prevents, or reduces the frequency, rate or extent of cellular DNA-templated transcription.

The specific behavior of an organism that recurs with a regularity of approximately 24 hours.

The specific behavior of an organism that recurs with a regularity of approximately 24 hours.

The series of events required for an organism to receive a stimulus relating to a magnetic field, convert it to a molecular signal, and recognize and characterize the signal. Stimuli may be chemical, mechanical or electrical and interpreting these stimuli allows an organism to determine the orientation of a magnetic field. Magnetoreception also involves the perception of light; birds cannot orient without the presence of short wavelength (blue/green) light.

The series of events involved in magnetoception in which a light stimulus is received and converted into a molecular signal. Downstream processing of the light information in addition to other sensory data allows organisms to perceive the orientation of a magnetic field.

Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a magnetic stimulus.

Any process that results in a change in state or activity of a cell (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a light stimulus, electromagnetic radiation of wavelengths classified as infrared, visible or ultraviolet light.

A membrane-bounded organelle of eukaryotic cells in which chromosomes are housed and replicated. In most cells, the nucleus contains all of the cell's chromosomes except the organellar chromosomes, and is the site of RNA synthesis and processing. In some species, or in specialized cell types, RNA metabolism or DNA replication may be absent.

The region between the two lipid bilayers of the nuclear envelope; 20-40 nm wide.

All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.

A membrane-bounded organelle of eukaryotic cells in which chromosomes are housed and replicated. In most cells, the nucleus contains all of the cell's chromosomes except the organellar chromosomes, and is the site of RNA synthesis and processing. In some species, or in specialized cell types, RNA metabolism or DNA replication may be absent.

The region between the two lipid bilayers of the nuclear envelope; 20-40 nm wide.

That part of the nuclear content other than the chromosomes or the nucleolus.

All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.

The part of the cytoplasm that does not contain organelles but which does contain other particulate matter, such as protein complexes.

A stable assembly of two or more macromolecules, i.e. proteins, nucleic acids, carbohydrates or lipids, in which at least one component is a protein and the constituent parts function together.