Examlex
Which of the following is considered an important function of the skin?
Protein
Large molecules composed of one or more long chains of amino acids, essential for the structure, function, and regulation of the body's cells, tissues, and organs.
Cyclic AMP
Cyclic AMP (cAMP) is a second messenger important in many biological processes, including the regulation of metabolism, gene transcription, and cell signaling.
Nucleotide
The basic building block of nucleic acids, such as DNA and RNA, consisting of a sugar, phosphate group, and nitrogenous base.
Purines
Nitrogenous bases with carbon and nitrogen atoms in two attached rings (e.g., adenine and guanine); components of nucleic acids, ATP, GTP, NAD1, and certain other biologically active substances. Compare with pyrimidines.
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