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Telomere Definition. Telomeres are short tandem repeats of nucleotides at the ends of chromosomes. Let's break this definition down a bit. Nucleotides are the building blocks of DNA, which is the carrier of genetic information.
Telomerase RNA component. Telomerase RNA component, also known as TERC, is an ncRNA found in eukaryotes, that is a component of telomerase - The enzyme used to extend telomeres. TERC serves as a template for telomere replication (reverse transcription) by telomerase.