An RNA-dependent DNA polymerase that carries the RNA template with it to synthesize repeats at the 3'-ends of chromosomes is called:

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Telomerase is the enzyme that carries out the synthesis of repetitive DNA sequences at the end of chromosomes, known as telomeres. It is an RNA-dependent DNA polymerase because it uses a small RNA as a template to extend the 3' end of the chromosome. The other choices, such as DNA ligase, DNA polymerase γ, DNA polymerase β, and topoisomerase, are not involved in telomere synthesis. DNA ligase seals the nicks in the phosphodiester backbone of DNA. DNA polymerase γ is the polymerase that replicates mitochondrial DNA. DNA polymerase β is involved in DNA repair. Topoisomerase relieves DNA tension during replication and transcription.

An RNA-Dependent DNA Polymerase That Carries the RNA Template with It