Telomerase is a cellular reverse transcriptase (molecular motor) that adds new DNA onto the telomeres that are located at the ends of chromosomes . Telomeres consist of many kilobases of TTAGGG nucleotide repeats  and an associated protein complex, termed shelterin .
What is the relationship between telomeres and Telomerases quizlet?
Telomere shortening is the main cause of age-related break down of our cells. When telomeres get too short, our cells can no longer reproduce, which causes our tissues to degenerate and eventually die. Telomerase counteracts telomere shortening. An enzyme named telomerase adds bases to the ends of telomeres.
What are Telomerases and telomeres?
Abstract. Telomeres are the protective DNA-protein complexes found at the ends of eukaryotic chromosomes. Telomeric DNA consists of tandem repeats of a simple, often G-rich, sequence specified by the action of telomerase, and complete replication of telomeric DNA requires telomerase.
What is the proper relationship between telomeres and telomerase?
Some cells have the ability to reverse telomere shortening by expressing telomerase, an enzyme that extends the telomeres of chromosomes. Telomerase is an RNA-dependent DNA polymerase, meaning an enzyme that can make DNA using RNA as a template.
What is the relationship between telomeres telomerase and cancer?
Telomerase- inhibiting agents might cause cancer cells to lose their telomeres and die well before normal cells, with their much longer telomeres, lose enough of their telomeres to suffer any ill effects.
What are telomeres quizlet the ends of linear chromosomes?
Telomeres protect the ends of chromosomes from nucleases and help maintain the integrity of linear chromosomes.
What are telomeres what is their role quizlet?
Telomeres are “caps” at the ends of chromosomes that protect your genes from being eroded each time a cell divides. Specifically they are repeating bases and proteins at the tips of chromosomes.
Are telomeres non coding?
Telomeres are made of repetitive sequences of non-coding DNA that protect the chromosome from damage. Each time a cell divides, the telomeres become shorter. Eventually, the telomeres become so short that the cell can no longer divide.
Are telomeres shortened by telomerase?
Telomeres help prevent genes from being lost in this process. But this means that as your chromosomes replicate, your telomeres shorten. That’s where an enzyme called telomerase comes in. It’s found in certain cells and helps prevent too much wear and tear.
Why do telomeres get shorter with each round of DNA replication?
At each cell division, the telomeres shorten because of the incomplete replication of the linear DNA molecules by the conventional DNA polymerases. … This is specifically due to the resection and fill-in reaction during the synthesis of the telomere leading-strand [7,8].