Best answer: Are telomeres found in bacteria and eukaryotes?


Are telomeres found in prokaryotes and eukaryotes?

Eukaryotes have solved the end-replication problem by locating highly repeated DNA sequence at the end, or telomeres, of each linear chromosome. … Most prokaryotes with circular genome do not have telomeres.

Why are telomeres not found in bacterial DNA?

Bacteria do not have the end-replication problem, because its DNA is circular. In eukaryotes, the chromosome ends are called telomeres which have at least two functions: to protect chromosomes from fusing with each other. to solve the end-replication problem.

Why are telomeres needed in eukaryotes and not prokaryotes?

Unlike prokaryotic chromosomes, eukaryotic chromosomes are linear. … The ends of the linear chromosomes are known as telomeres, which have repetitive sequences that code for no particular gene. In a way, these telomeres protect the genes from getting deleted as cells continue to divide.

Why do prokaryotes have no need for telomerase?

Bacteria don’t need telomerase because their chromosomes don’t have telomeres. Most bacterial chromosomes are circular, meaning they have no end.

What do telomeres do in eukaryotes?

Telomeres are the physical ends of eukaryotic chromosomes. They protect chromosome ends from DNA degradation, recombination, and DNA end fusions, and they are important for nuclear architecture. Telomeres provide a mechanism for their replication by semiconservative DNA replication and length maintenance by telomerase.

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Is telomerase active in all cells?

Telomerase activity is absent in most normal human somatic cells because of the lack of expression of TERT; TERC is usually present. On the other hand most mouse cells have telomerase activity (Blasco, 2005). … The absence of telomerase activity in most human somatic cells results in telomere shortening during aging.

Why telomerase is an important enzyme in eukaryotes?

Telomeres are needed to maintain the ends of chromosomes and sustain chromosome stability in eukaryotic cells. Telomeres loss their noncoding DNA sequences in the erosion that happens during DNA replication in each cell cycle. They do this to protect the genetic information in the chromosomes [42, 43].