Best answer: Why do prokaryotes have no need for telomeres?

The “end replication problem” is exclusive to linear chromosomes as circular chromosomes do not have ends lying without reach of DNA-polymerases. Most prokaryotes, relying on circular chromosomes, accordingly do not possess telomeres.

Why are telomeres needed in eukaryotes and not prokaryotes?

Eukaryotes have solved the end-replication problem by locating highly repeated DNA sequence at the end, or telomeres, of each linear chromosome. … In prokaryotes, the end-replication problem is solved by having circular DNA molecules as chromosomes. Another cause of telomere shortening is oxidative stress.

Why do bacteria not need telomeres and telomerase?

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.

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Why don t prokaryotic chromosomes have centromeres and telomeres?

Prokaryotic Chromosome

Prokaryotic cells typically have a single, circular chromosome located in the nucleoid. Since prokaryotic cells typically have only a single, circular chromosome, they can replicate faster than eukaryotic cells. … Each time a typical or somatic eukaryotic cell divides, the telomeres get shorter.

Why do eukaryotic chromosomes have telomeres and bacterial chromosome do not?

Unlike bacterial chromosomes, the chromosomes of eukaryotes are linear (rod-shaped), meaning that they have ends. These ends pose a problem for DNA replication. The DNA at the very end of the chromosome cannot be fully copied in each round of replication, resulting in a slow, gradual shortening of the chromosome.

What are the telomeres and why are they important?

Telomeres, the specific DNA–protein structures found at both ends of each chromosome, protect genome from nucleolytic degradation, unnecessary recombination, repair, and interchromosomal fusion. Telomeres therefore play a vital role in preserving the information in our genome.

Why do somatic cells not have telomerase?

Telomerase activity is absent in most normal human somatic cells because of the lack of expression of TERT; TERC is usually present. … The absence of telomerase activity in most human somatic cells results in telomere shortening during aging.

Are telomeres present in bacteria?

Although much less commonly appreciated, linear chromosomes and telomeres are not exclusive to the eukaryotic kingdom; they can be found in a number of bacteria, including Streptomyces, Borrelia, Rhodococcus, etc.

Why are bacteria not dependent on telomerase for complete DNA replication?

Why are bacteria not dependent on telomerase for complete DNA replication? Telomerase allows for the accurate reparation of single-stranded nicks in DNA, and bacteria have only double-stranded breaks during replication.

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Do E coli have telomeres?

Each eukaryotic chromosome consists of a single molecule of DNA associated with a variety of proteins. (This is in contrast to such bacterial chromosomes as that in E. … coli that is a closed circle, i.e. has no ends.)

Do prokaryotes and eukaryotes have telomeres?

Telomeres are only present in eukaryotes. This is the case because eukaryotes are the only type of cell that contains linear DNA. There are telomeres on each end of the chromosomes within the nucleus of these cells. Prokaryotes, on the other hand, have a single circular strand of DNA within a nucleoid.

Why do prokaryotes only have one chromosome?

Prokaryotic cells may have only one chromosome, but that one chromosome is a very long DNA molecule that must be condensed to fit inside a tiny space. In a eukaryotic cell, DNA wraps around clusters of histone proteins. However, most prokaryotic cells don’t use histones to help with DNA storage.

Why do eukaryotic cells have telomeres?

Telomeres are repetitive nucleotide sequences at each end of chromosomes. Their function is to protect the ends of the chromosomes from deterioration or fusion to other chromosomes during cell division.

Why are there no telomeres in bacteria?

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

Why do prokaryotic cells divide faster than eukaryotic cells?

The answer is cell division. After cells grow to their maximum size, they divide into two new cells. … Cell division is simpler in prokaryotes than eukaryotes because prokaryotic cells themselves are simpler. Prokaryotic cells have a single circular chromosome, no nucleus, and few other cell structures.

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What is the main difference between prokaryotic cell and eukaryotic cells?

The primary distinction between these two types of organisms is that eukaryotic cells have a membrane-bound nucleus and prokaryotic cells do not.