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Telomeres are located at the ends of chromosomes. They consist of repetitive DNA sequences that protect the chromosome from deterioration and prevent it from fusing with neighboring chromosomes. This protective role is crucial for maintaining genomic stability during cell division. Over time, telomeres shorten with each division, which is associated with aging and cellular senescence.
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Heterochromatic regions at the ends of chromosomes are?
telomeres, which are essential for maintaining the stability and integrity of the chromosome. They protect the chromosome ends from degradation and prevent them from fusing with other chromosomes. Telomeres also play a role in regulating the cell's lifespan and preventing chromosomal abnormalities.
Is a repetitive sequence at the end of each human chromosome?
Yes, each human chromosome has a repetitive sequence at its ends called telomeres. These telomeres protect the chromosome from degradation and prevent it from fusing with neighboring chromosomes. As cells divide, telomeres shorten, which is associated with aging and limits the number of times a cell can divide. When telomeres become critically short, the cell may enter a state of senescence or undergo apoptosis.
What are the end of the chromosome called?
The ends of chromosomes are called telomeres. Telomeres help protect the ends of the chromosome from deteriorating or fusing with other chromosomes during cell division. They also play a role in determining the lifespan of a cell.
Do centromeres and telomeres encode special gene products?
Centromeres and telomeres do not encode specific gene products. Centromeres are responsible for proper chromosome segregation during cell division, while telomeres protect the ends of chromosomes from deteriorating or fusing with neighboring chromosomes. These structures are composed of specific DNA sequences and associated proteins that play essential roles in chromosome structure and function.
Ends of chromosomes that get shorter each time a cell divides?
Telomeres are the ends of chromosomes that shorten with each cell division due to the replication process not reaching the very end of the DNA strand. This shortening eventually leads to cellular senescence and eventually cell death. Telomeres play a crucial role in protecting the DNA and maintaining chromosome stability.
Heterochromatic regions at the ends of chromosomes are?
telomeres, which are essential for maintaining the stability and integrity of the chromosome. They protect the chromosome ends from degradation and prevent them from fusing with other chromosomes. Telomeres also play a role in regulating the cell's lifespan and preventing chromosomal abnormalities.
Is a repetitive sequence at the end of each human chromosome?
Yes, each human chromosome has a repetitive sequence at its ends called telomeres. These telomeres protect the chromosome from degradation and prevent it from fusing with neighboring chromosomes. As cells divide, telomeres shorten, which is associated with aging and limits the number of times a cell can divide. When telomeres become critically short, the cell may enter a state of senescence or undergo apoptosis.
Why is telomeric chromosome unstable?
Actually the genes on a chromosome closest to the telomeres are the most unstable because they can unravel.
What are the end of the chromosome called?
The ends of chromosomes are called telomeres. Telomeres help protect the ends of the chromosome from deteriorating or fusing with other chromosomes during cell division. They also play a role in determining the lifespan of a cell.
Eukaryotic Chromosome are formed primarily of what two molecules?
Eukaryotic chromosomes are formed primarily of chromatids and telomeres
Do centromeres and telomeres encode special gene products?
Centromeres and telomeres do not encode specific gene products. Centromeres are responsible for proper chromosome segregation during cell division, while telomeres protect the ends of chromosomes from deteriorating or fusing with neighboring chromosomes. These structures are composed of specific DNA sequences and associated proteins that play essential roles in chromosome structure and function.
How are telomeres important for preserving eukaryotic genes?
Telomeres solve the end replication problem by extending the 3' end of the chromosome. Without them, the 3' end can't be replicated since replication is 5' to 3'.
Ends of chromosomes that get shorter each time a cell divides?
Telomeres are the ends of chromosomes that shorten with each cell division due to the replication process not reaching the very end of the DNA strand. This shortening eventually leads to cellular senescence and eventually cell death. Telomeres play a crucial role in protecting the DNA and maintaining chromosome stability.
In a diploid cell in which 2n equals 14 how many telomeres are there in each of the follow phases of the cell cycle a. G1 b. G2 c. mitotic prophase d. mitotic telophase?
There are two telomeres for each chromosome, so you need to figure out how many chromosomes there are at each stage and multiply that by two. G1-- growth phase: 14 chromosomes = 28 telomeres G2-- growth phase after replication in S phase: 28 chromosomes= 56 telomeres Mitotic Prophase-- before cell division, nuclear membrane disappears: 28 chromosomes= 56 telomeres Mitotic telophase-- nuclei separate: 14 chromosomes = 28 telomeres
What is the name of the string of repetitive DNA at the tip of each chromosome in the body?
The repetitive DNA at the tip of each chromosome is called a telomere. Telomeres protect the chromosome from deterioration or fusion with neighboring chromosomes, and they shorten with each cell division. This shortening is linked to aging and disease.
Purpose of a telomere?
A telomere is the structure at each end of a chromosome. It consists of an area of highly repeated DNA combined with protein. Its main function is to protect the end of the chromosome.Telomeres are instrumental in enabling the cells to divide and replicate. But as we grow older these tips wear out and shorten much like the shoelace caps. When they get too short, we get diseases and die. The three Nobel Prize winners found this as they were looking for a cure for cancer.
Does the telomeres serve as a mitotic clock?
Yes, telomeres serve as a mitotic clock by shortening with each cell division. They protect chromosome ends from deterioration or fusion with neighboring chromosomes, but as cells divide, the telomeres become progressively shorter. Once they reach a critical length, the cell can no longer divide and may enter senescence or undergo apoptosis. This mechanism plays a crucial role in regulating cellular lifespan and aging.
