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What are tips of chromosomes called?
The tips of chromosomes are called telomeres. They are repetitive sequences of DNA that protect the ends of chromosomes from deterioration or fusion with neighboring chromosomes. Telomeres play a crucial role in cellular aging and stability, as they shorten with each cell division. When telomeres become too short, the cell can undergo senescence or apoptosis.
What term describes a structure that protects the ends of a chromosome?
Telomere. Telomeres are repetitive DNA sequences located at the ends of chromosomes that help protect them from degradation and prevent the loss of genetic information during cell division.
How are telomeres replicated?
Telomeres are replicated by an enzyme called telomerase. Telomerase adds repetitive DNA sequences to the ends of chromosomes, counteracting the shortening that occurs during DNA replication. This process helps maintain the length of telomeres and preserve cell division capacity.
Why does telomerase need to have a built-in template for DNA synthesis?
Telomerase needs a built-in template for DNA synthesis because it uses this template to extend the telomeres, the repetitive DNA sequences at the ends of chromosomes. The telomerase enzyme adds specific DNA sequences to the ends of chromosomes to compensate for the natural loss of DNA that occurs during cell division. The built-in template guides the addition of these DNA sequences to maintain chromosome stability.
What are telomeres made of?
Telomeres are made of repetitive DNA sequences and associated proteins. The DNA part typically consists of a repeating sequence like TTAGGG in vertebrates. These structures cap the ends of chromosomes, protecting them from degradation and maintaining chromosomal stability.
What are tips of chromosomes called?
The tips of chromosomes are called telomeres. They are repetitive sequences of DNA that protect the ends of chromosomes from deterioration or fusion with neighboring chromosomes. Telomeres play a crucial role in cellular aging and stability, as they shorten with each cell division. When telomeres become too short, the cell can undergo senescence or apoptosis.
Are telomeres the regions of chromosomes that code for protein?
No, telomeres are not regions of chromosomes that code for proteins. Telomeres are repetitive sequences of DNA found at the ends of chromosomes that help protect them from deterioration and prevent the loss of genetic information during cell division.
What term describes a structure that protects the ends of a chromosome?
Telomere. Telomeres are repetitive DNA sequences located at the ends of chromosomes that help protect them from degradation and prevent the loss of genetic information during cell division.
How are telomeres replicated?
Telomeres are replicated by an enzyme called telomerase. Telomerase adds repetitive DNA sequences to the ends of chromosomes, counteracting the shortening that occurs during DNA replication. This process helps maintain the length of telomeres and preserve cell division capacity.
Why does telomerase need to have a built-in template for DNA synthesis?
Telomerase needs a built-in template for DNA synthesis because it uses this template to extend the telomeres, the repetitive DNA sequences at the ends of chromosomes. The telomerase enzyme adds specific DNA sequences to the ends of chromosomes to compensate for the natural loss of DNA that occurs during cell division. The built-in template guides the addition of these DNA sequences to maintain chromosome stability.
Why do Eukaryotic telomeres replicate differently then the rest of the chromosome?
The telomeres of eukaryotic chromosomes replicate differently because they are composed of repetitive DNA sequences that serve to protect the ends of the chromosomes from degradation and fusion. The enzyme telomerase is responsible for adding repetitive sequences to the telomeres, which helps to prevent the loss of essential genetic material during DNA replication.
What are telomeres made of?
Telomeres are made of repetitive DNA sequences and associated proteins. The DNA part typically consists of a repeating sequence like TTAGGG in vertebrates. These structures cap the ends of chromosomes, protecting them from degradation and maintaining chromosomal stability.
What structure forms at the end of DNA molecules that helps prevent gene loss?
Telomeres are repetitive sequences of DNA found at the ends of chromosomes that help protect the genetic material from being lost during cell division. They act as a cap to prevent the ends of the chromosomes from unraveling or fusing with other chromosomes.
What enzyme works to add DNA to ends in chromosomes rapidly dividi g cells such as those found in an embryo?
The enzyme that adds DNA to the ends of chromosomes in rapidly dividing cells, such as those found in an embryo, is called telomerase. Telomerase adds repetitive nucleotide sequences to the telomeres, which are the protective caps at the ends of chromosomes. This action helps maintain chromosome stability and prevents the loss of essential genetic information during cell division. In embryonic cells, telomerase activity is typically high, allowing for sustained rapid growth and division.
The enzyme telomerase solves the problem of replication by?
Telomerase helps solve the problem of DNA replication by adding repetitive sequences to the ends of chromosomes, known as telomeres. This prevents the loss of important genetic information during each round of cell division. By preserving the length of telomeres, telomerase maintains the stability and integrity of chromosomes.
Tip of chromosomes that are rounded and sealed?
The tips of chromosomes are called telomeres, which are protective structures that consist of repetitive DNA sequences and associated proteins. Telomeres prevent the degradation of the chromosome ends during DNA replication and protect the genetic information from being lost or fused with other chromosomes. As cells divide, telomeres shorten, which is associated with aging and cellular senescence. Once they become too short, the cell can no longer divide, leading to a state of growth arrest.
Teleomeres are unnecessary in bacteria because the DNA is circular?
Yes, that's correct. Bacterial DNA is organized in circular chromosomes, so telomeres, which are repetitive sequences found at the ends of linear chromosomes in eukaryotes, are not needed in bacteria to prevent DNA degradation during replication.
