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because it has its own modification and restriction system which prevents its own DNA from degradation as telomeres are mainly responsible to protect the DNA from exonuclease activity of DNase.
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What is the protective cap of DNA on the tip of chromosomes?
The telomere is the protective cap of DNA on the tip of chromosomes. You lose a small amount of these telomeres each time the cell divides. Eventually the telomeres be lost as you age. Short chromosomes because of lack telomeres are one reason aging occurs.
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 main ring of DNA in a prokaryotic cell?
Chromosomes
The chromosomes of eukaryotic cells have more what than do the chromosomes of prokaryotic cells?
The chromosomes of eukaryotic cells have more DNA than the chromosomes of prokaryotic cells. Prokaryotes usually only have 1 circular chromosome and no "junk DNA", while eukaryotes are multi-chromosomal.
What protein structure moves chromosomes?
During mitosis and meiosis, kinetochores move chromosomes across the spindle fibers. The kinetochores serve as vehicles and the fibers serve as roads.
What is the protective cap of DNA on the tip of chromosomes?
The telomere is the protective cap of DNA on the tip of chromosomes. You lose a small amount of these telomeres each time the cell divides. Eventually the telomeres be lost as you age. Short chromosomes because of lack telomeres are one reason aging occurs.
Heterochromatic regions at the ends of chromosomes are?
Telomeres.
What are repetitive DNA sequences in the ends of chromosomes called?
Telomeres
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
Ends of chromosomes that get shorter each time a cell divides?
Telomeres.
Do prokaryotic cells have chromosomes?
No
Does a prokaryotic cell contain chromosomes?
No,they do not have.They have plasmids.Only eukariyotes have chromosomes.
A type of protein found in eukaryotic chromosomes but not prokaryotic chromosomes is?
Histone
How are the structures prokaryotic chromosomes and eukaryotic chromosomes alike?
Chromosomes are only in eukariyotes.Can not be seen in prokariyotes.
The enzyme telomerase solves the problem of replication by?
Telomerase is an enzyme that adds nucleotides to the ends of telomeres in chromosomes. They do not solve any problems in replication
Which organisms have circular chromosomes?
Prokaryotic organisms such as Bacteria have circular form of chromosomes
Eukaryotic Chromosome are formed primarily of what two molecules?
Eukaryotic chromosomes are formed primarily of chromatids and telomeres
