Biology, 10.12.2019 19:31, chrisraptorofficial
Telomerase, ar-enzyme implicated in aging and cell lifespan, overcome this problem. telomerase adds additional deoxynucleotides to the end of the chromosome, lengthening it. this dna sequence, or telomere, prevents the loss of essential dna from the ends of chromosomes.
1. which statements describe telomeres and the actions of telomerase?
o telomerase activity is turned off in most human cells, causing the telomeres to gradually shorten as the individual ages.
o telomerase contains a g‑rich template sequence that adds a c‑rich dna sequence to the lagging strand of the chromosome.
o inappropriate activation of telomerase can result in cellular immortality, one of the cellular changes implicated in the development of cancer.
o telomerase consists of an rna template and a protein component that adds complementary nucleotides to the 3′ end of dna.
o a telomere forms a loop with a section of the complementary dna strand, protecting the chromosome from degradation by endonucleases.
Answers: 3
Biology, 22.06.2019 06:00, theresamarieuehling2
Most animal cell membranes have proteins that pump. ions out of the cell and potassium ions into this
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Biology, 22.06.2019 15:30, dogwisperer101
When does a spring tide occur? question 9 options: they occur when the sun, moon, and earth are aligned. in spite of their name, these tides occur twice a year in the spring and fall. they occur on the date of the vernal equinox each year, no matter what stage the moon is in. this is why they are called spring tides. they occur when the sun, moon, and earth are at 45-degree angles from each other. this happens once every spring. they occur when the sun, moon, and earth are aligned. in spite of their name, these tides occur all year long.
Answers: 2
Telomerase, ar-enzyme implicated in aging and cell lifespan, overcome this problem. telomerase adds...
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