It is true that telomerase activity declines with old age which explains why cells lose their ability to divide after many replications.
Telomeres are DNA–protein complexes found at the ends of each chromosome they contain repetitive sequences of DNA. Telomeres protect the genome from nucleic bases degradation, unnecessary recombination, repair, and prevent the fusion of chromosomes. Telomeres, therefore, play a vital role in preserving the information in our genome.
Telomeres shorten with every consecutive DNA replication cycle limiting the number of cell divisions a cell can undergo, Telomeres act as a tumor suppressor by halting the replication of cells which contains several mutations after many division cycles.
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The source of the oxygen atom used in formation of the water in aerobic respiration is (C) molecular oxygen (O₂).
Water has the chemical formula H₂O. It makes up approximately 60% of a human's body. It is also an end product of the cellular respiration. It is also considered to be the universal solvent. The body essentially requires water to perform all of its functions.
Aerobic respiration is the breakdown of glucose to yield energy in the form of ATP in the presence of oxygen. All the aerobic organisms follow this mode of respiration. the by-products of the respiration and carbon dioxide and water.
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Answer:
D. Swelling is evidence of an inflammatory response but not of an immune response.
Explanation:
just took the test hope it helps ;)
Greetings,
I'm going to attempt to answer this; as far as I know, meiosis itself never involves chromosome replication.
Rather, replication occurs during the S-phase of interphase.
The cell then divides via meiosis to prevent further replication.
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