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elixir [45]
3 years ago
7

Which sentence best explains how a wetland forms?

Biology
2 answers:
kkurt [141]3 years ago
8 0

Answer:

A water from rain or springs flows downhill in a narrow channel

Strike441 [17]3 years ago
4 0
I believe the answer is a
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Approximately 90% of human cancer cells exhibit significant levels of telomerase. Does this mean that telomerase is an oncogene?
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Answer:

No, telomerase is not an oncogene. It prevents the senescence that would occur due to shortened telomeres, but the cell proliferation might still be mitogen-dependent.

Explanation

telomerase is not responsible for causing  deregulation while oncogenes cause deregulation .

Telomeres length shorten after the cell division which stops them to divide again and cell die.

Telomerase prevents this decline in some kinds of cells, including stem cells, by lengthening telomeres, and the hope was that activating the enzyme could  prevent senescence.

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How might a single base substitution in the sequence of a gene affect the amino acid sequence of a protein encoded by the gene,
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The effect differs. It could produce a different amino acid in the sequence because the corresponding codon has changed. It could also prevent the production of the originally intended sequence by changing one of the amino acids of a "start" codon (aka AUG) or extend the protein's sequence by modifying a "stop" codon (UAA, UAG, UGA or UGG), producing a new protein that might be useless or have different effects on the cell.
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Cruciferous

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Their consumption is linked with lower rates of cancer and is believed to be associated with their sulfur containing phytochemicals

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