Biology

Biology, 07.07.2019 15:20, Cheyanne5627

Serotonin is derived from the amino acid tryptophan and is an important neurotransmitter. a. true b. false

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Biology, 26.07.2019 14:30, daemonacoster

Tryptophan is an amino acid necessary for e. coli survival and growth. e. coli contain genes coding for enzymes that synthesize tryptophan. these genes are grouped together on a segment of dna called the tryptophan (trp) operon. cells can use these enzymes to synthesize tryptophan when it is not present in the environment. however, when tryptophan is already present in the environment, cellular resources are shifted away from manufacturing the enzymes for tryptophan synthesis. tryptophan binds with and activates the trp repressor, which then binds to the trp promoter and blocks rna polymerase. blocking rna polymerase decreases the normal transcription rate of the operon. what type of regulation does the trp operon exhibit?

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Biology, 01.08.2019 19:20, bullsfan4584

Serotonin is derived from tryptophan. a. true b. false

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Chemistry, 01.10.2019 21:00, saabrrinnaaa

After a polypeptide chain has been synthesized, certain amino acids in the peptide may become modified. for each modified amino acid, identify the standard amino acid from which it is derived. enter the unabbreviated name of the standard amino acid. the amino acid structure shows the fully ionized form. the side chain is c h 2, c h 2, c h (o h), c h 2, n h 3 (plus). standard amino acid: identify the modification that yields the first amino acid depicted. modifiedstructurealttext standard amino acid: identify the modification that yields the second amino acid depicted.

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Chemistry, 19.10.2019 05:30, vlactawhalm29

After a polypeptide chain has been synthesized, certain amino acids in the peptide may become modified.for each modified amino acid, identify the standard amino acid from which it is derived. enter the unabbreviated name of the standard amino acid.

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