The trp repressor blocks transcription of the trp operon (B) when the repressor binds to tryptophan.
trp operon or the tryptophan operon codes enzymes for the amino acid tryptophan. The operon is on when the tryptophan is low in amount whereas the operon is off when the tryptophan is low in amount. The operon is an assimilation of five genes.
Repressor is a small protein that is supposed to prevent the synthesis of proteins. It does so binding to the operator gene. Therefore, presence or absence of repressor is a determining factor for an operon to be on or off.
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Answer would be D. The ecliptic would be path the Sun appears to move during the day.
D.The moon’s orbit must cross the plane of the ecliptic
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Placing a rat in a cage where electrical shocks over which the rat has no control are occasionally administered through the floor is a way to create → <span>learned helplessness
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There heart began to beat faster and their body produce more sweat and there blood is following faet
