Answer:
The correct answer is b The regulator gene falls off the operator and the structural genes get transcribed.
Explanation:
Tryptophan operon contain3 regulatory genes and 5 structural genes.when adequate amount of tryptophan is present at that time the tryptophan binds to the repressor molecule encoded by tryp R gene.Thus Tryptophan act as co repressor .The repressor molecule bound to tryptophan interacts with operator region resulting in blocking the expression of structural genes.
But when tryptophan is absent at that time repressor molecule cannot function.As a result the repressor molecule fall off from the operator and structural genes get transcribed.
Microtubules, microfilaments, and intermediate filaments make up the _____, which lies beneath the plasma membrane and provides support, movement, and<span>shape for the cell.
</span>"C. cytoskeleton"
I think the correct answer from the choices listed above is the first option. T<span>he scientists were concerned about the glue used to reattach the birds’ tails because they </span><span>did not know if it would hold the tails in place very long. Hope this answers the question.</span>
Answer: Omnivore
Explanation: A Carnivore eats meat, an Herbivore eats plants, and an Omnivore eats both
<span>Erosions affecting the mucous membranes of the digestive system are called ulcers.These ulcers can cause pain and bleeding in the digestive system causing discomfort for the person who has them.</span>