Hiv is the virus that causes aids. in the mid-1990s, researchers discovered an enzain protease. once the enzyme's structure the active site and block it. if this strategy for stopping hiv infections were successful, it would be an example of what phenomenon? was known, researchers began looking for drugs that would fit into a noncompetitive inhibition b. denaturation c. allosteric regulation d. competitive inhibition

The correct answer is D. competitive inhibition

Explanation:

Competitive inhibition occurs when a substance called inhibitor that resembles like substrate binds in place of substrate in the enzyme and inhibit the chemical reaction that can occur by binding of enzyme with substrate.

So in competitive inhibition, the inhibitor binds to enzyme because it might have a higher affinity for enzyme or the number of inhibitors is higher than the substrate. This binding prevents the formation of the enzyme-substrate complex by blocking the active sites of the enzyme.

So here if a drug can be found that could block the active site of enzymes that is coded by HIV then it would be the example of competitive inhibition.

thermophiles, notice the prefix thermo.

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.