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See for example http://www.worthington-biochem.com/introbiochem/tempeffects.html (especially explanations given below the first figure)
For the second one, I would like you to think about what are the necessary ingredients to have an enzyme-catalyzed reaction move in the forward direction.
For the first one, "a temperature increase of 1-2 degrees will decrease the results by 10-20%." (see reference) For the second one, an inhibitor generally slows down the forward reaction, so it's not a desirable element if you want the reaction to go forward. Also, when checking answers, please state the value of the answer, not just the letter, in order to avoid confusion or errors. This will also give you a refresh in your memory and learning.
yes, your original answer for question one was correct. Once denatured, an enzyme can no longer perform it's function. For the second question, your answer was not correct. An inhibitor will slow-down a forward reaction, so will not increase the rate. Check the meaning of all the words used in the options so that you can choose the correct choice.
In general, what increases the rate of reaction is the increase of the reactants (see Le Chatelier's principle). So you need to understand what an enzyme-catalyzed reaction requires as reactants. You need More of the reactants, not less!
@kiiraa_x3 I apologize for being "difficult", but I would like you to understand your answer before you give it, because that's the sole purpose of the questions. For the second question, I will give you further hints: The reaction in question is the transformation of the substrate into something else. So substrate is a "reactant", which you need continuously for the reaction to continue. Enzyme is a catalyst, which does not get used up, but greatly increases the rate of reaction. A coenzime is a substance that makes the enzyme "click", without which the enzyme does not function. Vitamins often function as coenzymes. With this in the picture, hope you can find the correct answer for the second question. Also, when checking answers, please give the complete answer text so you know what you're talking about, and not devalue the answer to a single letter, please.
For the third question, the question is "determine if the man's heart disease is entirely related to his environment?" which of the four answer choices do you think give(s) a clue to the environment, i.e. his surroundings after he is born? Again, when checking answers, please give the complete answer text so you know what you're talking about, and not devalue the answer to a single letter, please.
environment, i.e. his surroundings "after" he is born?
Sorry, I'm not sure about the last one!