<p>@katzly did you put glycolysis or photosynthesis? For the yeast question, I was debating between 6 and I think 7? I put 6 because not only did it reach the highest y values, but it took the least amount of time. Also, for the other question I put the 30 minute answer… None of the others make sense. According to the graph, varying pH’s affected yeast activity, not the other way around. </p>
<p>@ladyrainicorn I feel like the two answers are almost the same, put i chose the former because before a reaction occurs a catalyst needs to change the bonds of the reactant’s bonds… “Sometimes this happens because enzymes might weaken a covalent bond within a substrate molecule. In other cases this lowering of activation energy seems to happen because the enzyme holds the substrate molecules in a particular position that increases the likely that the molecules are going to react.” [What</a> is activation energy biology? - Yahoo! Answers](<a href=“Yahoo | Mail, Weather, Search, Politics, News, Finance, Sports & Videos”>Yahoo | Mail, Weather, Search, Politics, News, Finance, Sports & Videos)</p>