Enzymes speed up chemical reactions by .
a. hea...

Question

Enzymes speed up chemical reactions by                   .
a. heating cells;
b. binding to substrates and placing stress on their bonds;
c. changing the shape of the cell;
d. supplying energy to the substrate

Accepted Answer

Hello everyone. Let's look at our next question here. We've got this funny little diagram with three elements labeled on it. And the question says, select the appropriate labels for a. B and C. In the given figure. And when we look at our answer choices were given three things enzyme active site and sub strict. So let's just say we're on a test. Can't remember what things are there. Is there a way to work through this? Well, hopefully remember that an enzyme is a protein and proteins are rather large, complicated molecules folded up into a three dimensional shape um with one or more chains. Um So when we look at our diagram, we see a big sort of blob here with a shape on it that matches a small smaller molecule. So if we hang on to that, even an enzyme is a protein, we can pretty easily identify choice A with the enzyme because that's this big large thing here. So then we have remaining active site and substrate. So active site, we think about a location and we see that choice B is a location where something will match matches the shape of this little molecule. So that could clue us in that choice B is the active site. Um It's the site where the molecule the enzyme is going to act on can fit like a puzzle piece. So the enzyme can catalyze whatever reaction it does. And then so that leaves C as the substrate and the the substrate is the molecule that the enzyme matches with to catalyze whatever reaction it does. So that leaves us with choice. Look at our choices. We know that part C. Is the substrate up here on top so and be active site A enzyme. So let's start eliminating since A. Should be the enzyme. Let's eliminate any answer that doesn't have that. So we can eliminate B. Which has A. Is the active site. C. Has A. As a substrate. We're down to A. And D. So let's look at part B. Is the active site. So Choice A. Does have B. As the active site, but choice D. Is incorrect. It has B. As the substrate. So we can eliminate D. And we're left with are correct answer which correctly labels part A. As the enzyme, part B as the active site and part C as the sub strict. See you in the next video.

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