Which glycolysis reactions are catalyzed by the following enzymes?
a. Pyruvate kinase

Question

Which glycolysis reactions are catalyzed by the following enzymes?

a. Pyruvate kinase

Accepted Answer

All right. Hello everyone. So this question is asking us what is the specific function in glycolysis that is catalyzed by the enzyme trials phosphate isomerase. Option A says the conversion of glucose into glucose six phosphate. Option B says the conversion of fructose, 16 bisphosphate into two molecules. One being dihydroxy acetone phosphate or DH A option C says conversion of three phospho glyceride into two phospho glyceride. And option D says conversion of dihydroxy acetone phosphate, that's DH A P into glyceraldehyde three phosphate. Now, the nice thing about some of the enzymes necessary for any metabolic pathway but especially glycolysis in this case is that sometimes the name helps you. Now, the name of enzymes may not always be the most intuitive, but sometimes bits of information are given about their function. And trios phosphate isomerase is an example of one of those types. So first starting off with the word triumphs trios implies that we have a three carbon sugar. So based on that we can eliminate two different answer choices. Starting off with option A glucose and glucose, six phosphate are both six carbon sugars. So they are not trios, which means that they are not involved with this enzyme. Now, the same can be said for fructose, 16 bis phosphate in option B because fructose, 16 bisphosphate also has six carbons. So it's not the trios. So now let's talk a little bit more about the rest of the name where trials phosphate isomerase in the context of metabolism in metabolic reactions as a whole, an isomerase enzyme is one that converts a starting material into a different isomer. Now, oftentimes what you'll notice oftentimes an isomerase can convert an aldehyde, an aldehyde into a ketone and vice versa. But what's important to recognize here is that carbon atoms are not being added or removed, the number of carbon stays the same. The difference is that you're inter converting between an aldehyde or a ketone and vice versa. So from here, let's consider options C and D because both of them contain three carbon compounds. Now, option C describes the conversion of rep phospho glycate into two phospho glycate. Notice how the only thing that's changing here is the location of the phosphate group. So the functional group itself is not changing. The only thing that's changing is the location of that functional group on the carbon chain. So C is incorrect because it's a muta enzyme that converts three phospho glycate into two phospho glycerated instead. Again, what's important here is that the functional group itself is not changing only the location. So this leads us now to option D option D describes the conversion of dihydroxy acetone phosphate into glyceraldehyde three phosphate. So notice here how we're going from a ketone to an aldehyde that is catalyzed by an isomerase enzyme, specifically trios phosphate isomerase because we have two trios is here with a phosphate group and there you have it. Our answer here is option D in the multiple choice. And so with that being said, thank you so very much for watching And I hope you found this helpful.

Which glycolysis reactions are catalyzed by the following enzymes?
a. Pyruvate kinase

Verified video answer for a similar problem:

Key Concepts

Glycolysis

Enzyme Catalysis

Pyruvate Kinase

Which glycolysis reactions are catalyzed by the following enzymes?a. Pyruvate kinase

Verified video answer for a similar problem:

Key Concepts

Glycolysis

Enzyme Catalysis

Pyruvate Kinase

Which glycolysis reactions are catalyzed by the following enzymes?
a. Pyruvate kinase