How do the ligand (substrate) and the protein/enzyme predominantly interact? O sigma bonds O Metallic bonds O Pi bonds 2 lonic bonds O Weak non-covalent bonds

Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
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### How do the ligand (substrate) and the protein/enzyme predominantly interact?

- [ ] sigma bonds
- [ ] Metallic bonds
- [ ] Pi bonds
- [ ] Ionic bonds
- [ ] Weak non-covalent bonds
Transcribed Image Text:### How do the ligand (substrate) and the protein/enzyme predominantly interact? - [ ] sigma bonds - [ ] Metallic bonds - [ ] Pi bonds - [ ] Ionic bonds - [ ] Weak non-covalent bonds
**Question:**

You have isolated a novel bacterium from the Pacific Ocean and cloned its pyruvate kinase gene. You want to test whether it can really catalyze the very last reaction of glycolysis which is a substrate phosphorylation reaction. You must provide which of the following substrates to test your idea, in addition to ADP and other components?

**Options:**

- lactate
- ethanol
- glyceraldehyde 3-phosphate
- glucose 6-phosphate
- phosphoenol-pyruvate

**Explanation:**

The problem involves the last step of glycolysis, which is catalyzed by the enzyme pyruvate kinase. This enzyme is responsible for transferring a phosphate group from phosphoenolpyruvate (PEP) to ADP, yielding one molecule of ATP and one molecule of pyruvate. Therefore, to test the activity of the cloned pyruvate kinase, the correct substrate to use in addition to ADP and other necessary components is **phosphoenol-pyruvate**.
Transcribed Image Text:**Question:** You have isolated a novel bacterium from the Pacific Ocean and cloned its pyruvate kinase gene. You want to test whether it can really catalyze the very last reaction of glycolysis which is a substrate phosphorylation reaction. You must provide which of the following substrates to test your idea, in addition to ADP and other components? **Options:** - lactate - ethanol - glyceraldehyde 3-phosphate - glucose 6-phosphate - phosphoenol-pyruvate **Explanation:** The problem involves the last step of glycolysis, which is catalyzed by the enzyme pyruvate kinase. This enzyme is responsible for transferring a phosphate group from phosphoenolpyruvate (PEP) to ADP, yielding one molecule of ATP and one molecule of pyruvate. Therefore, to test the activity of the cloned pyruvate kinase, the correct substrate to use in addition to ADP and other necessary components is **phosphoenol-pyruvate**.
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