Question

The following is a pathway for the biosynthesis of molecule D catalyzed by enzymes E1, E2,...

The following is a pathway for the biosynthesis of molecule D catalyzed by enzymes E1, E2, and E3

. E1    E2    E3

A → B → C → D

You are studying the reaction catalyzed by E1 in the absence of the other enzymes. You find that the rate of the reaction decreases as you add increasing concentrations of D. What does this tell you about the mechanism of regulation of enzyme E1?

0 0
Add a comment Improve this question Transcribed image text
Answer #1

This is an example of feedback inhibition. In this case, product D is inhibiting the enzyme E1.

This is feedback inhibition because in this the end product is inhibiting the first enzyme of the reaction.

So, this is an example of feedback inhibition.

Product D could be binding to the allosteric site of the enzyme and it will be inhibiting the enzyme.

So, this is feedback inhibition.

Add a comment
Know the answer?
Add Answer to:
The following is a pathway for the biosynthesis of molecule D catalyzed by enzymes E1, E2,...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions
  • 1. You are considering the following biological reactions that are catalyzed by specific enzymes as shown below. In...

    1. You are considering the following biological reactions that are catalyzed by specific enzymes as shown below. In reaction #1, enzyme El catalyzes the conversion of compound A to compound B in a truly reversible reaction in which the reverse reaction is just as likely as the forward reaction. In reaction #3, enzyme E2 catalyzes an energy requiring reaction that uses compounds C and D as substrates to produce compound E. In reaction #3, enzyme E3 catalyzes an energy producing...

  • Imagine you do a version of the Beadle-Tatum experiment in which you attempt to test the...

    Imagine you do a version of the Beadle-Tatum experiment in which you attempt to test the one-gene, one-enzyme hypothesis, but using the pathway of synthesis of amino acid Q from X (below). The reactions, in order, are catalyzed by enzymes E1-E5. X is always present in cells, and cells need Q to grow. E1 E2 E3 E4 E5 - xty 2 z 3 photo You identify a mutant strain that doesn't grow in normal medium, but does grow in medium...

  • 9. Which of the following statements about enzyme catalyzed reactions is NOT true? a. Enzymes form...

    9. Which of the following statements about enzyme catalyzed reactions is NOT true? a. Enzymes form complexes with their substrates b. Enzymes lower the activation energy for chemical reactions c. Enzymes change the Key for chemical reactions d. Many enzymes change shapes slightly when substrate binds 10. To overcome an energy barrier between reactants and products, energy must be provided to get the reaction started. This energy, which is recovered as the reaction proceeds, is called: a. Activation energy b....

  • 1.  Show  4 metabolic reactions catalyzed by phosphatases and describe their role in metabolism and also describe the...

    1.  Show  4 metabolic reactions catalyzed by phosphatases and describe their role in metabolism and also describe the regulation of each of these enzymes.  You must include at least two different metabolic pathways. 2.  a. The statin drugs are prescribed for people with high cholesterol levels.  Describe their mechanism of action including a kinetic analysis.   b. What are the differences/similarities between the various statin drugs and the natural substrate?   c. Like the statins, many drugs act as inhibitors of metabolic pathways.  Choose another drug that inhibits...

  • QUESTION 1 Imagine you want to get rich by genetically engineering tobacco plants to produce acai...

    QUESTION 1 Imagine you want to get rich by genetically engineering tobacco plants to produce acai berry juice. To do so, you insert the genes for each of the enzymes in the hypothetical acai synthesis pathway, the first step of which is (hypothetically) conversion of glucose to fructose. The challenge is that glucose must be maintained at or above a minimum concentration or the plant will die because it can no longer make ATP. For the reaction pathway shown below,...

  • 1. Protein kinases phosphorylate target enzymes and as a result enzymes become activated or inactivated. Which...

    1. Protein kinases phosphorylate target enzymes and as a result enzymes become activated or inactivated. Which of the statements are TRUE? (Multiple answers: You can select more than one option) A. Phosphorylated enzymes behave like competitive inhibitors B The presence of a phosphate acts as a non-competitive inhibitor/activator. No change in Km but significant change in Vmax C. The presence of a phosphate group induces a conformational change that modifies the affinity and catalytic ability of a target enzyme D....

  • Molecules 1 and 2 combine to form molecule 3 and the reaction proceeds faster in the...

    Molecules 1 and 2 combine to form molecule 3 and the reaction proceeds faster in the presence of enzyme 4. Molecule 5 was found to block the formation of 3. You want to find out the mechanism of action of molecule 5 so you add more 1 and 2 to the mix. To your delight, the block of the formation of 3 is removed. Molecule 5... A. lowers the energy of activation needed for the reaction that combines 1 and...

  • NAD+ -dependent Glyceraldehyde-3-phosphate + Dehydrogenase from Thermoproteus tenax. 1. Name the three enzymes that catalyze irreversible,...

    NAD+ -dependent Glyceraldehyde-3-phosphate + Dehydrogenase from Thermoproteus tenax. 1. Name the three enzymes that catalyze irreversible, regulated reactions in glycolysis as studied in class. 2. What is the significance of the GAPDH reaction in E. coli to glycolysis? 3. How does the reaction catalyzed by GAPDH from T. tenax presented here differ from the reaction carried out in E. coli? 4. The activity of the GAPDH enzyme was assayed in the presence of a constant amount of glyceraldehyde-3-phosphate and an...

  • You are given a circular DNA molecule to analyze that is 3,000bp (3 Kb) long. You...

    You are given a circular DNA molecule to analyze that is 3,000bp (3 Kb) long. You proceed to treat the DNA molecule with different cutting enzymes and then you run the individual reactions on a gel. The following gel is produced with each column representing a different reaction (lane). In lane 1 a molecule weight ladder is run. In lane 2, the circular DNA is NOT treated with any enzyme. In lane 3 the DNA is treated with an enzyme...

  • Consider the following hypothetical chemical pathway (A---->D) consisting of three individual reaction steps (A-->B,B-->C,C-->D) This is...

    Consider the following hypothetical chemical pathway (A---->D) consisting of three individual reaction steps (A-->B,B-->C,C-->D) This is the set of questions Please use this set of rules/guidlines Homework no.3. Bloenergete READ THESE IMPORTANT INSTRUCTIONS! These instructions are in force, wherever applicable, for all homework assignments and exams throughout the semester. When working problems, follow the guidelines laid out in the sheet I passed out to you about following the rules of good math "grammar Especially, be sure to set up the...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT