The rate-limiting enzyme of the pyrimidine nucleotide synthesis pathway is controlled by many different allosteric regulator...
The rate-limiting enzyme of the pyrimidine nucleotide synthesis pathway is controlled by many different allosteric regulator molecules. Which is involved in this regulation?
Select one:
a. UTP
b. ATP
c. CTP
d. All of these
e. None of these
Homework Answers
Answer : The correct answer is C (CTP)
Explanation : Cytidine triphosphate (CTP) is an allosteric modulator of the Aspartate transcarbamylase, which catalyzes an early reaction in the biosynthesis of pyrimidine nucleotides. This is the highly regulated enzyme which catalyses the condensation of Aspartate and Carbamoyl phosphate resulting in the formation of N-carbamyl-L-aspartate. This enzyme is allosterically regulated/inhibited by CTP (end product of pyrimidine pathway), and activated by ATP.
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The rate-limiting enzyme of the pyrimidine nucleotide synthesis
pathway is controlled by many different allosteric regulator...
The allosteric enzyme ATCase is regulated by CTP, which binds to the T-state of ATCase. CTP...
The allosteric enzyme ATCase is regulated by CTP, which binds to the T-state of ATCase. CTP is a: Select one: O A. negative regulator. B. coenzyme. C. positive regulator. D. cofactor E. competitive inhibitor.
Need the solution Chapter 21 Homework ● Can you write down the pathway from glucose to fatty acid? What is the rate-limiting enzyme of fatty acid biosynthesis? Who can regulate it? Can you list th...
Need the solution
Chapter 21 Homework ● Can you write down the pathway from glucose to fatty acid? What is the rate-limiting enzyme of fatty acid biosynthesis? Who can regulate it? Can you list the four enzyme-catalyzed steps involved in fatty acid synthesis? And the full name of the four enzymes. precursors, coenzymes and energy should the cell prepare? kinds of enzyme does the cell need? synthesis O If the cell wants to synthesize the C16:0 fatty acids, how many...
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Pyruvate kinase catalyzes the last reaction in the glycolytic pathway: phosphoenolpyruvate (PEP) + ADP --> pyruvate...
Pyruvate kinase catalyzes the last reaction in the glycolytic
pathway:
phosphoenolpyruvate (PEP) + ADP --> pyruvate + ATP
There are four different mammalian forms of pyruvate kinase. All
catalyze the same reaction, but they differ in their response to
the glycolytic metabolite fructose-1,6-bisphosphate (F16BP).
The activity of two forms of pyruvate kinase was measured at
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Need the solution
Chapter 21 Homework ● Can you write down the pathway from glucose to fatty acid? What is the rate-limiting enzyme of fatty acid biosynthesis? Who can regulate it? Can you list the four enzyme-catalyzed steps involved in fatty acid synthesis? And the full name of the four enzymes. precursors, coenzymes and energy should the cell prepare? kinds of enzyme does the cell need? synthesis O If the cell wants to synthesize the C16:0 fatty acids, how many...
1. A catalyst enhances the reaction rate by: a. Adding energy to the reaction b. Increasing the activation energy required for the reaction c. Reducing the activation energy required for the reaction d. Improving binding of the product to the active site 2. Numerical answer: During aerobic respiration how many ATP molecules are produced by the oxidation of a single molecule of pyruvate? 3. The trace elements magnesium and zinc, which are required for bacterial growth, are typically used as:...
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Pyruvate kinase catalyzes the last reaction in the glycolytic
pathway:
phosphoenolpyruvate (PEP) + ADP --> pyruvate + ATP
There are four different mammalian forms of pyruvate kinase. All
catalyze the same reaction, but they differ in their response to
the glycolytic metabolite fructose-1,6-bisphosphate (F16BP).
The activity of two forms of pyruvate kinase was measured at
various concentrations of PEP, as shown below. Activity was
measured in the presence (blue circles) and absence (red circles)
of F16BP.
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