. Avidin is a protein that binds extremely tightly to biotin, so avidin is apotent inhibitor of biotin-requiring enzyme reactions. Consider glucose biosynthesis from cach of the following substrates and predict which of thesepathways would be inhibited by avidin.(a) Lactate(b) Oxaloacetate(c) Malate(d) Fructose-6-phosphate(e) Phosphoenolpyruvate

The synthesis of glucose from various precursors in the body is called gluconeogenesis. Glucose is…

Answered: . Avidin is a protein that binds…

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter10: From Proteins To Phenotypes

Section: Chapter Questions

Problem 14QP: If phenylalanine was not an essential amino acid, would diet therapy (the elimination of...

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Discuss the roles of phospholipase A2, cyclooxygenase, and lipooxygenase.
The cholesterol synthesized by cells uses which component of the glycolytic pathway as a starting point? a. glucose b. acetyl CoA c. pyruvate d. carbon dioxide
The Catabolism of Uric Acid Write a balanced equation for the oxidation of uric acid to glyoxylic acid, CO2, and NH3, showing each step in the process and naming all of the enzymes involved.
Using the ActiveModel for enoyl-CoA dehydratase, give an example of a case in which conserved residues in slightly different positions can change the catalytic rate of reaction.
Insulin is released when food is ingested and stimulates the uptake of glucose into the cell. Discuss tine mechanism cells employ to create a concentration gradient to ensure continual uptake of glucose from the bloodstream.
Second-messenger systems ultimately bring about the desired cell response by inducing a change in the shape and function of particular designated intracellular proteins. (True or false?)
Understanding the Mechanism of Hemolytic Anemia Genetic defects in glycolytic enzymes can have serious consequences for humans For example, defects in the gene for pyruvate kinase can result in a condition known as hemolytic anemia. Consult a reference to learn about hemolytic anemia, and discuss why such genetic defects lead to this condition.
Amino acids are not stored in the body. Describe how excess amino acids are processed in the cell.
Energetic of Fructose-1 ,6-bis P Hydrolysis (Integrates with Chapter 3.) The standard free energy change (G) for hydrolysis of fructose-1. 6-bisphosphate (FBP) to fructose-S-phosphate (F-6-P) and P: is -16.7 KJ/mol: FBP + H2O fructose-6-P + Pi The standard free energy change (G) for ATP hydrolysis is -30.5 KJ/mol: ATP + H2O ADP + Pj What is the standard free energy change for the phosphofructokinase reaction: ATP + fructose-6-P ADP + FBP b. What is the equilibrium constant for this reaction? c. Assuming the intracellular concentrations of [ATP] and (ADP] are maintained constant at 4 mM and 1.6 mM, respectively, in a rat liver cell, what will be the ratio of [FBP]/[fructose-6-P] when the phosphofructokinase reaction reaches equilibrium?
Consider the synthesis and degradation of tyrosine as shown in Figures 25.37, 25.38, and 25.48 to determine where the carbon atoms in PEP and erythrose-4-P would end up in acetoacetate and fumarate.
Release of trypsin and chymotrypsin in their active form can result in the digestion of the pancreas or small intestine itself. What mechanism does the body employ to prevent its self-destruction?
Polypeptide folding is often mediated by other proteins called chaperones. Describe how a mutant chaperone protein might be responsible for a genetic disorder involving an enzyme.

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