INTEGRATED PRINC.OF ZOOLOGY(LL)(FD)
17th Edition
ISBN: 9781260704310
Author: HICKMAN
Publisher: MCGRAW-HILL CUSTOM PUBLISHING
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Textbook Question
Chapter 4, Problem 10RQ
Why must glucose be “primed” with a high energy phosphate bond before it can be degraded in the glycolytic pathway?
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Why are there reversible steps in the glycolytic pathway? Explain why they all be could not be irreversible?
Why is the formation of fructose-1,6- bisphosphate a step in which control is likely to be exercised in the glycolytic pathway?
c) As what molecule does each of the monosaccharides enter glycolysis?
d) How many moles of ATP are generated from the complete oxidation of one mole
of lactose? Show all the steps for the calculation of moles of ATP. Be sure to
account for energy used in activating the components of lactose so that they can
enter glycolysis.
Chapter 4 Solutions
INTEGRATED PRINC.OF ZOOLOGY(LL)(FD)
Ch. 4 - State the first and second laws of thermodynamics....Ch. 4 - Explain what is meant by free energy in a system....Ch. 4 - Many biochemical reactions proceed slowly unless...Ch. 4 - What happens in the formation of an...Ch. 4 - Explain three ways that enzymes may be regulated...Ch. 4 - What is meant by a high-energy bond, and why might...Ch. 4 - Although ATP supplies energy to an endergonic...Ch. 4 - What is an oxidation-reduction reaction and why...Ch. 4 - Give an example of a final electron acceptor found...Ch. 4 - Why must glucose be primed with a high energy...
Ch. 4 - What happens to the electrons removed during the...Ch. 4 - Why is acetyl-CoA considered a strategic...Ch. 4 - Why are oxygen molecules important in oxidative...Ch. 4 - Explain how animals can generate ATP without...Ch. 4 - Why are animal fats sometimes called the king of...Ch. 4 - The breakdown of amino acids yields two products:...Ch. 4 - Explain the relationship between the amount of...Ch. 4 - Prob. 1FFT
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- What enzyme will not be used if the oxidative portion of the pentose phosphate pathway is operating to produce ribose 5-phosphate? Ribulose 5-phosphate isomerase 6-phosphoglucono-lactonase 6-phosphogluconate dehydrogenase Transaldolasearrow_forwardWhat is the effect on the biosynthetic pathways if the oxidative branch of a person’s pentose phosphate pathway is inactive? What effect would it have on the glycolytic pathway?arrow_forwardHow does the hydrolysis of fructose-1,6- bisphosphate bring about the reversal of one of the physiologically irreversible steps of glycolysis?arrow_forward
- Please explain the concept of a "feed-forward" mechanism and provide an example of this in the glycolytic pathway.arrow_forwardWhat is the glycolytic substrate responsible for the entry of Mannose in the preparatory stage of glycolysis? How?arrow_forwardWhat enzyme can catalyze the committed step of the pentose phosphate pathway? Please choose one phosphopentose isomerase 6-phosphogluconate dehydrogenase lactonase phosphofructokinase glucose 6-phosphate dehydrogenasearrow_forward
- Why is the formation of fructose1,6bisphosphate a step in which control is likely to be exercised in the glycolytic pathway?arrow_forwardStep 4 of the pentose phosphate pathway converts ribulose-5-phosphate to ribose-5-phosphate. Which glycolytic reaction does this reaction resemble and what type of enzyme catalyzes it?arrow_forwardThe conversion of 1 mol of fructose 1,6-bisphosphate to 2 mol of pyruvate by the glycolytic pathway results in what type of net formation?arrow_forward
- Identify the following as a characteristic of one or more following process: glycolysis, glycogenesis, Glycogenolysis, and gluconeogenesis. 1. Glucose 6-phosphate is the initial reactant 2. Glucose is the final product 3. Glucose 6-phosphate is produced in the first step 4. UTP is involved in the process 5. ADP is converted to ATP in this processarrow_forwardIn the first stage of glycolysis, fructose-1,6-bisphosphate iscleaved to form glyceraldehyde-3-phosphate and dihydroxyacetone phosphate. The latter molecule can then be converted to glyceraldehyde-3-phosphate. Illustrate themechanisms whereby these reactions occurarrow_forwardWhy isn’t the hexokinase step the commitment step for glycolysis even though it is the first step and is irreversible?arrow_forward
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