Biochemistry
6th Edition
ISBN: 9781305577206
Author: Reginald H. Garrett, Charles M. Grisham
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 18, Problem 9P
Comparing Glycolysis Entry Points for Sucrose Sucrose can enter glycolysis by either of two routes:
Sucrose phosphorylase:
Sucrose + Pi
Invertase:
Sucrose + H20
Would either of these reactions offer Jin advantage over the other In the preparation of hexoses fur entry into glycolysis?
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
The intermediates of glycolysis with a free energy of hydrolysis sufficient to couple conversion of
ADP + phosphate to ATP (a substrate level phosphorylation) include (Choose all that apply)
O phosphoenolpyruvate
O 2-phosphoglycerate
O 1,3-bisphosphoglycerate
O glucose-6-phosphate.
O fructose-6-phosphate.
O fructose-1,6-bisphosphate.
O dihydroxyacetone phosphate
In different organisms sucrose can be cleaved either by hydrolysis or by
phosphorolysis. Calculate the ATP yield per mole of sucrose metabolized by
anaerobic glycolysis starting with (a) hydrolytic cleavage and (b) phosphoro-
lytic dleavage.
The pyruvate →lactate reaction in animals is reversible, but the pyruvate → ethanol fermentation in yeast is irreversible. Explain.
Chapter 18 Solutions
Biochemistry
Ch. 18 - Characterizing Glycolysis List the reactions of...Ch. 18 - Radiotracer Labeling of Pyruvate from Glucose...Ch. 18 - Effects of Changing Metabolite Concentrations on...Ch. 18 - Prob. 4PCh. 18 - Prob. 5PCh. 18 - The Reactions and Meehanisms of the Leloir Pathway...Ch. 18 - The Effect of lodoacetic Acid on the...Ch. 18 - Prob. 8PCh. 18 - Comparing Glycolysis Entry Points for Sucrose...Ch. 18 - Prob. 10P
Ch. 18 - Prob. 11PCh. 18 - Prob. 12PCh. 18 - Prob. 13PCh. 18 - Energetic of Fructose-1 ,6-bis P Hydrolysis...Ch. 18 - Prob. 15PCh. 18 - Energetics of the Hexokinase Reaction The...Ch. 18 - Prob. 17PCh. 18 - Distinguishing the Mechanisms of Class I and Class...Ch. 18 - Prob. 19PCh. 18 - Understanding the Mechanism of Hemolytic Anemia...Ch. 18 - Prob. 21PCh. 18 - Based on your residing of this chapter, what would...Ch. 18 - Examine the ActiveModel for alcohol dehydrogenase...Ch. 18 - Based on your knowledge of the structure of NAD+...Ch. 18 - Using the ActiveModel for phosphofructokinase...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biochemistry and related others by exploring similar questions and additional content below.Similar questions
- ATP Accounting Upon digestion of starch, maltose, one of its degradation products, is further hydrolyzed into its monosaccharide components prior to intestinal absorption and entry into the glycolysis. Calculate the number of ATP molecules produced from the digestion and complete oxidation of 1 molecule of maltose considering the malate-asparate shuttle. Answer the following items using numerical value only (e.g. 1, not "1 ATP") which will help you arrive at the final answer for this question. a. Total number of glucose molecules entering glycolysis: b. Total number of pyruvate molecules produced at the end of glycolysis: c. Total number of mitochondrial NADH produced after pyruvate is acted upon by the pyruvate dehydrogenase complex: d. Total number of CO2 released right after the pyruvate dehydrogenase complex reaction: e. Total number of acetyl CoA molecules entering the citric acid cycle:arrow_forwardExplain this to me, I’m confusedarrow_forwardWhich of the following accurately characterize glycolysis under standard biochemical conditions? (Pick two.) Glycolysis reduces glucose and produces oxidized electron carriers. Glycolysis oxidizes glucose and produces reduced electron carriers. The exergonic conversion of glucose into pyruvate is coupled to the endergonic synthesis of two ATP in a pathway that is exergonic, net. The endergonic conversion of glucose into pyruvate is coupled to the endergonic synthesis of two ATP in a pathway that is exergonic, net.arrow_forward
- ATP Accounting Upon digestion of starch, maltose, one of its degradation products, is further hydrolyzed into its monosaccharide components prior to intestinal absorption and entry into the glycolysis. Calculate the number of ATP molecules produced from the digestion and complete oxidation of 3 molecules of maltose considering the malate-aspartate shuttle. Answer the following items using numerical value only (e.g. 1, not "1 ATP") which will help you arrive at the final answer for this question. a. Total number of glucose molecules entering glycolysis: b. Total number of pyruvate molecules produced at the end of glycolysis: c. Total number of mitochondrial NADH produced after pyruvate is acted upon by the pyruvate dehydrogenase complex: d. Total number of CO2 released right after the pyruvate dehydrogenase complex reaction: e. Total number of acetyl CoA molecules entering the citric acid cycle: f. Total number of net cytosolic ATP molecules produced right after glycolysis: g. Total…arrow_forwardProvide an explanation for why glucose-6-phopshate must be isomerized to fructose-6-phosphate in glycolysis.arrow_forwardATP Accounting Upon digestion of starch, isomaltose (an isomer of maltose), one of its degradation products, is further hydrolyzed into its monosaccharide components prior to intestinal absorption and entry into the glycolysis. Calculate the number of ATP molecules produced from the digestion and complete oxidation of 1 molecule of isomaltose considering the glycerol 3-phosphate shuttle. Answer the following items using numerical value only (e.g. 1, not "1 ATP") which will help you arrive at the final answer for this question. a. Total number of glucose molecules entering glycolysis: 1 b. Total number of pyruvate molecules produced at the end of glycolysis: 2 c. Total number of mitochondrial NADH produced after pyruvate is acted upon by the pyruvate dehydrogenase complex: d. Total number of CO2 released right after the pyruvate dehydrogenase complex reaction: e. Total number of acetyl CoA molecules entering the citric acid cycle: f. Total number of net cytosolic ATP molecules produced…arrow_forward
- Write balanced biochemical equations for all the reactions in the catabolism of glucose to two molecules of pyruvate (the preparatory & payoff phase of glycolysis), including the standard free-energy change ΔG for each reaction. Then write the overall or net equation of glycolysis, with the net standard free-energy change when one molecule of glucose is converted into 2 molecules of pyruvate.arrow_forwardDraw OUT THE arrow pushing reaction mechanism for the following steps of glycolysis: SHOW/IDENTIFY the arrow pushing mechanism in at least 2 steps. CH,OPO CH,OH hexokinase 2+ H H H H H H ОН + ATP OH H ADP + H+ H ОН + НО HO OH H ОН H ОН Glucose-6-phosphate (G6P) Glucosearrow_forwardExtending the Mechanism of Methylmalonyl-CoA Mutase to Similar Reactions Based on the mechanism for the methylmalonyl-CoA mutase (see problem 14), write reasonable mechanisms for the following reactions shown.arrow_forward
- What is the catalytic efficiency of Catalase ? Table. The values of KM and kcat for some Enzymes and Substrates Enzyme Carbonic anhydrase Substrate CO2 HCO3 KM (M) 1.2 x 10-2 2.6 x 10-2 Kcat (s-1) 1.0 x 106 4.0 x 105 Catalase H2O2 2.5 x 10-2 1.0 x 107 Urease Urea 2.5 x 10-2 4.0 x 105 O A. 4 x 108 M-s-1 O B. 4 x 108 M-1.s-1 OC25x 10-9 M-s1 D. 2.5 x 102 M-1.s-1 OE 1.0 x 107 s1arrow_forwardIn addition to consumption by glycolysis, glucose 6-phosphate is used to generate other 5. (a) key cellular metabolites – including precursors for nucleic acids and modulators of cellular red/ox bal- ance – via the oxidative phase of the pentose phosphate pathway. What nucleic acid precursor mole- cule and what key cofactor are generated by the oxidative phase of the pentose phosphate pathway? Draw the reactions including all reactants and products that comprise this phase of the pathway.arrow_forwardList the three different routes to catabolize glucose to Why is it necessary to start by spending one or two molecules of ATP? Why are glucose catabolism pathways ubiquitous, even in bacterial habitats where glucose is scarce? Give several Summarize the Krebs TCA cycle; list the substrates, and products.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
BiochemistryBiochemistryISBN:9781305577206Author:Reginald H. Garrett, Charles M. GrishamPublisher:Cengage Learning
Biochemistry
Biochemistry
ISBN:9781305577206
Author:Reginald H. Garrett, Charles M. Grisham
Publisher:Cengage Learning
Anaerobic Respiration; Author: Bozeman Science;https://www.youtube.com/watch?v=cDC29iBxb3w;License: Standard YouTube License, CC-BY