Which of the following reactions in glycolysis is/are reversible? A. PEP → pyruvate B. DHAP → G3P C. glucose → G6P D. G6P → F6P
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Which of the following reactions in glycolysis is/are reversible?
A. PEP → pyruvate
B. DHAP → G3P
C. glucose → G6P
D. G6P → F6P
Step by step
Solved in 2 steps
- In the first stage of glycolysis, the hydroxyl group on C6 of glucose is phosphorylated to form glucose-6-phosphate (G6P). In this reaction, which of the following statements is true? a. O b. d. e. Glucose kinase is used to catalyze the reaction. Hexokinase is used to catalyze the reaction. A molecule of NADH is synthesized. One ATP is synthesized. Fructose kinase is used to catalyze the reaction.Indicate at what step in the glycolysis pathway each of the following events occur 1. First phosphorylation of ADP occurs 2. First “energy rich” compound is produced 3. Second “energy rich” compound undergoes reaction 4. First isomerization reaction occurs 5. Second formation of ATP occurs 6. Second “energy rich” compound is produced 7. ATP is converted to ADP for the second time 8. A dehydration reaction occursDetermine the number of carbon atoms present and the the total number of phosphate groups present in each of these following intermediates of glycolysis: a. Glucose 6-phosphate b. Fructose 1,6-phosphate
- Define the following terms: a. coenzyme b. anabolic pathway c. catabolic pathway d. signal transduction pathway e. glycolysisTwo of the bypass reactions of gluconeogenesis involve: a phosphorylation of ADP using phosphate from the metabolite. b phosphorylation of the metabolite using phosphate from ATP. c dephosphorylation of the metabolite without using it to make ATP. d phosphorylation of the metabolite using phosphate from Pi.c) Some scientists debate whether it is correct to consider pyruvate as “the end of glycolysis”. Elaborate on this statement, discussing supporting and limiting facts.
- During glycolysis there are two hexoses in the pathway. a. What are these two hexoses? b. What are the two phosphorylated products? What is the energy cost to phosphorylate them? C.A figure of the energy payoff phase of glycolysis is shown below. Look at the reaction labelled with a 6 (on the far left), which involves the conversion of glyceraldehyde-3-phosphate to 1,3-bisphosphoglycerate. reduced? HC O CHOH CH₂O-P Glycer- aldehyde 3-phosphate (G3P) 2 NADH 2 NAD+ + 2 H+ Triose phosphate 2 P₁ dehydrogenase Copyright © 2018 Pearson Canada Inc. P CHOH CH₂0-P 1,3-Bisphospho- glycerate 1,3- bisphosphoglycerate NADH NAD+ 2 ADP GLYCOLYSIS: Energy Payoff Phase Glyceraldehyde-3-phosphate 2 ATP Phospho- glycerokinase 2 Which of the compounds is C=O CHOH H–CO- P Phospho- CH₂0-P glyceromutase CH₂OH 8 3-Phospho- glycerate C=O 2-Phospho- glycerate 2. ATP 2 ADP BYD Pyruvate kinase 10 2 H₂O Enolase 2 C=O CO-P CH2 Phosphoenol- pyruvate (PEP) CH3 PyruvateWhich step in glycolysis is an example of substrate-level phosphorylation? OA. Step 1: glucose + ATP →→ glucose 6-phosphate + ADP + Pi B. Step 3: fructose 6-phosphate + ATP C. Step 7: 1,3-bisphosphoglycerate D. Step 10: phosphoenolpyruvate E. Both c and d ->>> fructose 1,6-bisphosphate + ADP + P₁ + ADP + P₁ → 3-phosphoglycerate + ATP -> + ADP + Pi → pyruvate + ATP
- CHOOSE THE CORRECT LETTER Which of the following reaction types are NOT found in glycolysis?A. phosphorylationB. reductionC. oxidationD. isomerizationWith regards to glycolysis, all of the following statements are FALSE except . a. glycolysis does not require oxygen o b. 4 net ATP are formed O c. 2 ATP gre formed in the energy payoff phase d. 1 ATP are used in the energy payoff phase e. glycolysis occurs in the mitochondriaIllustrate the following processes and explain briefly and concisely:a. lactic acid formationb. glycolysisc. citric acid cycled. electron-transport chain