BIOCHEMISTRY
9th Edition
ISBN: 2818440090622
Author: BERG
Publisher: MAC HIGHER
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Chapter 20, Problem 27P
Interpretation Introduction
Interpretation:
The way by which the pentose phosphate pathway and glycolysis are linked by transaldolase and transketolase should be determined.
Concept introduction:
Transketolase is an enzyme that catalyzes an alcohol group transfer between sugar molecules. Transaldolase is an enzyme of the non-oxidative phase of the pentose phosphate pathway.
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In the following diagram of glycolysis. Identify the steps that are amphibolic, taking place in both glycolysis and gluconeogenesis. Also, identify the regulated steps and what compounds act as regulators.
. Describe the reaction steps of the citric acid cycle with a focus on their control. In addition
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G. ENZYME CLASSIFICATION.
Identify the main class of enzymes used to catalyzed the following reactions:
1. Lactate dehydrogenase:
NADH+H
NAD
HC-OH
CH3
CH
Pynnte
Lactate
2. Methylmalonyl-CoA mutase:
CH CH
SCOA
CH,CH,
SCOA
coenzyme B12
COO
COO
methylmalonyl-CoA
succinyl-CoA
3. Enolase:
0.
H–Ċ–0–P–0-
C-0–P-0- + H,0
HO–CH,
CH 6
Phosphoenolpyruvate
2-Phosphoglycerate
4. Chymotrypsin:
-0–CH,CH3 + H2O
- RCOOH + HOCH,CH3
5. Pyruvate carboxylase:
coo
• co, • ATP + H,0
H-C-H . ADP + P, + 2H
čoo
CH,
Pyruvate
Oxaleacetate
Chapter 20 Solutions
BIOCHEMISTRY
Ch. 20 - Prob. 1PCh. 20 - Prob. 2PCh. 20 - Prob. 3PCh. 20 - Prob. 4PCh. 20 - Prob. 5PCh. 20 - Prob. 6PCh. 20 - Prob. 7PCh. 20 - Prob. 8PCh. 20 - Prob. 9PCh. 20 - Prob. 10P
Ch. 20 - Prob. 11PCh. 20 - Prob. 12PCh. 20 - Prob. 13PCh. 20 - Prob. 14PCh. 20 - Prob. 15PCh. 20 - Prob. 16PCh. 20 - Prob. 17PCh. 20 - Prob. 18PCh. 20 - Prob. 19PCh. 20 - Prob. 20PCh. 20 - Prob. 21PCh. 20 - Prob. 22PCh. 20 - Prob. 23PCh. 20 - Prob. 24PCh. 20 - Prob. 25PCh. 20 - Prob. 26PCh. 20 - Prob. 27PCh. 20 - Prob. 28PCh. 20 - Prob. 29PCh. 20 - Prob. 30PCh. 20 - Prob. 31PCh. 20 - Prob. 32PCh. 20 - Prob. 33PCh. 20 - Prob. 34PCh. 20 - Prob. 35PCh. 20 - Prob. 36PCh. 20 - Prob. 37PCh. 20 - Prob. 38PCh. 20 - Prob. 39PCh. 20 - Prob. 40PCh. 20 - Prob. 41PCh. 20 - Prob. 42PCh. 20 - Prob. 43PCh. 20 - Prob. 44PCh. 20 - Prob. 45PCh. 20 - Prob. 46PCh. 20 - Prob. 47PCh. 20 - Prob. 48P
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- Fates of glucose 6 phosphate. Fill in the missing info for the overview of metabolismarrow_forwardD. The following reactions are encountered in the metabolic cycles. Give the main class of enzymes that catalyzes these reactions. 6. starch + HOH → a-D-glucose 7. acetyl CoA + oxaloacetate → citric acid 8. pyruvate + CO2 + ATP → oxaloacetate + ADP + Pi 9. creatine + ATP → phosphocreatine + ADP 10. alanine → propanoic acid + NH3arrow_forwardOf the steps illustrated how many are unidirectional? Identify the substrate and product of each of these steps. Identify the three enzymes that are likely to be regulated in glycolysis? How did you make this determination. Glycogen synthase is an enzyme that catalyzes the synthesis of glycogen from glucose. Glucose 6 phosphate activates glycogen synthase by allosteric regulation. Illustrate and describe how this allosteric modulation is likely to occur? Glycogen phosphorylase, an enzyme that catalyzes the breakdown of glycogen to form glucose, is active when a phosphate group is added. This is an example of enzyme regulation by ____________________________.arrow_forward
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