BIOCHEMISTRY W/1 TERM ACHEIVE ACCESS
9th Edition
ISBN: 9781319425746
Author: BERG
Publisher: MAC HIGHER
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Chapter 17, Problem 29P
Interpretation Introduction
Interpretation:
The reason for acetyl CoA is a specifically suitable activator for pyruvate carboxylase.
Concept introduction:
The citric acid cycle (TCA) is a catabolic process. It is a series of
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Instructions.
Given each set of information which may include common name(s) and the reaction catalyzed, you are required to identify the main class of the specific enzyme described.
Name: citryl-CoA synthetase
Reaction: ATP + citrate + CoA = ADP + phosphate + (3S)-citryl-CoA
Name: D-xylulose reductase
Reaction: xylitol + NAD+ = D-xylulose + NADH + H+
Name: cellobiose phosphorylase
Reaction: cellobiose phosphate = α-D-glucose 1-phosphate + D-glucose
Name: carbonic anhydrase
Reaction: H2CO3 = CO2 + H2O
Other info: The enzyme catalyzes the reversible hydration of gaseous CO2 to carbonic acid, which dissociates to give hydrogencarbonate above neutral pH.
Name: pantoate activating enzyme
Reaction: ATP + (R)-pantoate = AMP + diphosphate + (R)-pantothenate.
BIOCHEMISTRY. Could glycerol be used to regenerate the OAA for maintenance of TCA cycle activity? Yes or No? Explain.
Tracing glucose. Glucose labeled with 14 C at C-6 is added to a solution containing the enzymes and cofactors of the oxidative phase of the pentose phosphate pathway. What is the fate of the radioactive label?
Chapter 17 Solutions
BIOCHEMISTRY W/1 TERM ACHEIVE ACCESS
Ch. 17 - Prob. 1PCh. 17 - Prob. 2PCh. 17 - Prob. 3PCh. 17 - Prob. 4PCh. 17 - Prob. 5PCh. 17 - Prob. 6PCh. 17 - Prob. 7PCh. 17 - Prob. 8PCh. 17 - Prob. 9PCh. 17 - Prob. 10P
Ch. 17 - Prob. 11PCh. 17 - Prob. 12PCh. 17 - Prob. 13PCh. 17 - Prob. 14PCh. 17 - Prob. 15PCh. 17 - Prob. 16PCh. 17 - Prob. 17PCh. 17 - Prob. 18PCh. 17 - Prob. 19PCh. 17 - Prob. 20PCh. 17 - Prob. 21PCh. 17 - Prob. 22PCh. 17 - Prob. 23PCh. 17 - Prob. 24PCh. 17 - Prob. 25PCh. 17 - Prob. 26PCh. 17 - Prob. 27PCh. 17 - Prob. 28PCh. 17 - Prob. 29PCh. 17 - Prob. 30PCh. 17 - Prob. 31PCh. 17 - Prob. 32PCh. 17 - Prob. 33PCh. 17 - Prob. 34PCh. 17 - Prob. 35PCh. 17 - Prob. 36PCh. 17 - Prob. 37PCh. 17 - Prob. 38PCh. 17 - Prob. 39PCh. 17 - Prob. 40PCh. 17 - Prob. 41PCh. 17 - Prob. 42PCh. 17 - Prob. 43PCh. 17 - Prob. 44P
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- Less energetic electrons. Why are electrons carried by FADH2FADH2 not as energy rich as those carried by NADH? What is the consequence of this difference?arrow_forwardBetween two extremes. What is the role of a thioester in the formation of ATP in glycolysis?arrow_forwardentation . During the process of glycolysis, some hydrogen atoms are removed from glucose in the formation of pyruvate. This is an example of which (4.1) KU process (a) hydrolysis (b) dehydration (c) dehydration synthesis (condensation) (d) reduction If y think the statarrow_forward
- Pernicious anemia. Purine biosynthesis is impaired by vitamin B12 B12 deficiency. Why? How might fatty acid and amino acid metabolism also be affected bya vitamin B12B12 deficiency?arrow_forwardLong explanations are NOT NEEDED. Answer only d and e. ATP accounting. Consider 1 molecule of the sucrose (monomeric units: glucose and fructose) that will undergo complete oxidation. -Number of pyruvate molecules after glycolysis is 4.-Net ATP produced in glycolysis only (via substrate-level phosphorylation) is 2.-Number of NADH produced using the pyruvate dehydrogenase complex reaction is 1. Now find:d. Number of NADH and FADH2 produced from Krebs cycle.e. Net ATP produced (complete oxidation via Malate aspartate shuttle).arrow_forwardG. 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 Oxaleacetatearrow_forward
- They are everywhere. What energetic barrier prevents glycolysis from simply running in reverse tosynthesis glucose? What is the energetic cost to overcome this barrier?arrow_forwardLess energetic electrons. Why are electrons carried by FADH 2 not as energy rich as those carried by NADH? What is the consequence of this difference?arrow_forwardATP yield. Each of the following molecules is processed by glycolysis to lactate. How much ATP is generated from each molecule?arrow_forward
- Long explanations are NOT NEEDED. I pretty much have an idea already about this lesson, I would just like to see if my answers are correct, if it's wrong then kindly correct and just add a short explanation. ATP accounting. Consider 1 molecule of the sucrose (monomeric units: glucose and fructose) that will undergo complete oxidation. a. Number of pyruvate molecules after glycolysis is 4.b. Net ATP produced in glycolysis only (via substrate-level phosphorylation) is 2.c. Number of NADH produced using the pyruvate dehydrogenase complex reaction is 1.d. Number of NADH and FADH2 produced from Krebs cycle is 12 and 4 respectively.e. Net ATP produced (complete oxidation via Malate aspartate shuttle) is 64.arrow_forward. Pyruvate can be processed under anaerobic conditions to ethanol (in yeast) or to lactate (in mammals), as shown. Explain the primary purpose of these reactions. Describe the major biochemical features of each reactionarrow_forwardgeneration of one less FADH2 molecule. Part C B-oxidation dealls with only saturated fatty acids, but many fatty acids in natural lipids are unsaturated, meaning they contain one or more double bonds. Considering the fatty acid below, calculate the energy yield of its complete oxidation. OH Express your answer using three significant figures. ▸ View Available Hint(s) ΑΣΦ + 0 ? Submit ATParrow_forward
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