BIOCHEMISTRY W/1 TERM ACHEIVE ACCESS
9th Edition
ISBN: 9781319425746
Author: BERG
Publisher: MAC HIGHER
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Question
Chapter 21, Problem 26P
Interpretation Introduction
Interpretation:
Match the enzyme-enzyme function pairs.
Concept introduction:
In glycogen
Expert Solution & Answer
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Long explanations are not needed. Direct answers would suffice.
a. High concentration of glucose 6-phosphate is inhibitory to the enzyme hexokinase.
I. True
II. False
b. Which compound is formed when NAH reduces pyruvate (anaerobic condition)?
I. lactate
II. alpha-ketoglutarate
III. glucose
IV. oxaloacetate
1d. Glucagon increases blood glucose very quickly by activating phosphorylase. This is very efficient because phosphorylase:
a. Is a G-protein
b. Reduces cyclic-AMP
c. Has phosphodiesterase activity
d. Cleave the 1,6 branches
e. Acts at multiple 1,4 endings
1e. The intestinal equivalent of the hepatic 1,6 glucosidase is:
a. Isomaltase
b. Lactase
c. Beta-lactone
d. Phosphorylase A
e. Invertase
Choose the correct. Insulin inhibits this catabolic process:A. Conversion of protein to aminoacidsB. Conversion of aminoacids to proteinsC. Conversion of glucose to fatty acidsD. GlycogenesisE. Conversion of fatty acids to triglycerides
Chapter 21 Solutions
BIOCHEMISTRY W/1 TERM ACHEIVE ACCESS
Ch. 21 - Prob. 1PCh. 21 - Prob. 2PCh. 21 - Prob. 3PCh. 21 - Prob. 4PCh. 21 - Prob. 5PCh. 21 - Prob. 6PCh. 21 - Prob. 7PCh. 21 - Prob. 8PCh. 21 - Prob. 9PCh. 21 - Prob. 10P
Ch. 21 - Prob. 11PCh. 21 - Prob. 12PCh. 21 - Prob. 13PCh. 21 - Prob. 14PCh. 21 - Prob. 15PCh. 21 - Prob. 16PCh. 21 - Prob. 17PCh. 21 - Prob. 18PCh. 21 - Prob. 19PCh. 21 - Prob. 20PCh. 21 - Prob. 21PCh. 21 - Prob. 22PCh. 21 - Prob. 23PCh. 21 - Prob. 24PCh. 21 - Prob. 25PCh. 21 - Prob. 26PCh. 21 - Prob. 27PCh. 21 - Prob. 28PCh. 21 - Prob. 29PCh. 21 - Prob. 30PCh. 21 - Prob. 31PCh. 21 - Prob. 32PCh. 21 - Prob. 33PCh. 21 - Prob. 34PCh. 21 - Prob. 35PCh. 21 - Prob. 36PCh. 21 - Prob. 37PCh. 21 - Prob. 38PCh. 21 - Prob. 39PCh. 21 - Prob. 40PCh. 21 - Prob. 41PCh. 21 - Prob. 42PCh. 21 - Prob. 43PCh. 21 - Prob. 44PCh. 21 - Prob. 45PCh. 21 - Prob. 46P
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- Long explanations are not needed. Direct answers would suffice. a. In the TCA cycle, succinate dehydrogenase channels electrons directly into the electron transfer chain. I. True II. False b. Glucagon is a hormone that activates glycogenolysis. I. True II. Falsearrow_forward. Glucagon secretion causes inhibition of intracellular acetyl-CoA car- boxylase activity by several mechanisms. Name all you can think of.arrow_forwardLong explanations are not needed. Direct answers would suffice. a. Ribose-5-phosphate is produced by oxidative decarboxylation of 6-phosphogluconate catalyzed by the enzyme glucose-6-phosphate dehydrogenase. I. True II. False b. The pentose phosphate pathway occurs in the mitochondrion of tissues actively engaged in synthesis of fatty acids. I. True II. Falsearrow_forward
- a. In the TCA cycle, which of the following combines with acetyl CoA to form a 6-carbon compound? i. oxaloacetate ii. thiamine iii. glucose iv. pyruvate b. The last step in glycolysis is the transfer of phosphoryl group from phosphoenolpyruvate to ADP catalyzed by pyruvate kinase. i. True ii. Falsearrow_forwardLong explanations are not needed. Direct answers would suffice. a. Which of the following conditions would promote glycogenolysis? i. fasting ii. high carbohydrate meal iii. low glucagon levels iv. feasting b. Isocitrate loses two molecules of carbon dioxide and then undergoes oxidation to form alpha-ketoglutarate. i. True ii. Falsearrow_forwardTrue or False c. Glycogen synthase catalyzes the synthesis of α-1,6 linkages. True False d. The activated form of glucose is added to the non-reducing end of glycogen molecules. True Falsearrow_forward
- Long explanations are not needed. Direct answers would suffice. ***kind of in hurry so having the answer asap would greatly be appreciated, thank you :)) a. The first step in the pay-off phase of glycolysis is the oxidation of glyceraldehyde-3-phosphate to 1,3-bisphosphoglycerate. i. True ii. False b. Phosphofructokinase-1, the major flux-controlling enzyme of glycolysis is inhibited by _______. i. AMP ii. ATP iii. ADP iv. phosphoenol pyruvatearrow_forward1.a. Given what you know about glycolysis and gluconeogenesis, does it make sense that insulin activates PDH phosphatase? Why? b.How do vitamins increase to the breadth of chemical reactions available within a biological system?arrow_forwardIdentify the CORRECT statements regarding Ketones. SELECT ALL THAT APPLY A. Ketones are synthesized from excess pyruvate B. Ketones may be oxidized to yield cellular energy C. Ketogensis involves removal of coA (s-coa) groups D. Insulin promotes ketogenesisarrow_forward
- Butch Cassidy and the Sundance Kid. Glutamate dehydrogenase requires which of the following cofactors: a. NAD+/NADP+NAD*/NADP+ b. Pyridoxal phosphate c. Thiamine pyrophosphate d. Biopterinarrow_forwardIn 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.arrow_forwardCHOOSE THE CORRECT LETTER When glycogen is synthesized in both the liver and muscle, all the following are true, EXCEPT A.Glucose is transferred from UDP-glucose to a growing glycogen molecule by glycogen synthase.B. Phosphoglucomutase converts glucose 6-phosphate to glucose 1-phosphateC. Glucose 6-phosphate is converted to glucose by a phosphatase.D.Glucose 1-phosphate is activated by UDP-glucose pyrophosphorylase to produce UDP-glucose and PPi.arrow_forward
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