BIOCHEMISTRY
9th Edition
ISBN: 2818440090622
Author: BERG
Publisher: MAC HIGHER
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Chapter 23, Problem 8P
Interpretation Introduction
Concept introduction:
Transamination is also known as an amino transfer. It is a
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2A. Red blood cells synthesize and degrade 2,3-bisphosphoglycerate (2,3-BPG) by a detour of the
glycolytic pathway, as shown below:
glyeeraldehyde 3-phosphate
GAP dehydrogenase
1,3-bisphosphoglycerate
bisphosphoglycerate mutase
ADP
phosphoglycerate kinase
2,3-bisphosphoglycerate
ATP
3-phosphoglycerate
2,3-bisphosphoglycerate phosphatase
phosphoglycerate mutase
2-phosphoglycerate
(i) The bisphosphoglycerate mutase/2,3-bisphosphoglcerate phosphatase reaction is catalyzed by a single enzyme,
BPGM. At alkaline pH, BPGM favors the mutase activity while at lower pH, BPGM favors the phosphatase
reaction. Use this information, along with the Bohr effect, to explain in the space below how red blood cells
respond to a metabolic defect where a patient experiences chronic, elevated levels of lactic acid. I
(ii) Individuals with red blood cell phosphoglycerate kinase deficiency suffer from moderate hemolytic anemia (a
condition where red blood cells self-destruct before their normal lifespan). They…
I'm confused about glycolysis and gluconeogenesis.
Question:
What is the function of glyceraldehyde 3-phosphate dehydrogenase?
Is it because of
-> The incorporation of a phosphate from ATP and reduction of glyceraldehyde 3-phosphate
or
->The incorporation of phosphate from inorganic phosphate and reduction of glyceraldehyde 3-phosphate.
or
-> The incorporation of phosphate from inorganic phosphate and oxidation of glyceraldehyde 3-phosphate
. Glucagon secretion causes inhibition of intracellular acetyl-CoA car-
boxylase activity by several mechanisms. Name all you
can think of.
Chapter 23 Solutions
BIOCHEMISTRY
Ch. 23 - Prob. 1PCh. 23 - Prob. 2PCh. 23 - Prob. 3PCh. 23 - Prob. 4PCh. 23 - Prob. 5PCh. 23 - Prob. 6PCh. 23 - Prob. 7PCh. 23 - Prob. 8PCh. 23 - Prob. 9PCh. 23 - Prob. 10P
Ch. 23 - Prob. 11PCh. 23 - Prob. 12PCh. 23 - Prob. 13PCh. 23 - Prob. 14PCh. 23 - Prob. 15PCh. 23 - Prob. 16PCh. 23 - Prob. 17PCh. 23 - Prob. 18PCh. 23 - Prob. 19PCh. 23 - Prob. 20PCh. 23 - Prob. 21PCh. 23 - Prob. 22PCh. 23 - Prob. 23PCh. 23 - Prob. 24PCh. 23 - Prob. 25PCh. 23 - Prob. 26PCh. 23 - Prob. 27PCh. 23 - Prob. 28PCh. 23 - Prob. 29PCh. 23 - Prob. 30PCh. 23 - Prob. 31PCh. 23 - Prob. 32PCh. 23 - Prob. 33PCh. 23 - Prob. 34PCh. 23 - Prob. 35PCh. 23 - Prob. 36PCh. 23 - Prob. 37PCh. 23 - Prob. 38PCh. 23 - Prob. 39PCh. 23 - Prob. 40PCh. 23 - Prob. 41PCh. 23 - Prob. 42PCh. 23 - Prob. 43PCh. 23 - Prob. 44PCh. 23 - Prob. 45PCh. 23 - Prob. 46PCh. 23 - Prob. 47PCh. 23 - Prob. 48PCh. 23 - Prob. 49P
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- fill in the blanks The pyruvate dehydrogenase complex is primarily regulated at the ( ) which has a ( ) prosthetic group.arrow_forwardDescribe the impact of phosphorylation of glycogen phosphorylase on its heterotropic regulation. (Don’t need the structural details; focus on the qualitative effects on allostery; be brief and to the point)arrow_forwardOd. Vitamin B2 s page Hexokinase catalyzes phosphorylation of glucose to clucose-6-phosphate, where ATP is used as a donor of phosphate group, this an example of: Select one: NAVIGATION a. Oxidoreductase b. Ligase c. Lyase d. Transferase Next pagearrow_forward
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- In class, I mentioned that fructose is metabolized differently in the liver compared to glucose. Refer to the figure shown below to calculate the number ofATPs you would expect from the metabolism of fructose in the liver. Show your work! Fructokinase Fructose Fructose-1-P АТР ADP Aldolase B Dihydroxy- acetone phosphate Glyceraldehyde АТР Triose kinase Triose phosphate isomerase ADP 4 - Glyceraldehyde-3-P Glycolysis Руruvate Acetyl-CoA Fatty acids and triglyceridesarrow_forwardRequired partner. Aminotransferases require which of the following cofactors: a. NAD+/NADP+NAD+/NADP+ b. Pyridoxal phosphate c. Thiamine pyrophosphate d. Biopterinarrow_forwardHelp me understand this…I’m confusedarrow_forward
- in the synthesis of glycogen, the glycogen synthase uses UDP-glucose rather than glucose. Explain in detail way.arrow_forwardX INCORRECT; see section 13.1 Enzymes occasionally display weak "“side" activities. Draw the structure of the product (other than ADP) of the reaction that results when pyruvate kinase, operating in reverse, uses lactate as a substrate. For your structure: 1. Do not include primary or secondary hydrogens. CH2 HO OH Edit Drawingarrow_forwardLong 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. oxaloacetatearrow_forward
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