How is gluconeogenesis kept functionally separate from glycolysis?a) This statement is false, the two pathways are not kept separate but rather run in parallel in alltissues at all timesb) The two pathways involve all the same enzymes but the pathways are separated throughrestriction to different organelles and cell compartments.c) The two pathways involve all the same enzymes but the pathways are separated throughrestriction to different tissues.d) The two pathways involve only some of the same enzymes, with further separation created byorganelles and cell compartments, tissue specificity and reciprocal regulation.e) None of the above
Question
How is gluconeogenesis kept functionally separate from glycolysis?a) This statement is false, the two pathways are not kept separate but rather run in parallel in alltissues at all timesb) The two pathways involve all the same enzymes but the pathways are separated throughrestriction to different organelles and cell compartments.c) The two pathways involve all the same enzymes but the pathways are separated throughrestriction to different tissues.d) The two pathways involve only some of the same enzymes, with further separation created byorganelles and cell compartments, tissue specificity and reciprocal regulation.e) None of the above
Solution
Para responder a esta pregunta, es importante entender cómo se regulan y separan funcionalmente las vías de gluconeogénesis y glucólisis en el cuerpo. Vamos a analizar cada opción:
a) Esta afirmación es falsa. Las dos vías no corren en paralelo en todos los tejidos en todo momento. La regulación de estas vías es crucial para evitar un ciclo fútil.
b) Esta opción es incorrecta. Aunque algunas enzimas son compartidas entre las dos vías, no todas las enzimas son las mismas. Además, la separación no se basa únicamente en la restricción a diferentes orgánulos y compartimentos celulares.
c) Esta opción también es incorrecta. No todas las enzimas son las mismas en ambas vías, y la separación no se basa únicamente en la restricción a diferentes tejidos.
d) Esta es la opción correcta. Las dos vías comparten algunas enzimas, pero también tienen enzimas únicas que son específicas para cada vía. Además, la separación funcional se logra a través de la especificidad de los tejidos, la compartimentación en orgánulos y compartimentos celulares, y la regulación recíproca de las enzimas clave.
e) Esta opción es incorrecta porque la opción d) es correcta.
Por lo tanto, la respuesta correcta es:
d) The two pathways involve only some of the same enzymes, with further separation created by organelles and cell compartments, tissue specificity and reciprocal regulation.
Similar Questions
Which two processes depend on glucose being able to exit the cell where they occur?Group of answer choicesfermentation and glycogenolysis in the musclegluconeogenesis and glycogenolysis in the liverglycolysis and gluconeogenesis in the liverglycolysis and glycogen synthesis in the liver
All of the following enzymes involved in glycolysis are also involved in gluconeogenesis except:Group of answer choicesaldolasephosphofructokinase-1enolasephosphoglycerate kinase
Gluconeogenesis refers to: A) the biosynthesis of glycogen by glycogen synthase B) the process by which pyruvate is converted to glucose C) the breakdown of glycogen D) the oxidation of glucose E) the conversion of pyruvate to lactate
Gluconeogenesis, must bypass irreversiblereactions of glycolysis, except:a. Hexokinaseb. Phosphohexose isomerasec. Pyruvate kinased. Phosphofructokinase
GLUTs are integral membrane proteins that assist in the facilitated diffusion of glucose into and out of cells. What reaction in glycolysis prevents glucose from being transported back out of the cell?A. Hexokinase phosphorylates glucose using ADP, creating a glucose molecule that can’t cross the hydrophobic interior of the plasma membrane.B. Hexokinase dephosphorylates glucose using ATP, creating a glucose molecule that can’t cross the hydrophilic portion of the plasma membrane.C. Hexokinase dephosphorylates glucose using ADP, creating a glucose molecule that can’t cross the hydrophilic portion of the plasma membrane.D. Hexokinase phosphorylates glucose using ATP, creating a glucose molecule that can’t cross the hydrophobic interior of the plasma membrane.
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