
Understanding the Krebs Cycle
Authored by Luis Rosales León
Health Sciences
University

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12 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
¿Cuál es el primer paso en la formación del ácido cítrico?
Descarboxilación de alfa-cetoglutarato
Condensación de acetil-CoA y oxaloacetato para formar citrato.
Conversión de citrato a isocitrato
Formación de piruvato a partir de glucosa
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Qué molécula se combina con acetil-CoA para formar ácido cítrico?
citrato
oxaloacetato
piruvato
malato
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Cuál es la importancia del NADH en el ciclo de Krebs?
El NADH es significativo en el ciclo de Krebs ya que actúa como transportador de electrones, facilitando la producción de ATP.
El NADH se utiliza para sintetizar glucosa durante el ciclo de Krebs.
El NADH es un subproducto del ciclo de Krebs que no tiene papel en la producción de ATP.
El NADH se convierte directamente en piruvato en el ciclo de Krebs.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How many NADH molecules are produced per turn of the Krebs cycle?
3
4
2
5
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Qué papel juega el NADH en la respiración celular?
El NADH se utiliza para transportar oxígeno en las células.
El NADH es un subproducto de la síntesis de ATP.
El NADH produce directamente glucosa durante la respiración.
El NADH actúa como un transportador de electrones que dona electrones a la cadena de transporte de electrones, facilitando la producción de ATP.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which enzyme catalyzes the conversion of citrate to isocitrate?
Malate dehydrogenase
Citrate synthase
Aconitase
Fumarase
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What factors can regulate the enzymes of the Krebs cycle?
Substrate availability, product inhibition, allosteric regulation, covalent modifications, and energy status of the cell.
Temperature fluctuations
pH changes
Presence of oxygen
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