
Repaso unidad II
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15 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Cuál es el producto final de la glucólisis anaerobia en el músculo?
Etanol
CO₂
Lactato
Acetil-CoA
Answer explanation
En condiciones anaerobias, el piruvato se convierte en lactato para regenerar NAD⁺.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Cuántos ATP netos se obtienen por cada molécula de glucosa en la glucólisis anaerobia?
4
2
0
6
Answer explanation
Se producen 4 ATP, pero se consumen 2; la ganancia neta es de 2 ATP.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Qué enzima convierte piruvato en lactato?
Hexoquinasa
Lactato deshidrogenasa
Piruvato deshidrogenasa
Isocitrato deshidrogenasa
Answer explanation
La enzima lactato deshidrogenasa convierte piruvato en lactato.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Qué hormona estimula la gluconeogénesis?
Insulina
Glucagón
Cortisol
Testosterona
Answer explanation
El glucagón se activa durante ayuno y promueve la síntesis de glucosa.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Cuál es la función principal de la vía de las pentosas fosfato?
Generar energía
Oxidar glucosa completamente
Producir NADPH y ribosa-5-fosfato
Generar ATP
Answer explanation
Esta vía produce NADPH (antioxidante) y ribosa (para ácidos nucleicos).
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Qué enzima inicia la fase oxidativa de la vía de las pentosas?
Transaldolasa
Piruvato quinasa
Fosfofructoquinasa
Glucosa-6-fosfato deshidrogenasa
Answer explanation
La glucosa-6-fosfato deshidrogenasa genera NADPH.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Qué hormona activa la glucogénesis?
Glucagón
Cortisol
Insulina
Adrenalina
Answer explanation
La insulina promueve el almacenamiento de glucosa en forma de glucógeno.
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