Questions: 4. El destino del piruvato (producto de la glicólisis) en un ambiente aerobio es

4. El destino del piruvato (producto de la glicólisis) en un ambiente aerobio es
Transcript text: 4. El destino del piruvato (producto de la glicólisis) en un ambiente aerobio es
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Solution

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La respuesta es la primera: el piruvato se convierte en acetil-CoA y entra en el ciclo de Krebs.

Explicación de cada opción:

  1. El piruvato se convierte en acetil-CoA y entra en el ciclo de Krebs.

    • Correcto. En condiciones aerobias, el piruvato producido en la glicólisis es transportado a la mitocondria, donde es convertido en acetil-CoA por la enzima piruvato deshidrogenasa. El acetil-CoA luego entra en el ciclo de Krebs (o ciclo del ácido cítrico), donde se oxida para producir NADH, FADH2 y ATP.

  2. El piruvato se convierte en lactato.

    • Incorrecto. Esta conversión ocurre en condiciones anaerobias, cuando no hay suficiente oxígeno disponible. En este caso, el piruvato se convierte en lactato mediante la fermentación láctica para regenerar NAD+ y permitir que la glicólisis continúe.

  3. El piruvato se convierte en etanol.

    • Incorrecto. Esta conversión es típica de la fermentación alcohólica, que ocurre en algunos microorganismos como las levaduras en condiciones anaerobias. El piruvato se convierte en etanol y dióxido de carbono.

  4. El piruvato se convierte en glucosa.

    • Incorrecto. La conversión de piruvato a glucosa ocurre en la gluconeogénesis, un proceso que tiene lugar principalmente en el hígado y los riñones, pero no es el destino principal del piruvato en condiciones aerobias.

Resumen: En un ambiente aerobio, el destino del piruvato es convertirse en acetil-CoA y entrar en el ciclo de Krebs para continuar con la producción de energía.

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