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Exercício de Mitocondrias e Repiração celular

por Dri (PUC-SP) Fácil Tuesday, May 11th, 2010

Exercício:

Estão abaixo esquematizados, de forma simplificada, dois processos bioquímicos:

A: glicose-> ácido piruvico -> ácido láctico

B: gicose -> ácido pirúvco -> acetil-coenzima A ->ciclo de krebs.

a)Como são denominados os processos A e B?

B)Compare os dois processos quanto ao rendimento energético que fornecem (numero de mols de ATP produzido).

C) Em uma célula muscular, onde ocorrem os processos A e B?

Informações Adicionais:


Respostas:

10 Respostas a “Mitocondrias e Repiração celular”

Mari Teixeira diz:

a)   A – Respiração anaeróbica; B- respiração aeróbica.
b)   Na respiração anaeróbica só a síntese de 4 ATP, entretanto para ela acontecer são usados 2 ATP, portatanto, pode-se dizer que a respiração anaeróbica tem saldo final de 2 ATP. Já a respiração aeróbica, tem saldo final de 36 ou 38 ATP, depende de que parte do corpo é a célula.
c) Na muscular ocorrem ambos os processos, porém em situações distintas. Quando o músculo está em situação normal ele faz respiração aeróbica, mas quando está em trabalho intenso, ele faz a fermentação (resp. anaeróbica).
 

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