
Le fermentazioni
Authored by Marcello Vallone
Chemistry
1st Grade
Used 16+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Gli organismi chemiotrofi ottengono energia da:
Luce solare
Acido piruvico
Composti chimici
Respirazione
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
La fermentazione acetica:
Viene svolta da batteri anaerobi
Avviene una sola reazione di ossidazione
C'è prima una riduzione e poi un'ossidazione
Nei prodotti si formano quattro molecole di acqua per ogni molecola di etanolo
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Un sottoprodotto della fermentazione butirrica è:
Acetone
Acido pirovico
Acido propionico
Etanolo
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Nella fermentazione propionica si produce:
Acido propionico
CO2
Acido acetico
Tutte le precedenti
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
L'imbrunimento enzimatico dipende da:
Temperatura
Presenza polifenolossidasi
Presenza di sostanze fenoliche
Tutte le precedenti
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Nella fermentazione mannitica a che T° l'attività dei saccaromiceti del mosto viene ostacolato e poi interrotto ?
T° > 39°
T° > 38°
T° > 36°
T°> 33°
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual'è la fermentazione più utilizzata dai microrganismi per ottenere energia ?
Alcolica
Omolattica
Acetica
Lattica
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