Question

17. The 3-hydroxypropionate pathway is used primarily as a mechanism of degradation of sugars. biosynthesis of propionic acid. degradation of amino acids. carbon dioxide fixation 18 Which of the following groups of organisms often has an extended network of intracellular membranes? aerobic chemgheterotonhs. TATORA fernentes chemolithographs anaerobic chemoheterozaphs The following image shows a summary of the process of fermentation in yeast. 19. PRADH? Pyruvate CH, 2 Acetaldehyde 2 Ethat How would a yeast cell get the reducing power and the carbon it might need for biosynthetic reactions when it is gou de fermentative conditions? It would use some NADH from glycolysis and not convert all of the prunate to ethanol It would fis some of the Co that is formed and use reverse electron flow to make NEDE. It would convert the pyruvate the acest-CoA and make more NADH om die citric acid cycle. It would take up the ethanol and use it as a carbon source for ATP formation and oxdation. ted Which of de following is not commonly used as an electron accepter during Yespiration gerobic PRO

Answer 1

Q. 17- option d) carbon dioxide fixation is the correct answer.

The 3-hydroxypropionate is used primarily as a mechanism of carbon dioxide fixation. The 3-hydroxypropionate pathway is a mechanism that allows some specific bacteria to create 3-hydroxypropionate utilizing carbon dioxide. In this 3-hydroxypropionate pathway carbon dioxide is fixed with action or help of two enzymes, i.e. Acetyl CoA Carboxylase and propionyl CoA Carboxylase.