Question

20-21. The yeasts utilize the Embden-Meyerhof pathway of metabolism and produce major end products of and from glucose metabolism. 22-23. Bacteria that use the same pathway as the previous question and produce are called (prefix) fermentative lactic acid bacteria. 24-27. (Prefix) pathway and produce as the chief end product fermentative lactic acid bacteria utilize the pentose shunt (hexose monophosphate) ,andas end products in more or less equal amounts. 28-29. Name one yeast (genus and species) that ferments lactose and one that does not. 28. 29. 30. Describe a use for the melibiose medium based on your results (scan Exercise 30 to help with this question) What lessons can be learned from the Boeing plane crash events that can be applied to improve the safety of fresh and manufactured food products.

Answer 1

Answer The yeast utilize the Embden Meyerhoff pathway of metabolism and produce major end product of ethanol and Carbon Dioxide from glucose metabolism.

Bacteria that uses the same pathway as the previous question and produces Lactic acid as chief end product are called Homo fementative lactic acid bacteria.

Heterofermantative lactic acid bacteria utilizes the pentose shunt [hexose monophosphate] pathway and produce Lactate, Carbon dioxide and ethanol as end product in more or less equal amounts.

Yeast ferment lactose = Kluveromyces fragilis

Yeast that do not ferment lactose = Saccharomyces cerevisiae