Question

Yogurt is made by growing bacteria, such as Lactobacillus that produce lactic acid as they grow in a solution with sugar mik. The acid gives the mixture its sour flavor (and keeps your intestines healthy) (a). (1 point) What is the terminal electron acceptor used by Lactobacillus in this pathway? (b). (1 point) For each glucose molecule used by kdctobacillus this pathway, how many NADH molecules are generated? (c) (1 point) For each glucose molecule used by Lactobacillus this pathway, how many ATP molecules are generated? In three sentences (or less!), describe how fermentation prevents bacterial cell death in Lactobacillus (3 points) the fermentat or ApT th& mede olenth, Jactobacilus Culcl for owe apt voith O2 1OA oas nat forned Pnght of O2 EXTRA CREDIT (2 points) Describe how the Lactobacilus could still survive if the sugar was used and only milk proteins remained. aun fommed Lnctors or hey Cout ld sH'lldivinggugor Aautre tht ard pake good pro teins Little Charlotte came into class as our living case study. She presented with red, itchy, swollen eyes and a watery and cloudy discharge. Assuming this is a bacterial infection, answer the following questions Is this bacteria most likely Gram-positive or Gram.negative? (cirele one) (1 point) Describe what types of features this bacteria would mosty tkely have. Be sure to explain your choices. (2 points) Lis this most hikely gramb6Stive beuuc Lon lel Aie wth ba Temptee S erratia marcecens b 14

Answer 1

oxygen is used as the terminal electron acceptor in the electron transport chain.

3 NADH are produced

2 ATP are produced

GLUCOSE ATP ADP Glucose-6-P NAD NADH 6-Phosphogluconate NAD NAD+H CO2 Ribulose-5-phosphate Xylulose-5-phosphate Pi phosphoketolase Glyceraldehyde-3-P Pi Acetyl-phosphate CoA NAD NAD+2H+ Pi Acety 1-CoA 1,3-Diphosphoglycerate ADP NADH+H NAD ATP CoA Acetaldehyde 3-Phosphoglycerate NADH H+ NAD+ 2-Phosphoglycerate ETHANOL H2O Phosphoenolpyruvate ADP ATP Pyruvate NADH 2H+ NAD LACTATE