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![Main products of yeast fermentation
The main products of yeast fermentation are (Check all
that apply)
Check All That Apply
alcohol
FADH
CO
CO2
lactic acid
NAD+
NADH
pyruvate](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc8e7ac96-8d16-46f1-8989-55716727cd4a%2F2f18893d-6fd7-4561-bdfa-f944fba5d0fa%2F0yvtdn4k_processed.jpeg&w=3840&q=75)
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- What is the end product of anaerobic respiration of yeast? O Pyruvate O Lactate O Alcohol O GlucoseAnaerobic production of ethanol by Saccharomyces cerevisiae is associated with yeast growth. The steady-state growth kinetics of yeast follows Monod. It is intended to produce 10 kg/h of ethanol in an ideal CSRT-type fermenter, fed by a solution of 50 g/L of glucose. Size the fermenter for this purpose (calculate its working volume), setting the biomass concentration at the exit of the fermenter at 6.9 g/L.Note: CSTR = Continuous Stirred Tank ReactorData: μmax = 0.1 h-1; Ks = 0.5 g/L; YX/S = 0.15; YP/S = 0.45.(answer: V = 5435 L)Anaerobic production of ethanol by Saccharomyces cerevisiae is associated with yeast growth. The steady-state growth kinetics of yeast follows Monod. It is intended to produce 10 kg/h of ethanol in an ideal CSRT-type fermenter, fed by a solution of 50 g/L of glucose. Size the fermenter for this purpose (calculate its working volume), setting the biomass concentration at the exit of the fermenter at 6.9 g/L.
- This is a linear biochemical pathway 2 ATP + HCO₂ + NH₂ 2 ADP, PCPS-1 H₂N OPO, NH₂ CH₂ CH₂ CH₂ HỘ NHĨ coo 1 H₂N NH₂ 7 True False ARG1 P отс fessels. çoo CH HC 5 Sassets. ASL NH₂ HỘ NHỎ ASS N_y_coo NH CHI CH₂COO CH₂ CH₂ HỘ NHỎ coo 4 ATP PP L-Asp AMP 1 L-ornithine 2 carbamoyl phosphate 3 L-citrulline 4 argininosuccinate 5 fumarate 6 L-arginine 7 urea L-Asp L-aspartate CPS-1 carbamoyl phosphate synthetase I OTC Ornithine transcarbamoylase ASS argininosuccinate synthetase ASL argininosuccinate lyase ARG1 arginase 1 OH OH NH₂waste product of anaerobic respiration by animal cells seous product of the Krebs cycle udent set up the apparatus shown below, one with germinating seeds and one with dry seeds. The ssium hydroxide (KOH) in each tube will absorb any carbon dioxide in the test tube so that carbo ide released will not affect the volume of gas in the test tube. This ensures that the volume of gen gas in the test tube is the variable being measured. student left the apparatus for 30 minutes in a warm, dark room and then measured the location c droplet of dye. What are the expected results? t tube A dry seeds -KOH d Test tube B Time left 1:01 germinating seeds -KOH lect one: a. In test tube B, the droplet moved to the left, indicating that oxygen was used by the germinatim seeds as they were growing. b. In test tube the droplet moved to the left, indicating that oxygen was released by the dry seeds. 40 Oc. In test tube B, the droplet moved to the left, indicating that oxygen was released by the germinating…The yeast S.cerevisae is cultivated for ethanol production in a 10000 L fermenter operated continuously at steady state. The reactor is fed by a 50 g/L of sucrose, with a feed flow of 400 L/h. Assuming that the yeast growth kinetics follow the Monod model and using the following information:Data: μmax= 0.1h-1 ; Ks=0.5g/L; Yx/s=0.15 g/g; Yp/s=0.45g/g. a) What are the concentrations of biomass, sucrose and ethanol at the exit of the fermenter?b) Calculate the productivity in ethanol (Pp) and sketch the curve of variation of Pp vs. dilution rate.c) In terms of ethanol productivity, would it be more or less advantageous if the reactor were operated with a feed rate of 1200L/h? Justify.
- Beer production requires an early period of rapid aerobic metabolismof glucose by yeast. Given that anaerobic conditions are necessary toproduce alcohol, can you explain why this step is necessary?It is required to recover active extracellular enzymes from a completed fermentation mediumthat also consists of proteins (<200,000 molecular weight cut-off (MWCO)) and bacterial cells (1-2μm). A cross-flow 0.35 μm microfiltration (MF) with retentate recycled back to the fermenter willbe used over a period of 5 hours during which time flux is assumed to decline linearly. After 5 hours, assuming 95% of the bacteria are retained and given the additionalinformation below, what is the concertation of bacteria remaining in the fermenter and what area,in m2 , of MF membrane is needed? Initial bacterial concentration = 1.2 gdcw /L (dcw = dry cell weight)Volume of medium at the beginning = 15 m3Volume of medium left in the fermenter after 5 hours filtering = 1 m3Initial (starting flux) = 6.5 x 10-5 m sec -1Final flux (after 5 hours of filtering) = 3.9 x 10-5 m sec -Choose all that are correct regarding impeller type choice in bioreactors. O Marine type impellers are ideal for shear sensitive mammalian cells. O Marine type impellers are ideal for less shear sensitive yeast cells. O One function of the impeller is to mix the contents of the bioactor (e.g., nutirents). O None of these options are true. O Impeller type choice depends on the shear sensitivity of the target cells and the solution viscosity. Choose all that are true regarding the phases of cell growth in a bioreactor. O None of these options are true. O There will always be a death phase in the bioreactor, since some cells are dying throughout. O Higher variability in the bioreactor contents is associated with stationary phase. O Higher varaibility in the bioreactor contents is associated with exponential phase when the cells are growing most rapidly. O There will always be a lag phase of growth in a bioreactor since the cells need time to adjust to their new enviroment upon…
- The main products of yeast fermentation are (Check all that apply) Check All That Apply alcohol FADH CO CO2 lactic acid NAD+ NADH pyruvateroblem 1An aerobic biochemical process uses a CSTR w/o recycle. The feed characteristics are asfollows: Influent substrate concentration, So = 200 mg/L; half- velocity coefficient, Ks = 50mg/L; maximum, specific substrate utilization rate, k = 5 g/g- day; yield coefficient, Y = 0.5g Xa/g substrate consumed; microorganism decay coefficient, b = 0.10 day-1.1. The process goal is the production of active biomass. Determine the hydraulicretention time that the reactor should be operated in order to maximize the reactoractive biomass concentration (Xa). How does this retention time compare with theminimum solids retention time that the system can theoretically be operated?Calculate the solids retention time safety factor.2. Based on the solids retention time for maximum Xa calculated above, estimate theactive biomass concentration (Xa) and the substrate removal efficiency (E, %)10_UG_26563_ch09_167-184.indd 175 Press esc to exit full screen Yeast Fermentation The unicellular fungus Saccharomyces cerevisiae is used in the food industry to ferment sugars. The rate of fermentation is measured by CO₂ production. The addition of inorganic phosphate increases this rate. THINK Answer this question individually: 1. Why does the fermentation of sugars, such as glucose and fructose, depend upon the presence of P? PAIR Answer the following questions with a partner: 2. Which glycolytic reactions require P? 3. Several glycolytic intermediates contain phosphate. Where did these groups come from during the reactions? SHARE 4. How much P, is required to generate one CO₂? As a class, discuss the following questions: 5. Is CO₂ generation the most reliable way to measure ethanol fermentation? Why or why not? HANDOUT 175 23/03/17 2:02 pm Page 1 of 4 ...... ZOOM + K
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