Module 8 Lab Report

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Dec 6, 2023

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Module 9 Lab Report Cellular Respiration You must download this form to your hard drive in order to save your answers Student Name: Part 1: Germination of Peas In the video Cellular Respiration in Germinating Peas, you observed the production of CO2 waste as in indicator of cellular respiration. Use the video and graph to answer the following questions. 1. What was the independe nt variable in the experimen t? Types of peas 2. What was the
dependen t variable? CO2 ppm 3. Why were 25 peas counted out for each trial? To have a constant variable 4. In Module 7 you measured O 2 levels in the form of bubbles to measure photosynt hesis, which is a form of metabolis m. In this module you measured CO 2 to determine metabolis m. If both experimen ts used plants to measure some form of
metabolis m, why was O 2 used in the last module and CO 2 is being used in this one? CO2 was used in this module to show the process of cellular respiration oxygen is a reactant in cellular respiration to produce CO2 while in photosynt hesis plants take in CO2 to produce oxygen. 5. Name two other environme
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ntal factors that you believe would be interesting or informativ e to test. a. Why did you select those variables? Temperatu re and pH I selected these because fluctuating
the temperatu re and pH of an environme nt can greatly affect the rate of cellular respiration . 6. Did temperatu re have an effect on the rate of respiration ? Explain your answer. Yes, because heat killed peas did not produce CO2 while cool killed
peas did but not a major amount 7. Did the heat-killed peas show any CO 2 productio n? Explain your answer No based on the graph there was little to no CO2 produced. 8. Why did the samples have to sit for 3 minutes with the sensor on before we could collect any data? So it could equilibrate .
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9. According to the graphed data, which environme ntal factor had the greatest impact on the rates of cellular respiration ? Temperatu re 10. Did the rate of cellular respiration in the cold peas keep
up with the room temperatu re peas? No, it was slightly below. 11. If peas were placed in a flask that was immersed in a warm water bath, what would you expect the rate of respiration to do? Increase Part 2: Virtual Labs 1. In th e vi rt ua l la b,
ye as t ar e be in g us ed to cr ea te a ne w bi of ue l. W ha t pr oc es s is be in g ca rri ed o ut by th e
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ye as t th at wi ll re su lt in a bi of ue l pr o d uc t? Fe r m en ta ti o n 2. W ha t is th e w as te pr
o d uc t th e re se ar ch er s ar e lo ok in g fo r? Gl uc os e, la cti c ac id, an d ox yg en w hil e ex er ci
si ng . 3. In th e m ea su ri ng ex er ci se la b, la cti c ac id is o ne of th e m et ab oli c w as te pr o d
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uc ts be in g m ea su re d. W he re is th e la cti c ac id co m in g fr o m ? A na er o bi c gl yc ol ys is.
4. W hy w o ul d ce lls pr o d uc e la cti c ac id in st ea d of C O 2 ? In or de r to gi ve yo ur b o dy , th
e en er gy it ne ed s d ur in g p hy si ca l ac tiv ity be ca us e th e ce lls ca n n ot ge t en o ug h ox yg
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en . 5. Ac co rd in g to th e gr ap h la cti c ac id pr o d uc ti o n in cr ea se s as th e gl uc os e le ve l
de cr ea se s. 6. Ac co rd in g to th e gr ap h ab ov e, La cti c ac id pr o
d uc ti o n in cr ea se s as gl uc os e le ve l de cr ea se s 7 Why does lactic acid increase suddenly and then taper off as Oxygen and Glucose levels remain fairly steady? It increases and remains steady because anaerobic respiration occurs when lactic acid is produced later while when oxygen increases aerobic respiration and lactic acid remain constant.
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The graph below represents the blood lactic acid levels of an athlete while running a 400 meter race. U s e t h i s g r a p h t o e x p l a i n w h a
t m e t a b o l i c p r o c e s s e s a r e o c c u r r i n g o v e r
t h e 6 0 s e c o n d r a c e . W h at m et a b ol ic pr oc es s/ es is m os t pr
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ev al e nt at p oi nt A ? P h os p h ag e n Whi ch 6. Oxygen consumption increase as the level of glucose decreases
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met abol ic proc ess/ es is mos t prev alen t at poin t B ? Oxid ativ e path way Poin t D is tow ards the end of the race . Nor mall y lacti c acid level s will drop
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over time . How do you expl ain the spik e in lacti c acid prod ucti on at the end of the race ? The spik e in lacti c acid can be expl aine d by the deve lop men t of
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lacta se in the mus cle it is burn ed at a high er rate whe n exer cisin g.
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