Bio Lab 3 Lab Report 7 Cellular Respiration

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Lab Report - Page 1 © Access Learning Systems BioLab 3 Lab Report 7 Cellular Respiration Lab Report I. The ATP Cycle Complete the chart below: Letter Defining Term A Energy from food (input) B atp C Energy for cells (output) D adp II. Anaerobic Respiration EXERCISE 1 – Alcoholic fermentation At intervals of 20, 40, and 60 minutes, the tubes are removed. Record the volume of gas produced in each fermentation tube. Each tube is graduated in tenths of a milliliter. ( HINT: Look at the amount of gas, not the level of the liquid. ) Tube Solution Gas Volume in ml after: 20 min. 40 min. 60 min. 1 10% glucose + yeast 1.4 3.5 5 2 1% starch + yeast 0 .5 .5 3 1% starch + yeast + amylase .5 1.5 2.5 • What gas accumulated in the calibrated portion of the fermentation tube? Hydrogen and carbon • What metabolic pathway is utilized by yeast cells? Anaerobic because fermintation took place without oxygen • Why was amylase added to the third test tube? Because amylayse enzyme catalyzes the reaction in starch that breaks down to glucose • Did respiration occur in the beaker containing yeast and starch? Why? No, because yeast need amylase to break starch down III. Aerobic Respiration
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