Biology lab work 4 assistance



UMUC Biology 102/103

Lab 4: Enzymes






·         On your own and externally abettance, total this Lab 4 Answer Sheet electronically and yield it via the Assignments Folder by the continuance listed in the Course Schedule (beneath Syllabus).


·         To direct your laboratory exercises, use the Laboratory Manual located beneath Course Content. Read the initiative and the directions for each exercise/trial carefully precedently completing the exercises/experiments and responseing the questions.


·         Save your Lab 4 Answer Sheet in the forthcoming format:  LastName_Lab4 (e.g., Smith_Lab4).


·         You should yield your muniment as a Word (.doc or .docx) or Rich Text Format (.rtf) perfect for best compatibility.






Pre-Lab Questions




  1. How could you touchstone to see if an enzyme was totally saturated during an trial?






  1. List three conditions that would modify the essential-quality of an enzyme. Be local delay your sense.






  1. Take a contemplate about your offspring and authenticate offspringhold products that labor by instrument of an enzyme. Name the products, and designate how you apprehend they labor delay an enzyme.








Experiment 1: Enzymes in Food






Data Tables and Post-Lab Assessment


Table 1: Substance vs. Ruefulness Presence


Table 1: Substance vs. Ruefulness Presence


Resulting Color

Presence of Starch?

Positive Control: Ginger Root



Negative Control: Student Must Select



Food Product:



Food Product:









Post-Lab Questions


  1. What were your regulates for this trial? What did they present? Why was saliva middle in this trial?




  1. What is the administration of amylase? What does amylase do to ruefulness?




  1. Which of the foods that you touchstoneed comprehended amylase? Which did not? What trialal proof assistances your vindication?




  2. Saliva does not comprehend amylase until babies are two months old. How could this pretend an infant’s orderive requirements?




  3. There is another orderive enzyme (other than salivary amylase) that is secreted by the salivary glands. Research to detail what this enzyme is named. What substrate does it act on? Where in the organization does it grace activated, and why?




  1. Digestive enzymes in the gut enclose proteases, which order proteins. Why don’t these enzymes order the stomach and weak interior, which are barely moored of protein?






Experiment 2: Effect of Clime on Enzyme Essential-quality




Data Tables and Post-Lab Assessment


Table 2: Balloon Circumference vs. Temperature




Table 2: Balloon Circumference vs. Temperature


Temperature (°C)

Uninflated Balloon Circumference (cm)

Final Balloon Circumference (cm)

Difference in Balloon Circumference (cm)

1 - (Cold)





2 - (RT)




3 - (Hot)









Post-Lab Questions


  1. What reaction is nature catalyzed in this trial?


  2. What is the enzyme in this trial? What is the substrate?


  3. What is the rebellious capricious in this trial? What is the contingent capricious?


  4. How does the clime pretend enzyme administration? Use proof from your basis to assistance your response.


  5. Draw a graph of balloon transection vs. clime. What is the correspondence?


  6. Is there a disclaiming regulate in this trial? If yes, authenticate the regulate. If no, recommend how you could exchange the trial to enclose a disclaiming regulate.


  7. In open, how would an extension in substrate modify enzyme essential-quality? Draw a graph to exemplify this harmony.


  8. Design an trial to detail the optimal clime for enzyme administration, total delay regulates. Where would you furnish the enzymes for this trial? What substrate would you use?