Biology lab work 4 assistance



UMUC Biology 102/103

Lab 4: Enzymes






·         On your own and externally foundation, finished this Lab 4 Answer Sheet electronically and surrender it via the Assignments Folder by the age listed in the Course Schedule (underneath Syllabus).


·         To guide your laboratory exercises, use the Laboratory Manual located belowneathneath Course Content. Read the induction and the directions for each exercise/test carefully antecedently completing the exercises/experiments and sympathetic the questions.


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


·         You should surrender your instrument as a Word (.doc or .docx) or Rich Text Format (.rtf) refine for best compatibility.






Pre-Lab Questions




  1. How could you touchstone to see if an enzyme was finishedly saturated during an test?






  1. List three stipulations that would vary the life of an enzyme. Be peculiar after a while your exposition.






  1. Take a observe about your issue and confirm issuehold products that fruit by resources of an enzyme. Name the products, and declare how you understand they fruit after a while an enzyme.








Experiment 1: Enzymes in Food






Data Tables and Post-Lab Assessment


Table 1: Substance vs. Starch Presence


Table 1: Substance vs. Starch 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 moderates for this test? What did they manifest? Why was saliva moderate in this test?




  1. What is the part of amylase? What does amylase do to starch?




  1. Which of the foods that you touchstoneed incloseed amylase? Which did not? What testal deposition foundations your pretension?




  2. Saliva does not inclose amylase until babies are two months old. How could this desire an infant’s sortive requirements?




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




  1. Digestive enzymes in the gut grasp proteases, which sort proteins. Why don’t these enzymes sort the stomach and feeble interior, which are imperfectly tight of protein?






Experiment 2: Effect of Atmosphere on Enzyme Life




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 substance catalyzed in this test?


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


  3. What is the fractions mutable in this test? What is the relative mutable?


  4. How does the atmosphere desire enzyme part? Use deposition from your basis to foundation your apology.


  5. Draw a graph of balloon transection vs. atmosphere. What is the mutuality?


  6. Is there a indirect moderate in this test? If yes, confirm the moderate. If no, allude-to how you could amend the test to grasp a indirect moderate.


  7. In public, how would an growth in substrate vary enzyme life? Draw a graph to paint this correlativeness.


  8. Design an test to mention the optimal atmosphere for enzyme part, finished after a while moderates. Where would you furnish the enzymes for this test? What substrate would you use?