physcioEx 9.0 exercise 8

If you could post some of the questions, we'd be able to help you further.

Post Merge: 10 years ago

Actually, check out this thread. It should help you.

https://biology-forums.com/index.php?topic=79720.0

ANY help would be MUCH appreciated!!!

Activity 1 Assessing Starch Digestion by Salivary Amylase
1) describe the effect that boiling had on the activity of amylase. why did boiling have this effect? how does the effect of freezing differ from the effect of boiling
2) what is the purpose for including tube 3and what can you conclude from the result?
3)describe how you determined the optimal pH for amylase activity.
4) judging from what you learned in this activity, suggest a reason why salivary amylase would be much less active in the stomach.

Activity 2 Exploring Amylase Substrate Specificity
1) does amylase use cellulose as a substrate?
2) what effect did the addition of bacteria have on the digestion of cellulose
3) what effect did the addition of peptidase to the starch have? why?
4) what is the smallest subunit into which starch can be broken down

activity 3 Assessing Pepsin Digestion of Protein
1) describe the significance of the optimum pH for pepsin observed in the simulation and secretion of pepsin by the chief cells of the gastric glands.
2) would pepsin be active in the mouth? Explain your answer.
3) what are the subunit products of peptide digestion?
4) describe the reason for including control tube 4.

activity 4 Assessing Lipase Digestion of Fat
1) describe how lipase activity is measured in the simulation.
2) can you determine if fat hydrolysis occurred in tube 5? why or why not?
3) would pancreatic lipase be active in the mouth? why or why not?
4) describe the physical separation of fats by bile salts.

 

Then this thread will aid you greatly. Click on it: https://biology-forums.com/index.php?topic=50464.0

But those aren't the same questions... I haven't been able to find the answers to the ones I posted.

Please start a new topic!

Not all threads will have the same exact questions you've posted because people have different versions of the manual, but the last thread link I posted for you has at least ONE of the questions you asked. That is why I posted the link... You said any help would be appreciated, and that is something. I also found the answers to two of your other questions in this thread: https://biology-forums.com/index.php?topic=52411.msg146571#msg146571

doing a search is as easy as this

Assessing Pepsin Digestion of Protein