Biol 1009 Lab Exercise 2 Enzyme Activity and Digestion of Carbohydrates and Proteins
Biol 1009 Lab Exercise 2 Enzyme Activity and Digestion of Carbohydrates and Proteins complete solutions correct answers key
Instructions: Respond to the following questions from lab exercise 2 using complete sentences (where appropriate). For more information about each question, see the lab manual.
Part A. Carbohydrate Digestion
Macerated coleoptiles, water, and Benedict’s solution
Is there a color change in the solution? Is this a positive or negative Benedict’s test?
Which substance was oxidized?
Which substance was reduced?
Do ungerminated corn seeds store sugar or starch?
What is responsible for the conversion of starch to sugar in a seedling?
Of what advantage to the plant is the presence of two forms of carbohydrates?
Part B: Protein Digestion
Pineapple and hard-boiled egg white
What happens to the egg white in the two tubes? Hint: you must carefully look at the edges of the cooked egg white.
What effect does boiling have on the enzyme bromelin?
Would you expect all enzymes to act similarly if they were boiled? Why?
Part C: Starch Digestion in Animals
Soda cracker and Benedict’s solution
Does a color change occur?
Is this a positive or negative test for a reducing sugar?
Saliva and Benedict’s solution
Does your saliva contain reducing sugar?
Does it contain starch?
Saliva, soda cracker, and Benedict’s solution
Does the partially digested cracker contain reducing sugar?
Does it contain starch?
What was responsible for the conversion of carbohydrate from one form to another?
Where in the body does the final digestion of carbohydrates occur?
Would you expect to find the digestion of protein and fats occurring in the mouth? Explain.
Biol 1009 Lab Exercise 2 Enzyme Activity and Digestion of Carbohydrates and Proteins
Name: Hannah Cuthbert Biol 1009 Lab Exercise 2: Enzyme Activity and Digestion of Carbohydrates and Proteins Instructions: Respond to the following questions from lab exercise 2 using complete sentences (where appropriate). For more information about each question, see the lab manual. ¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬ Part A. Carbohydrate Digestion Macerated coleoptiles, water, and Benedict’s solution 1. Is there a color change in the solution? Is this a positive or negative Benedict’s test? Yes, there was a color change in the solution. It turned reddish brown. This means it was a positive Benedict’s test. 2. Which substance was oxidized? Glucose was oxidized 3. Which substance was reduced? The cupric ion was reduced. Dry, ungerminated corn seeds Benedict’s solution 4. Do ungerminated corn seeds store sugar or starch? Ungerminated corn seeds sto...
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