Biology Quiz for Enzyme Lab

Question 1: The molecules that enzymes combine with and convert into other molecules are _____ ?

[] (a) Bile Salts
[] (b) Catalysts
[] (c) Indicator dyes
[] (d) Products
[] (e) Substrates
[] (f) Don't know

Question 2: A positive test for starch was indicated by formation of __________:

[] a Blue / black with Iodine
[] b Bubbles / heat with catalase
[] c Dissapearance of egg albumin
[] d Orange / red with Benedicts
[] e Peach / yellow with phenol red
[] Don't know

Question 3: Pepsin digested proteins most rapidly when the pH was neutral.

[] True (Correct answer)
[] False (Wrong answer)
[] Don't know

Question 4: A pH value of _____ has 100 times more hydrogen ions than pH 7.0?

[] 1
[] 5
[] 9
[] 22
[] 700
[] 7000
[] 1,312
[] Don't know

Question 5: Which enzyme digested hydrogen peroxide into Oxygen bubbles and water, releasing heat in the process?

[] Amylase
[] Catalase
[] Lipase
[] Pepsin
[] Trypsin
[] Don't know

Question 6: Which environmental factor "denatured" catalase ?

[] (a) Cooking
[] (b) Low pH
[] (c) NaOH
[] (d) H2O2
[] (e) Don't know

Question 7: A change in the indicator dye phenol red from pink to yellow indicated:

[] (a) the production of Hydrogen ions
[] (b) a lowering of the pH value
[] (c) release of fatty acids from cream
[] (d) activity of lipase
[] (e) all of the above are true
[] Don't know

Question 8: Of the following tubes, which is a not control?

[] 1. Catalase + H2O2
[] 2. Catalase + H2O
[] 3. H2O + H2O2
[] Don't know

Question 9: Why were the enzymes catalase and amylase placed in a 37o water bath ?

[] a. that is body temperature
[] b. temperature speeds enzyme activity
[] c. both 1 and 2 are true
[] d. none of the above
[] Don't know

Question 10: Which enzyme digested egg albumin into peptides and amino acids best in alkaline conditions?

[] Amylase
[] Catalase
[] Lipase
[] Pepsin
[] Trypsin
[] Don't know
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Prepared by: Dr John Oyston, March 14, 1997.