Action Of A Digestive Enzyme Chapter.55 Test Bank Answers 4e - Laboratory Manual Anatomy & Physiology Cat 4e Test Bank by Terry Martin. DOCX document preview.
Lab Manual for Human Anatomy and Physiology, 4e (Martin)
Chapter 55 Action of a Digestive Enzyme
1) Enzymes can be proteins, lipids, or carbohydrates.
2) When an enzyme catalyzes a chemical reaction, it is consumed in the process, so it cannot be used repeatedly.
3) Which of the following is not true of enzymes?
A) They are considered to be biological catalysts.
B) Enzymes are relatively non-specific, and able to catalyze several chemical reactions in the body.
C) Enzyme activity is temperature-dependent.
D) Denaturation destroys the ability of an enzyme to function.
E) All of these are true of enzymes.
4) The substance that an enzyme acts on in a chemical reaction is called its
A) complex.
B) product.
C) modulator.
D) catalyst.
E) substrate.
5) Denaturation does not alter the primary structure of an enzyme.
6) Which of the following is not true of amylase?
A) It breaks down starch into maltose.
B) It is produced by more than one organ of the digestive system.
C) Its optimum temperature is close to room temperature.
D) The optimum pH for amylase activity is 6.8 - 7.0.
E) All of these are true of amylase.
7) Salivary amylase is deactivated by ________ in the stomach.
A) pepsinogen
B) bile
C) bicarbonate ions
D) lipase
E) hydrochloric acid
8) Pancreatic amylase has the same action as salivary amylase.
9) Which digestive organ produces the enzyme maltase?
A) Small intestine
B) Pancreas
C) Salivary glands
D) Stomach
E) Liver
10) In the amylase activity experiment, the development of a blue-black color upon the addition of iodine-potassium-iodide to the test tube indicates that
A) the starch has been broken down.
B) the starch has been denatured.
C) amylase is functioning at its optimum temperature.
D) the starch has not been broken down.
E) glucose is present in the test tube.
11) All digestive enzymes have the same optimum pH ranges.
12) In the amylase activity experiment, Benedict's solution tests for the presence of
A) triglycerides.
B) amino acids.
C) protein.
D) maltose.
E) starch.
13) Temperatures much higher than the optimum temperature denature enzymes, but colder temperatures do not.
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Laboratory Manual Anatomy & Physiology Cat 4e Test Bank
By Terry Martin