Physiology 001 - Introduction to Human Physiology » Fall 2021 » Enzymes and Energy

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Question #1
Match the class of enzyme with its function:Removes phosphate groups
A.   Kinase
B.   Isomerase
C.   Hydrolase
D.   Dehydrogenase
E.   Synthase
F.   Phosphatase
Question #2
Match the class of enzyme with its function: Removes water to join molecules
A.   Isomerase
B.   Synthase
C.   Hydrolase
D.   Kinase
E.   Dehydrogenase
F.   Phosphatase
Question #3
Match the class of enzyme with its function: Removes hydrogens
A.   Kinase
B.   Phosphatase
C.   Isomerase
D.   Dehydrogenase
E.   Hydrolase
F.   Synthase
Question #4
Match the class of enzyme with its function: Adds phosphate groups
A.   Dehydrogenase
B.   Isomerase
C.   Phosphatase
D.   Hydrolase
E.   Kinase
F.   Synthase
Question #5
Match the class of enzyme with its function: Rearranges the atoms in a molecule
A.   Kinase
B.   Hydrolase
C.   Dehydrogenase
D.   Phosphatase
E.   Isomerase
F.   Synthase
Question #6
Which type of organic compound are enzymes?
A.   Proteins
B.   Nucleic acids
C.   Lipids
D.   Steroids
E.   Carbohydrates
Question #7
The active site is a binding site for which of the following?
A.   Any other enzyme
B.   Product
C.   Water
D.   Substrate
E.   None of the choices are correct.
Question #8
Which of the following correctly represents the mechanism of enzyme function (S = substrate, P = product, E = enzyme)?
A.   E + S -> E - S -> E - P -> E + P
B.   S + P -> E - P -> E + P
C.   E + S -> E - P -> E - S -> E + S
D.   E + P -> E - P -> E - S -> E + S
E.   E + P -> E - S -> E - P -> E + P
Question #9
An enzyme can only bind one substrate at a time.
A.   FALSE
B.   TRUE
Question #10
An enzyme speeds up a chemical reaction in the cell, but can only be used once.
A.   FALSE
B.   TRUE
Question #11
Where is sucrase found in the human body?
A.   In the liver
B.   On the gastric surface
C.   In the pancreas
D.   On the microvilli of the small intestine
Question #12
The function of sucrase is to ________.
A.   break sucrose into hydrogen, oxygen, and carbon atoms
B.   break sucrose into glucose and fructose
C.   join glucose and fructose together to form sucrose
D.   form a disaccharide from a monosaccharide
Question #13
How does sucrose change the configuration of sucrase?
A.   Sucrose changes the pH in the small intestine, causing sucrase to denature.
B.   Sucrase binds to its active site on the sucrose molecule, causing it to denature.
C.   Sucrose binds to its active site on sucrase, changing the shape of sucrase enzyme.
D.   Sucrose destroys the sucrase enzyme when they collide randomly in the small intestine.
Question #14
How often can a sucrase molecule be used to hydrolyze sucrose?
A.   Once
B.   Twice
C.   Many times
D.   Never
Question #15
Elevated levels of acid phosphatase in the blood would indicate ________.
A.   cancer of the prostate
B.   pancreatitis
C.   muscular dystrophy
D.   myocardial infarction
Question #16
Isoenzymes released from damaged tissue include MM, BB, and ________.
A.   MB
B.   LDH
C.   pH
D.   AST
Question #17
What condition does Tom's elevated MB isoform of creatine phosphate suggest ________.
A.   heart attack
B.   renal disease
C.   jaundice
Question #18
Prostate cancer can lead to difficult with urination due to ________.
A.   enlarged prostate, which compresses the urethra
B.   decreased pH, which causes difficulty with urine release
Question #19
What additional test can be done for prostate cancer ________.
A.   CK
B.   PSA
C.   CPK
D.   AST
Question #20
Coenzymes NAD and FAD are found in the vitamins niacin and riboflavin. Why is it that excess amounts of these vitamins are removed from the body in the urine?
A.   They speed up the metabolic reactions in the body therefore creating more urine.
B.   Because they are fat-soluble and the body is able to store them, which creates more urine.
C.   They increase the energy levels in the body and become toxic waste so the body has to remove them in the urine.
D.   They are water-soluble vitamins and therefore not stored in the body.
Question #21
Complete the sentences that describe how reactions follow, or do not follow, the lays of thermodynamics. Yeast breaking down starch into usable energy _______________ law of thermodynamics.
A.   obeys the 1st
B.   obeys the 2nd
C.   violates the 2nd
D.   violates the 1st
Question #22
Complete the sentences that describe how reactions follow, or do not follow, the lays of thermodynamics. Yeast converting 100 kcal of starch into 100 kcal of fat _______________ law of thermodynamics.
A.   violates the 2nd
B.   obeys the 1st
C.   violates the 1st
D.   obeys the 2nd
Question #23
Complete the sentences that describe how reactions follow, or do not follow, the lays of thermodynamics. Yeast destroying energy when they break down fat _____________law of thermodynamics.
A.   obeys the 1st
B.   obeys the 2nd
C.   violates the 1st
D.   violates the 2nd
Question #24
Lingual lipase is an enzyme with a pH optimum near 5. The pH optimum of an enzyme usually reflects the pH of the body fluid in which the enzyme is found. Thus, this enzyme’s pH optimum is lower most enzymes in the body.
A.   TRUE
B.   FALSE

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