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.   Phosphatase
B.   Isomerase
C.   Dehydrogenase
D.   Kinase
E.   Hydrolase
F.   Synthase
Question #2
Match the class of enzyme with its function: Removes water to join molecules
A.   Hydrolase
B.   Kinase
C.   Isomerase
D.   Synthase
E.   Dehydrogenase
F.   Phosphatase
Question #3
Match the class of enzyme with its function: Removes hydrogens
A.   Phosphatase
B.   Kinase
C.   Dehydrogenase
D.   Hydrolase
E.   Synthase
F.   Isomerase
Question #4
Match the class of enzyme with its function: Adds phosphate groups
A.   Dehydrogenase
B.   Phosphatase
C.   Kinase
D.   Hydrolase
E.   Synthase
F.   Isomerase
Question #5
Match the class of enzyme with its function: Rearranges the atoms in a molecule
A.   Kinase
B.   Hydrolase
C.   Isomerase
D.   Phosphatase
E.   Dehydrogenase
F.   Synthase
Question #6
Which type of organic compound are enzymes?
A.   Lipids
B.   Steroids
C.   Nucleic acids
D.   Carbohydrates
E.   Proteins
Question #7
The active site is a binding site for which of the following?
A.   Water
B.   Product
C.   Substrate
D.   None of the choices are correct.
E.   Any other enzyme
Question #8
Which of the following correctly represents the mechanism of enzyme function (S = substrate, P = product, E = enzyme)?
A.   E + P -> E - S -> E - P -> E + P
B.   S + P -> E - P -> E + P
C.   E + S -> E - S -> E - P -> E + P
D.   E + P -> E - P -> E - S -> E + S
E.   E + S -> E - P -> E - S -> E + S
Question #9
An enzyme can only bind one substrate at a time.
A.   TRUE
B.   FALSE
Question #10
An enzyme speeds up a chemical reaction in the cell, but can only be used once.
A.   TRUE
B.   FALSE
Question #11
Where is sucrase found in the human body?
A.   On the gastric surface
B.   In the pancreas
C.   In the liver
D.   On the microvilli of the small intestine
Question #12
The function of sucrase is to ________.
A.   join glucose and fructose together to form sucrose
B.   break sucrose into glucose and fructose
C.   break sucrose into hydrogen, oxygen, and carbon atoms
D.   form a disaccharide from a monosaccharide
Question #13
How does sucrose change the configuration of sucrase?
A.   Sucrose binds to its active site on sucrase, changing the shape of sucrase enzyme.
B.   Sucrase binds to its active site on the sucrose molecule, causing it to denature.
C.   Sucrose destroys the sucrase enzyme when they collide randomly in the small intestine.
D.   Sucrose changes the pH in the small intestine, causing sucrase to denature.
Question #14
How often can a sucrase molecule be used to hydrolyze sucrose?
A.   Twice
B.   Once
C.   Never
D.   Many times
Question #15
Elevated levels of acid phosphatase in the blood would indicate ________.
A.   pancreatitis
B.   muscular dystrophy
C.   myocardial infarction
D.   cancer of the prostate
Question #16
Isoenzymes released from damaged tissue include MM, BB, and ________.
A.   pH
B.   LDH
C.   AST
D.   MB
Question #17
What condition does Tom's elevated MB isoform of creatine phosphate suggest ________.
A.   renal disease
B.   heart attack
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.   AST
B.   CK
C.   PSA
D.   CPK
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.   They increase the energy levels in the body and become toxic waste so the body has to remove them in the urine.
C.   Because they are fat-soluble and the body is able to store them, which creates more 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 1st
D.   violates the 2nd
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 2nd
C.   violates the 1st
D.   obeys the 1st
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 2nd
B.   violates the 1st
C.   violates the 2nd
D.   obeys the 1st
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.   FALSE
B.   TRUE

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