Item 34 Lactose intolerance is caused by the lack of the enzyme lactase. This enzyme _________ the cells that make it. Multiple Choice a. is embedded within the membranes of b. is secreted from c. remains within d. None of the choices are correct.
Item 34 Lactose intolerance is caused by the lack of the enzyme lactase. This enzyme _________ the cells that make it. Multiple Choice a. is embedded within the membranes of b. is secreted from c. remains within d. None of the choices are correct.
Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
Section: Chapter Questions
Problem 1P
Related questions
Question
Item 34
Lactose intolerance is caused by the lack of the enzyme lactase. This enzyme _________ the cells that make it.
Multiple Choice
a. is embedded within the membranes of
b. is secreted from
c. remains within
d. None of the choices are correct.
Item35
ItemSkipped
Item 35
Organic cofactors are referred to as _________.
Fill in the blank
Item36
Item
Item 36
Noncompetitive inhibition of an enzyme occurs when the inhibitor binds to the
Multiple Choice
a. allosteric site, and its effectiveness is not influenced by substrate concentration.
b. allosteric site, and its effectiveness depends on substrate concentration.
c. active site, and its effectiveness is not influenced by substrate concentration.
d. active site, and its effectiveness depends on substrate concentration.
e. substrate, and its effectiveness depends on product concentration.
Item37
Item 37
A substance that binds to the active site of an enzyme and turns it off is called a _________ inhibitor.
Fill in the blank
Item 38
Lactase is an enzyme that digests lactose.
True or False
Item 39
Exergonic reactions do not require activation energy.
True or False
Item40
ItemSkipped
Item 40
An enzyme that is described as a protein kinase is a
Multiple Choice
a. hydrolase that removes an amino acid from a protein.
b. transferase that transfers a phosphate group to a protein substrate.
c. ligase that adds an amino acid to a protein.
d.isomerase that changes one protein into another.
d. protease that transfers electrons from one protein to another.
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