Lehningers Principles of Biochemistry- Chapter 15 Review Questions with Verified Solutions Latest Update 2024
4 views 0 purchase
Course
Lehningers Principles of Biochemistry- Chapter 15
Institution
Lehningers Principles Of Biochemistry- Chapter 15
Lehningers Principles of Biochemistry- Chapter 15 Review Questions with Verified Solutions Latest Update 2024
Glycogen is converted to monosaccharide units by:
A) glucokinase.
B) glucose-6-phosphatase
C) glycogen phosphorylase.
D) glycogen synthase.
E) glycogenase. - Answers C) glycogen ...
Lehningers Principles of Biochemistry- Chapter 15 Review Questions with Verified Solutions Latest
Update 2024
Glycogen is converted to monosaccharide units by:
A) glucokinase.
B) glucose-6-phosphatase
C) glycogen phosphorylase.
D) glycogen synthase.
E) glycogenase. - Answers C) glycogen phosphorylase.
The glycogen-branching enzyme catalyzes:
A) degradation of (α1 → 4) linkages in glycogen
B) formation of (α1 → 4) linkages in glycogen.
C) formation of (α1 → 6) linkages during glycogen synthesis.
D) glycogen degradation in tree branches.
E) removal of unneeded glucose residues at the ends of branches. - Answers C) formation of (α1 → 6)
linkages during glycogen synthesis.
Glycogenin:
A) catalyzes the conversion of starch into glycogen.
B) is the enzyme responsible for forming branches in glycogen.
C) is the gene that encodes glycogen synthase.
D) is the primer on which new glycogen chains are initiated.
E) regulates the synthesis of glycogen. - Answers D) is the primer on which new glycogen chains are
initiated.
Which of the following is true of glycogen synthase?
, A) Activation of the enzyme involves a phosphorylation.
B) It catalyzes addition of glucose residues to the nonreducing end of a glycogen chain by formation
of (α1 → 4) bonds.
C) It uses glucose-6-phosphate as donor of glucose units
D) The conversion of an active to an inactive form of the enzyme is controlled by the concentration
of cAMP.
E) The enzyme has measurable activity only in liver. - Answers B) It catalyzes addition of glucose residues
to the nonreducing end of a glycogen chain by formation
of (α1 → 4) bonds.
Which one of the following statements abour mammalian glycogen synthase is not correct?
A) It is especially predominant in liver and muscle.
B) The donor molecule is a sugar nucleotide.
C) The phosphorylated form of this enzyme is inactive.
D) This enzyme adds glucose units to the nonreducing end of glycogen branches.
E) This enzyme adds the initial glucose unit to a tyrosine residue in glycogenin. - Answers E) This enzyme
adds the initial glucose unit to a tyrosine residue in glycogenin.
The enzyme glycogen phosphorylase:
A) catalyzes a cleavage of β (1 → 4) bonds.
B) catalyzes a hydrolytic cleavage of (α1 → 4) bonds.
C) is a substrate for a kinase.
D) uses glucose 6-phosphate as a substrate.
E) uses glucose as a substrate. - Answers B) catalyzes a hydrolytic cleavage of (α1 → 4) bonds.
Aside from maintaining the integrity of its hereditary material, the most important general metabolic
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller TutorJosh. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $7.99. You're not tied to anything after your purchase.
