Question 1

Ouabain, an effective inhibitor of Na+, K+-ATPase, exhibits all of the following characteristics EXCEPT:

Accepted Answer

A)  It has a basic steroid structure. 
B)  It contains an unsaturated lactone ring at C-17. 
C)  It binds on the extracellular surface of Na+, K+-ATPase. 
D)  It binds tightly to the enzyme/ATP complex in producing the inhibition. 
E)  It is a cardiac glycoside. 
A)  It has a basic steroid structure. 
B)  It contains an unsaturated lactone ring at C-17. 
C)  It binds on the extracellular surface of Na+, K+-ATPase. 
D)  It binds tightly to the enzyme/ATP complex in producing the inhibition. 
E)  It is a cardiac glycoside.

Question 2

Which of the following is a commonly used mechanism for anchoring a protein to a membrane?

Accepted Answer

A)  attaching a fatty acid to a serine residue to form an ester 
B)  attaching a fatty acid to a methionine residue to form a thioester 
C)  attaching a farnesyl group to a cysteine residue to form a thioether 
D)  attaching a fatty acid to a glutamine residue to form an amide 
E)  none of the above 
A)  attaching a fatty acid to a serine residue to form an ester 
B)  attaching a fatty acid to a methionine residue to form a thioester 
C)  attaching a farnesyl group to a cysteine residue to form a thioether 
D)  attaching a fatty acid to a glutamine residue to form an amide 
E)  none of the above

Question 3

The porin proteins (e.g., maltoporin) utilize the ____ structural motif.

Accepted Answer

A)  single transmembrane α-helix 
B)  multiple transmembrane α-helixes 
C)  single β-sheet 
D)  multiple β-sheet 
E)  none of the above 
A)  single transmembrane α-helix 
B)  multiple transmembrane α-helixes 
C)  single β-sheet 
D)  multiple β-sheet 
E)  none of the above

Question 4

Which of the following would be the most likely interaction between a peripheral membrane protein that contained a high lysine content and a membrane?

Accepted Answer

A)  ionic interaction 
B)  hydrophobic interaction 
C)  hydrogen bonding 
D)  covalent bonding 
E)  both a and c 
A)  ionic interaction 
B)  hydrophobic interaction 
C)  hydrogen bonding 
D)  covalent bonding 
E)  both a and c

Ouabain, an effective inhibitor of Na⁺, K⁺-ATPase, exhibits all of the following characteristics EXCEPT:

Which of the following is a commonly used mechanism for anchoring a protein to a membrane?

The porin proteins (e.g., maltoporin) utilize the ____ structural motif.

Which of the following would be the most likely interaction between a peripheral membrane protein that contained a high lysine content and a membrane?

The Facts of Life: Chemistry Is the Logic of Biological Phenomena

Water: the Medium of Life

Thermodynamics of Biological Systems

Amino Acids and the Peptide Bond

Proteins: Their Primary Structure and Biological Functions

Proteins: Secondary, Tertiary, and Quaternary Structure

Carbohydrates and the Glycoconjugates of Cell Surfaces

Lipids

Nucleotides and Nucleic Acids

Structure of Nucleic Acids

Recombinant Dna, Cloning, Chimeric Genes, and Synthetic Biology

Enzymeskinetics and Specificity

Mechanisms of Enzyme Action

Enzyme Regulation

Molecular Motors

Metabolism: an Overview

Glycolysis

The Tricarboxylic Acid Cycle

Electron Transport and Oxidative Phosphorylation

Photosynthesis

Gluconeogenesis, Glycogen Metabolism, and the Pentose Phosphate Pathway

Fatty Acid Catabolism

Lipid Biosynthesis

Nitrogen Acquisition and Amino Acid Metabolism

Synthesis and Degradation of Nucleotides

Metabolic Integration and Organ Specialization

Dna Metabolism: Replication, Recombination, and Repair

Transcription and the Regulation of Gene Expression

Protein Synthesis

Completing the Protein Life Cycle: Folding, Processing, and Degradation

The Reception and Transmission of Extracellular Information

Filters

Exam 9: Membranes and Membrane Transport

Ouabain, an effective inhibitor of Na+, K+-ATPase, exhibits all of the following characteristics EXCEPT:

Which of the following is a commonly used mechanism for anchoring a protein to a membrane?

The porin proteins (e.g., maltoporin) utilize the ____ structural motif.

Which of the following would be the most likely interaction between a peripheral membrane protein that contained a high lysine content and a membrane?

The Facts of Life: Chemistry Is the Logic of Biological Phenomena

Water: the Medium of Life

Thermodynamics of Biological Systems

Amino Acids and the Peptide Bond

Proteins: Their Primary Structure and Biological Functions

Proteins: Secondary, Tertiary, and Quaternary Structure

Carbohydrates and the Glycoconjugates of Cell Surfaces

Lipids

Nucleotides and Nucleic Acids

Structure of Nucleic Acids

Recombinant Dna, Cloning, Chimeric Genes, and Synthetic Biology

Enzymeskinetics and Specificity

Mechanisms of Enzyme Action

Enzyme Regulation

Molecular Motors

Metabolism: an Overview

Glycolysis

The Tricarboxylic Acid Cycle

Electron Transport and Oxidative Phosphorylation

Photosynthesis

Gluconeogenesis, Glycogen Metabolism, and the Pentose Phosphate Pathway

Fatty Acid Catabolism

Lipid Biosynthesis

Nitrogen Acquisition and Amino Acid Metabolism

Synthesis and Degradation of Nucleotides

Metabolic Integration and Organ Specialization

Dna Metabolism: Replication, Recombination, and Repair

Transcription and the Regulation of Gene Expression

Protein Synthesis

Completing the Protein Life Cycle: Folding, Processing, and Degradation

The Reception and Transmission of Extracellular Information

Filters

Ouabain, an effective inhibitor of Na⁺, K⁺-ATPase, exhibits all of the following characteristics EXCEPT: