17 Questions
What is the approximate percentage of proteins found in chloroplast membranes?
70%
Which amino acids are typically found in the lipophilic interface of integral proteins?
Trp, His, Tyr
What type of forces are responsible for the interaction between the hydrophobic side chains of integral proteins and fatty acid side chains?
Van der Waals forces
What is the typical structure of integral proteins found in the membrane?
All of the above
Which of the following is an example of an integral protein?
Glycophorin A
What type of bonds are involved in the association of integral proteins with the membrane?
Ionic bonds and hydrogen bonds
What is the primary function of lipid-anchored proteins in the membrane?
To act as receptors for signaling pathways
What is the role of amphipathic alpha helix in the membrane?
To form non-polar core with the membrane
What is the primary function of hydrogen bonds in the membrane?
To hold cells in place and give cells and tissues their structure
What is the primary function of protein domains in the membrane?
To bind with ligands and trigger signaling pathways
What is the primary function of anion exchange proteins in the membrane?
To facilitate transport of anions across the membrane
What is the main function of Band 3 protein in blood plasma?
Exchanging HCO3- with CI- ions
What is the primary function of the SARS-CoV-2 spike protein?
Mediating viral cell entry
What is the characteristic of integral proteins with multiple helices?
They contain 2-12 transmembrane segments
What is the function of the transmembrane domain of the SARS-CoV-2 spike protein?
Anchoring the protein in the viral membrane
What is the name of the process mediated by the Band 3 protein in blood plasma?
Chloride Shift
What is the type of protease that the SARS-CoV-2 spike protein binds to on the host cell membrane?
Type 2 TM serine protease
Test your knowledge of membrane proteins, their composition, and properties. Learn about the differences between integral and peripheral proteins, and explore examples of membrane proteins such as Glycophorin A and Bacteriorhodopsin.
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