Teaching Haryana (HPSC) Assistant Professor Mock Test 2025 Life Sciences Cellular Organization Membrane structure and function
Read the following statement carefully:
"Lipid-linked membrane proteins are attached to the membrane through covalent bonds with lipid molecules. The nature of the lipid anchor can significantly influence the localization, function, and interaction of these proteins with the membrane. There are various types of lipid anchors, including amide-linked myristoyl anchors, thioester-linked fatty acyl anchors, thioether-linked prenyl anchors, and glycosylphosphatidylinositol (GPI) anchors that are linked through an amide bond to phosphatidylinositol."
Based on the statement, which of the following statements is correct?
1
Thioester-linked fatty acyl anchors and thioether-linked prenyl anchors both primarily attach proteins to the membrane's exterior surface.
2
Amide-linked myristoyl anchors attach proteins to the membrane by forming a covalent bond with the nitrogen atom of an amino acid residue in the protein.
3
GPI anchors typically facilitate the attachment of proteins to the cytosolic side of the plasma membrane
4
Thioether-linked prenyl anchors connect proteins to lipids via an ester linkage to the glycerol backbone of phospholipids.
5
Question Not Attempted