Multiple Choice
Which of the following best describes the primary function of cell surface receptors?
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14. Cell Signaling
Overview of Cell Surface Receptors
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Which of the following is a function of glycoproteins on the cell surface?
A
Producing ATP through cellular respiration
B
Facilitating cell-cell recognition
C
Synthesizing DNA during replication
D
Degrading misfolded proteins in the lysosome
Verified step by step guidance1
Understand the role of glycoproteins: Glycoproteins are proteins that have carbohydrate groups attached to them. These molecules are commonly found on the surface of cells and play a critical role in various cellular processes.
Eliminate irrelevant options: Glycoproteins are not directly involved in producing ATP through cellular respiration. ATP production occurs in the mitochondria, primarily through processes like glycolysis, the citric acid cycle, and oxidative phosphorylation.
Eliminate another incorrect option: Glycoproteins are not responsible for synthesizing DNA during replication. DNA synthesis is carried out by enzymes like DNA polymerase during the S phase of the cell cycle.
Eliminate the third incorrect option: Glycoproteins do not degrade misfolded proteins in the lysosome. Misfolded proteins are typically targeted for degradation by the proteasome or autophagy pathways, not glycoproteins.
Identify the correct function: Glycoproteins on the cell surface are involved in facilitating cell-cell recognition. This is crucial for processes like immune response, tissue formation, and communication between cells.
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