Table of contents

1. Overview of Cell Biology2h 49m
2. Chemical Components of Cells1h 14m
3. Energy1h 33m
4. DNA, Chromosomes, and Genomes2h 31m
5. DNA to RNA to Protein2h 31m
6. Proteins1h 36m
7. Gene Expression1h 42m
8. Membrane Structure1h 4m
- The Lipid Bilayer
  38m
- Membrane Proteins
  25m
9. Transport Across Membranes1h 52m
10. Anerobic Respiration1h 5m
11. Aerobic Respiration1h 11m
12. Photosynthesis52m
13. Intracellular Protein Transport2h 18m
14. Cell Signaling1h 28m
15. Cytoskeleton and Cell Movement1h 39m
16. Cell Division3h 5m
17. Meiosis and Sexual Reproduction50m
18. Cell Junctions and Tissues48m
19. Stem Cells13m
- Stem Cells
  13m
20. Cancer44m
21. The Immune System1h 6m
22. Techniques in Cell Biology1h 41m

14. Cell Signaling

Overview of Cell Surface Receptors

Cell Biology

14. Cell Signaling

Overview of Cell Surface Receptors

Previous problemNext problem

Struggling with Cell Biology?

Join thousands of students who trust us to help them ace their exams!Watch the first video

Multiple Choice

G-protein-linked receptors , whereas receptor tyrosine kinases .

are only found in prokaryotes; are only found in plant cells

activate intracellular signaling pathways via G proteins; phosphorylate themselves and other proteins on tyrosine residues

require ATP for activation; do not require any energy input

directly bind DNA to regulate gene expression; function only as ion channels

Previous problemNext problem

Verified step by step guidance

Understand the two types of receptors mentioned in the problem: G-protein-linked receptors and receptor tyrosine kinases. These are both types of cell surface receptors involved in signal transduction, but they function differently.

Recall that G-protein-linked receptors (also called G-protein-coupled receptors or GPCRs) activate intracellular signaling pathways by interacting with G proteins. When a ligand binds to the GPCR, it causes a conformational change that activates the associated G protein, which then transmits the signal inside the cell.

Receptor tyrosine kinases (RTKs), on the other hand, are enzymes that phosphorylate themselves and other proteins on tyrosine residues. When a ligand binds to an RTK, it typically causes dimerization of the receptor, activating its kinase domain, which then transfers phosphate groups from ATP to tyrosine residues on itself and other target proteins.

Eliminate incorrect answer choices by analyzing the functions of these receptors. For example, GPCRs do not directly bind DNA, and RTKs do not function as ion channels. Similarly, GPCRs are not exclusive to prokaryotes, and RTKs are not exclusive to plant cells.

Select the correct answer: 'activate intracellular signaling pathways via G proteins; phosphorylate themselves and other proteins on tyrosine residues,' as this accurately describes the mechanisms of GPCRs and RTKs.