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

Protein Kinase Receptors

Cell Biology

14. Cell Signaling

Protein Kinase Receptors

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Multiple Choice

Which of the following is not a common example of protein kinase signaling cascades?

TGFβ

Inositol Phospholipid pathway

MAP Kinase pathway

GTP signaling

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Verified step by step guidance

Understand the role of protein kinase signaling cascades: Protein kinases are enzymes that modify other proteins by chemically adding phosphate groups to them (phosphorylation). This process is crucial in regulating various cellular activities, including cell growth, division, and apoptosis.

Identify the common protein kinase signaling pathways: Some well-known protein kinase pathways include the MAP Kinase pathway, which is involved in cell growth and differentiation, and the TGFβ pathway, which plays a role in cell growth and development.

Examine the Inositol Phospholipid pathway: This pathway involves the generation of second messengers like IP3 and DAG, which are crucial for various cellular processes. It is often associated with signaling cascades that involve protein kinases.

Consider the role of GTP signaling: GTP signaling typically involves G-proteins, which are not protein kinases. G-proteins act as molecular switches in various signaling pathways, but they do not directly phosphorylate proteins.

Determine which option does not fit: Since GTP signaling does not involve protein kinases directly, it is not a common example of a protein kinase signaling cascade, unlike the other pathways listed.