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- 1. Plays an important role in intracellular signaling 2. helps maintain an erection in men 3. has a key role in glycoprotein synthesis 4. Helps control diabetes by reducing blood sugar and insulin resistance 5. facilitates absorption of minerals such as Potassium, Magnesium, and Calcium 6. removes toxic substances from the breakdown of muscle proteins during intensive exercise 7. has a synergistic effect with Vitamin E and Selenium 8. Needed to produce tryptophan 9. Protects myelin sheath 10. facilitates removal of heavy metals such as mercury Choices for the answers: A. Alanine B. Cysteine C. Glutamine D. Glutathione E. Glycine F. Serine G. Taurine H. Aspargine I. Aspartic Acid J. Proline K. L-arginine L. Tyrosine14) Which of the following correctly ranks the steps in the secretory pathway? 1. Active PKA subunits phosphorylate targets in the cell, regulating function. 2. The catalytic subunits of PKA dissociate. 3. Gprotein a subunit exchanges bound GDP for GTP. 4. CAMP binds to the regulatory subunits of PKA, activating it. 5. Ga subunit dissociates from complex and activates adenylate cyclase. 6. Ligand (hormone) binds to receptor. 7. Activated adenylate cyclase produces CAMP from ATP.What common features are shared by most cell signaling systems?
- Outline the role of the cytoskeleton in intracellular signal transduction.With the aid of a diagram, explain feedback inhibition and feedback repression.Comparing cells synthesizing secretory proteins and cells secreting steroid hormones, the cells synthesizing the steroid hormones have: A) more rough ER. B) more smooth ER C) equal amounts of smooth and rough ER D) equal amounts of smooth and rough ER, but more lysosomes. E) equal amounts of smooth and rough ER, but fewer lysosomes.
- how does covid19 affect the systems of the body.. for example, nervous system, excretory system, endocrine system?(i) For non-lipid soluble signalling molecules, which class of receptors are required? Please give two examples of non-lipid signalling molecules and explain how these signalling molecules induce intracellular signalling to change the cell behaviour. (ii) Compare and contrast beta catenin and p53 signalling, and explain their functions in the nucleus.What thing can you do to maintain the development and growth of your cell? Statements about Positive regulators?
- 19. Which of the following statements is FALSE? A) Nucleotides and amino acids can act as extracellular signal molecules. B) Some signal molecules can bind directly to intracellular proteins that bind DNA and regulate gene transcription. C) Some signal molecules are transmembrane proteins. D) Answer: Dissolved gases such as nitric oxide (NO) can act as signal molecules, but because they cannot interact with proteins they must act by affecting membrane lipids. Explanation:21. Given the generic signaling pathway in the figure below, find out which label is incorrect. A) 1. Ligand B) 2. Receptor protein C) 3. Transcription factors D) 4. Effector proteins Answer: Explanation: * metabolic enzyme cytoskeletal protein cellular changes 1 2 3 transcriptional regulatorWhat is the purpose of feedback loops in the body?