44. Diacylglycerol and calcium activate
a. protein kinase A.
b. protein kinase C.
c. PI 3-kinase.
d. Ca2+/calmodulin-dependent kinase.
Diacylglycerol and calcium activate protein kinase c which is a effector molecule in the GPCR signalling.correct answee is B.
44. Diacylglycerol and calcium activate a. protein kinase A. b. protein kinase C. c. PI 3-kinase....
41. Which of the following statement is/are true about calcium? A. Intracellular calcium levels are about 10X less than extracellular calcium levels. B. Calcium binds to calmodulin, and together they activate a variety of proteins, including myosin light chain kinase. C. Calcium acting in conjuction with diacylglycerol activates protein kinase A D. All of the above are true. E. None of the above is true.
Match the following: 1. G-protein 2. Phospholipase kinase (PLC) 3. Diacylgylceral (DAG) 4. Calmodulin 5. Calcium a. Binds to calcium and activates other proteins b. Stored in the smooth ER and binds to proteins to change their conformation c. Splits PIP2 into IP3 and DAG d. Activity is regulated by GTP and GDP e. Activates protein kinase C and is a part of PIP2
Which process is not a feature of ?-adrenergic receptors? A Phosphorylation B Cause the binding of Ca2+ to calmodulin C activate protein kinase A D Interaction with beta-arrestin
How is calmodulin activated? A. by binding both calcium and potassium B. by binding Ca2+ when the cytosolic concentration is greater than 500 nM C. by binding to a positively charged helix on another protein D. by binding Ca2+ only when calcium channels are open, allowing Ca2+ efflux from the cell E. None of the answers is correct.
Which of the following conditions will activate PDH kinase, which catalyzes the phosphorylation and inactivation of E1 in the PDH complex: a. elevation concentrations of acetyl coa b. elevated concentrations of NAD+ & ADP c. CA2+ d. insulin e. none of the above
Some survival factors activate receptor tyrosine kinases upstream of the PI-3-kinase-Akt pathway. How does this pathway promote cell survival? Akt phosphorylates and inactivates an inhibitor of Tor. Akt phosphorylates and activates the antiapoptotic protein Bcl. Akt phosphorylates and inactivates the pro-apoptotic proteins Bax/Bak. O Akt phosphorylates and inhibits the Bcl2 inhibitor Bad. In most cases, how many mutations are required for a normal cell to turn into a cancer cell? O more than three O generally only one O cancers...
Choose the molecules that can add a phosphate to a protein G-protein IP3 Calcium kinase phosphatase
Protein kinase A phosphorylates _____, which then activates _____. A) phosphorylase kinase; glycogen phosphorylase B) protein phosphatase 1; glycogen synthase C) glycogen phosphorylase; phosphoglucomutase D) adenylate cyclase; phosphorylase kinase
The calcium ion binds to a certain protein to form a 1:1 complex. When 96μM protein and 60μM Ca2+ are mixed together, the concentration of free ligand (calcium) was found to be 31μM. a. Calculate the dissociation constant of the Ca2+−proteinCa2+−protein complex. b. What concentration of Ca2+Ca2+ would you need to dissolve in the solution to ensure that 95% of the protein is bound to calcium? c. What percentage of the calcium ions are bound to the protein in the...
Hormonal activation of insulin levels will: o activate protein kinase A phosphorylation of FBPase2. O phosphorylate PFK2 on a tyrosine residue. O lead to the activation of PFK. O activate the PKC phosphorylation of PFK2. O increase the activation of glucolysis. How many electrons does one turn of the TCA cycle produce? O 3 06 08 O 10 O None of answers are correct Which of the following statements is correct about oxidative pentose phosphate pathway? o It generates NADH...