Which type of phosphorylation does not require a membrane?
A. Substrate-level phosphorylation
B. Oxidative phosphorylation
C. Photophosphorylation
D. All types of phosphorylation require a membrane.
A
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What causes the inactivation of a G protein?
A. The alpha subunit hydrolyzes GTP to GDP and inorganic phosphate. B. The beta and gamma subunits trigger the hydrolysis of GTP to GDP. C. A phosphatase removes the inorganic phosphate group from GTP. D. The inactive receptor catalyzes the replacement of GTP by GDP.
Which of the following is a function of the thymus?
a) production of red blood cells b) secretion of antibodies c) production and maintenance of stem cells d) site for the maturation of lymphocytes
What causes the increase in interstitial osmotic pressure that occurs during edema?
A) increased capillary permeability B) leukocyte migration C) increased blood flow D) stimulation of sensory neurons
Intercalated disks in cardiac muscle
A. are a type of gap junction. B. allow all of the muscle fibers in an area to contract at the same time. C. prevent the cells from pulling apart. D. reduce the electrical resistance between cells allowing APs to pass more easily from cell to cell. E. All of these are correct.