Which of the following statements regarding the urea cycle is INCORRECT? All steps of the urea cycle occur in the cytosol. One of the nitrogen atoms in urea is donated from aspartate. One of the nitrogen atoms in urea is donated from glutamate. Nitrogen can be delivered from the muscle via alanine.
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Sri K.
which statement is true a. During urea cycle, citrulline is produced in cytoplasm, and exits to matrix for further reaction b. During urea cycle, citrulline is produced from aspartate in cytoplasm c. During urea cycle, citrulline is produced in the mitochondrial matrix, and exits to cytoplasm for further reaction d. During urea cycle, citrulline is produced from aspartate in matrix, and exits to cytoplasm
Which of the following is incorrect about pathways activated by G-protein-coupled receptors? a. The extracellular signaling molecule is the first messenger. b. When activated, plasma membrane-bound G protein can switch on an effector. c. Second messengers enter the nucleus. d. ATP converts to cAMP to activate protein kinases. e. Protein kinases phosphorylate molecules to change cellular activity.
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