ESTION6 a. binds an enzyme\'s active site. O b. can more effectively inhibit an
ID: 274549 • Letter: E
Question
ESTION6 a. binds an enzyme's active site. O b. can more effectively inhibit an enzyme if the concentration of the enzyme's substrate is increased. c. does not bind directly to an enzyme. O d. always irreversibly binds an enzyme through hydrogen bonds. UESTION 7 Which of the following statements regarding a signal transduction pathway or its components is accurate? O a. A G-protein is active when it is bound to GDP O b. The enzyme phosphodiesterase increases the amount of the second messenger cAMP in a cell. O c. A protein kinase adds GTP to other proteins. O d. Small, nonpolar ligands can bind intracellular receptors since they can cross the cell membrane O e. The binding of signaling molecules (ligands) to receptors is covalent and irreversible. QUESTION 8 Where does the citric acid cycle take place in eukaryotic cells? O a. mitochondrial matrix b. mitochondrial outer membrane c. mitochondrial inner membrane d. mitochondrial intermembrane spaceExplanation / Answer
Question 6: a. binds at an enzymes active site
Question 7: d. small, nonpolar polar ligands can bind intracellular receptors since they can cross the cell membrane.
Question 8: a. mitochondrial matrix
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