17, Select the false statement: A) In all enzyme reaction mechanisms, enzyme-sub

Question

17, Select the false statement: A) In all enzyme reaction mechanisms, enzyme-substrate interactions never result in formation of covalent bonds 8) Amino acids that come from widely different areas within the primary structure of an enzyme often form the active site C) If K or R was substituted for one or more of the several acidic amino acids found in the active site of lysozyme, the activity of the enzyme would be impaired D) Hexokinase can utilize several different hexose sugars as substrates and also changes conformation following hexose binding (shows induced fit) 18. Which of the following statements regarding tight junctions is false? A) An extracellular tracer molecule cannot be transported across the junction B) Mutations stopping the formation of tight junctions would stop the occlusion of molecules C) Tight junctions can form sealing strands between two cell membranes D) Glucose added to the apical side of intestinal epithelial cannot be transported to the basolateral side at all. 19. Which of the following statements regarding tissue integrity is false? A) The extracellular matrix resists the majority of tension and compression. B) Links between cells via anchoring junctions can help resist most stress. C) In epithelial tissue, tight junctions occupy the most apical position, followed by adherens junctions, and desmosomes D) Epithelial tissue in the small intestine may be connected via cadherins.

Explanation / Answer

17. Answer: A) in all enzyme reaction mechanisms, enzyme substrate interactions never result in formation of covalent bonds.

This statement is false. There are many enzymes that would be participating in covalent catalysis. Some of the enzymes that would be participating in covalent catalysis. An example is chymotrypsin as well as trysin, newsfeed, the nucleophile would be the hydroxyl group that is present in serine, the active site would be forming temporary covalent bonds along with the substrate in their reaction process. Hence, when the statement says that all enzymes do not participate in covalent bonds.

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.