ex_02_sp06

ex_02_sp06 - Multiple-Choice, 3 points each, 60 points...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Multiple-Choice, 3 points each, 60 points total For each of the following questions, encircle the letter corresponding to the BEST response. 1. Which of the following is NOT an assumption made in the derivation of the Michaselis-Menten equation? A. Only one substrate is considered. . B. The rate of formation of ES is balanced by the rate of its destruction, either to E + S or to P + E. . C. The reaction is at equilibrium. D. The k -2 step can be ignored. E. (All of the above are assumptions usually made.). 2. Which of the following correctly defines K M ? A. It is equal to the quantity k 1 /(k -1 + k 2 ) B. It is the dissociation constant for the enzyme-substrate complex. C. It is equal to V max /2. D. It is the substrate concentration giving half-maximal velocity. E. It is equal to the quantity k -1 /(k 1 + k 2 ) 3. Serine residues occupy the active site of trypsin, chymotrypsin, acetylcholinesterase, and many other enzymes. What property of Ser is associated with its catalytic role in those enzymes? A. It has a sidechain group capable of hydrogen bond formation. B. It readily forms amides. C. Its functional group may be acylated. D. It is found near the surface of these enzymes. E. It may form acid anhydrides. 4. Which statement about a hemoglobin molecule is INCORRECT? A. There are four polypeptide chains non-covalently associated. B. Each polypeptide chain is associated with one porphyrin ring. C. There are a total of four Fe 2+ atoms in oxyhemoglobin. D. One BPG can bind in a central cavity. E. HbF contains ± and ² chains.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 5. Which of the following statements about the X-ray structure of myoglobin is INCORRECT? A. There are eight regions of ± helix. B. The regions between the helices frequently contain Pro or ² turns. C.
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 9

ex_02_sp06 - Multiple-Choice, 3 points each, 60 points...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online