Question 16For a Michaelis Menten reaction the following rate constants were observed:k1 = 7x 107/M-seck1 =1x 103/seck2 = 2 x 104/secThe value of Km is:Select an answer and submit. For keyboard navigation, use the up/down arrow keys to selectan answer.a0.3 Mb0.03 M0.003 Md.0.0003Me0.00003 Mf0.000003 M0.0001 M0.01 Mi0.001M

The correct answer is option, d. 0.0003M.

Answered: For a Michaelis Menten reaction the…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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Question 33 Orciprenaline (C₁₁H₁7NO3, 211.258 g/mol) is a bronchodilator used in the treatment of asthma. The BP assay for orciprenaline tablets is described below. HO The following information was obtained during the assay: Weight of 20 tablets = 2.5564 g Weight of tablet powder assayed = 0.5266 g Absorbance reading - 0.5868 Stated content per tablet = 20 mg A (1%, 1 cm) at 276 nm = 72.3 OH H N OH "Weigh and powder 20 tablets. Shake a quantity of the powder containing 80 mg of orciprenaline sulphate with 50 mL of 0.01 M hydrochloric acid (HCI), filter and add sufficient 0.01 M HCI to the filtrate to produce 100 mL. Dilute 10 mL to 100 mL with 0.01 M HCI and measure the absorbance of the resulting solution at the maximum at 276 nm." Orciprenaline 4 Answer the following questions, explaining your reasoning clearly. a) Calculate the amount of orciprenaline in the tablet powder analyzed. b) Calculate the average amount of orciprenaline per tablet. c) Calculate the percentage of the stated…
QUESTION 36 SDS-PAGE gels are useful in determining the molecular weights of proteins; however, the molecular weights of (one word = adjective) proteins are usually not reliable. %3D
QUESTION 38 In a 250µl reaction containing 0.3 nmol of a Michaelis enzyme with Km = 4.4 x 10 M and saturating substrate concentration, product was formed at an initial velocity of 6.3 x 10 M min-1. What is kcat for this enzyme? Give your answer in 3 sigfigs in scientific notation, for example 1.20 e -3 Click Save and Submit to save and submit. Click Save All Answers to save all answers. O Type here to search 78°F Mostly cloudy End 4) DII PrtScn F8 Home F9 F6 F2 F3 F4 *- & 7 8. 4. #3
QUESTION 58 The following results were obtained from a chromatography experiment on spinach extract. Calculate the rata of miprmo (R ) for chlorophyll A. Chlorophyll A = 13 Chlorophyll B 8 Xanthophyll 20 Carotene =65 Solvent front = 68 O 0.12 O 0.19 1.00 O 0.29 O 0.96 ck Save and Submit to şave and submit. Click Save All Answers to save all answers.
Question 18 The Hemagglutinin protein in Influenza virus contains a remarkably long a- helix (7.95 nm) with 53 residues. How many turns does this helix have? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a 10.0 7.5 19.6 23.2 e 13.9 f 11.7 49.0 14.7 i 9.8 IUnanswered
QUESTION 5 WHAMM is a nucleation promoting factor. Depicted above is a pyrene actin polymerization assay performed with the following reaction conditions 1: Actin + Arp2/3 + WHAMM (active isoform); 2-5: Actin + Arp2/3 + WHAMM (active isoform) and increasing concentrations of Rab1; or 6: actin alone. What effect does Rab1 have on branched actin polymerization? Actin + Arp2/3 + 1.0 500nM WHAMM + 0.2x Rab1(M) + 1.0x Rab1(M) + 2.0x Rab1(M) + 3.0x Rab1(M) Actin alone 0.5 0.0 1000 2000 Time (s) Enhances WHAMM activity inhibits WHAMM activity No effect induces actin bundle formation F-actin (RFU)
QUESTION 10 Name the structure(s) labeled with the X. 400x
QUESTION 58 The following results were obtained from a chromatography experiment on spinach extract. Calculate the rate of migration (R f) for chlorophyll A. Chlorophyll A = 13 Chlorophyll B = 8 Xanthophyll = 20 Carotene = 65 Solvent front = 68 O 0.12 0.19 1.00 0.29 O 0.96 Eck Save and Submit to şave and submit. Click Save All Answers to save all answers.
Question:- The enzyme aromatase is found in the cytoplasm of some cells and converts testosterone to estrogen. You decide to test aromatase from a particular cell, and oops, your lab partner admits he drastically increased the pH in all the test tubes. Which of the following is a likely result? a. The enzyme will be denatured and the substrate will not bind to the active site. b. The enzyme will convert testosterone to estrogen at a faster rate. c. The mistake will have no effect on the experiment, because enzymes are not sensitive to pH. d. The free energy will be lowered and the reaction will not proceed spontaneously.
QUESTION 8 A nucleoside consists of: а. a. Nitrogenous base, phosphate, 5 carbon sugar O b. Nitrogenous base, phosphate С. Nitrogenous base, 5 carbon sugar d. phosphate, 5 carbon sugar
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For a Michaelis Menten reaction the following rate constants were observed: k1 =7x 10/M-sec k1=1x 103/sec k2 =2x 104/sec The value of Km is: