8 3. Give the specific enzyme class and first two digits of the enzyme's EC number for each enzyme-catalyzed reactionbelow. For hydrolases and ligases, give only the first digit.1)ATPAMP PP,NH,NH₂NH₂ATP + NH3ADP + H₂N-PO3²SO₂ + O₂ + H₂OSO₁² + H₂O₂2)3)5)OH-FADOHOPO,OHOHOHFADH,O=CO+

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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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1.1)the following data duscribe an enzyme-catalyzed reaction(hydrolysis of cabobenzoxyglycyl-L-tryptophan) Plot these results using a lineweaver-Burk method, and determine values for Km and Vmax. substrate concenrate(mM) Velocity(mM.sec-1) 2,5 0.024 5 0.036 10 0.053 15 0.060 20 0.061 25 0.062 1.2) If the Km of an enzyme for it's substrate remains constant as the concentration of the inhibitor icreaces, what can be said about the mode of inhibition and why? 1.3) calculate the turnover number for an enzyme, assuming Vmax is 0.5M.sec-1 and the concentration of the enzyme used is 0.002M . why is it usefull to know this? 1.4) discuss the mechanism of the bohr effect that occurs during the interactions of Hb with oxygen under physiological conditions in the lungs and tissues. make use of relavant graphs and diagrams to explain your answer.
there are A-D questions to this picture set up. A) What enzyme catalyzes this reaction? B) What is Delta G, please answer in Joules, K=19 C) If concentration of Glucose-1_Phosphate is 48.82 uM at equalibrium, what is the concentration of Glucose-6-phosphate in uM? D) If the reaction is NOT at equalibrium, what is delta G at 25C if the concentration of Glucose-1-phosphate is 15.04 uM and concentration of Glucose -6-phosphate is 1.62 mM? please answer in Joules and in significant figures. *note, 10^3uM in 1 mM Thank you!!
The enzyme, fumarate, has the following kinetic constants: k 1 k 2 k -1 where k 1 = 10 9 M -1 s -1 k -1 =4.4 x 10 4 s -1 k 2 = 10 3 s -1 a. What is the value of the Michaelis constant for this enzyme? b. At an enzyme concentration of 10 -6 M, what will be the initial rate of product"
1.The class of enzyme that catalyzes addition of a group to a double bond is? oxidoreductases lyases ligases isomerases hydrolases transferases 2. Suppose an enzyme and its substrate obey the lock and key model of enzyme catalysis. Which of the following would be true of the enzyme? the active site of the enzyme must be rigid the active site of the enzyme must be flexible only one substrate could be converted to product by the enzyme the enzyme could bind different substrates if the substrates shared a common motif somewhere in their structures the entire enzyme must be rigid 3. Which of the following enzymes is found in blood serum and is diagnostic of prostate cancer if enzyme levels are elevated? alanine aminotransferase phosphohexose isomerase lactate dehydrogenase acid phosphatase alkaline phosphatase 4. A blood test returns elevated aspartate aminotransferase levels. You suspect that the patient has suffered a heart attack. What other serum enzyme level of…
1. What are the effects of pH and temperature to catalase? What is the optimum pH and optimum temperature for catalase? 2. Explain why the rate of reaction initially increases with increase in temperature then gradually declines as the temperature is further increased. 3. Is the rate of enzymatic reaction always directly dependent on enzyme concentration? Explain. 4. Explain the effect of substrate concentration on enzyme activity. 5. What is the effect of CuSO, on the enzymatic activity of catalase? 6. Is CuSO4 an activator or inhibitor? If it is an inhibitor, what kind of inhibitor is it?
when saturated with substrate, an enzyme has a maximum initial rate of 110mumoles of substrate converted to product per second. At a substrate concentration of 100mu M, the same enzyme converts substrate to product at a rate of 0.010mmoles/ sec. Assuming that Michaelis - Menten kinetics are followed, calculate the reaction rate when substrate concentration is 2x10^-3M.
During chymotrypsin-mediated catalysis, which of the following statements is true? Select any/all answers that apply. A. A basic (positively-charged) side chain of the substrate polypeptide sits within the oxyanion hole of the enzyme. B. A basic (positively-charged) side chain of the substrate polypeptide sits within the specificity pocket of the enzyme. C. Ser195 hydrogen-bonds with the backbone carbonyl group of the substrate polypeptide within the oxyanion hole of the enzyme. D. All three residues that comprise the catalytic triad of the enzyme interact directly with the substrate polypeptide chain. E. Both covalent catalysis and acid-base catalysis occur.
The protein catalase is an enzyme that catalyzes the decomposition of hydrogen peroxide:2 H2O2 (aq) → 2 H2O (l) + O2 (g)and has a Michaelis-Menten constant of 25 × 10-3 mol·dm-3 and a turnover number of 4.0×107s-1.The total enzyme concentration is 0.016×10-6 mol·dm-3 and the initial substrate concentration is4.32×10-6 mol·dm-3 Calculate the maximum reaction rate (????) for this enzyme, and the initial rateof this reaction. Note that catalase has a single active site.
When enzyme solutions are heated, there is a progressive loss of catalytic activity over time due to denaturation of the enzyme. A solution of the enzyme hexokinase incubated at 450C lost 50% of its activity in 12 minutes, but when incubated at 450C in the presence of a very large concentration of one of its substrates, it lost only 3% of its activity in 12 minutes. Suggest why thermal denaturation of hexokinase was retarded in the presence of one substrates
Several names are compatible with standard nomenclature for the enzyme that catalyzes the reaction shown in the figure. However, the assigned name is based specifically based on its substrate and its coenzyme. What is that name?
1. What do some enzymes require for catalytic activity? What is a catalytically active complete enzyme called, along with its cofactor?2. Classify the enzymes. What class of enzymes are lactate dehydrogenase and alpha-amylase?3. What is the function of an enzyme as a catalyst? Where does an enzyme-catalyzed reaction occur?4. What is the most used enzyme activity unit? What is understood when one unit of enzyme activity is mentioned?5. What are the factors affecting the rate of an enzymatic reaction?6. What are the reasons why the rate of a reaction catalyzed by an enzyme decreases over time?7.Describe the relationship between ACE2 (Angiotensin converting enzyme 2) and the COVID-19 outbreak using bioinformatics tools.
Lineweaver-Burk plots of enzyme kinetics for the reaction, S <-> P, has the following features: 1/v is zero when 1/[S] equals -40 liter mole^-1; 1/[S] is zero when 1/v equals 2.0 x 10^5 min mole^-1. What are the Vmax and Km? Vmax = 5 umol min^-1, Km = 2.5 mM? Vmax = 5 mmol min^-1, Km = 25 M? Vmax = 5 umol min^-1, Km = 25 mM? Vmax = 5 mol min^-1, Km = 2.5 mM? Vmax = 5 mol min^-1, Km = 25 mM?

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3. Give the specific enzyme class and first two digits of the enzyme's EC number for each enzyme-catalyzed reaction below. For hydrolases and ligases, give only the first digit. 1) ATP AMP+PP, NH₂" NH₂, ADP+ H₂N-PO,²¹ SO² + H₂O₂ 2) 3) ATP + NH3 SO₂ + O₂ + H₂O NH, =