Which reactions is catalyzed by carbonic anhydrase in the red blood cell when it reaches the lung?
1. H+ +HCO3->H2CO3
2. H2CO3 ---->H+ + HCO3-
3. H2CO3->CO2+H20
4. CO2 + H20 -> H2CO3
Answer
Option 3) H2CO3
CO2 + H2O
Which reactions is catalyzed by carbonic anhydrase in the red blood cell when it reaches the...
Complete the following sentences describing the reactions of CO2 in plasma. red blood cells carbonic anhydrase low left reversible acidic right cytoplasm basic arrow The concentration of carbon dioxide determines the following reaction: H2O + CO2 + H2CO3 The above reaction is catalyzed by the enzyme carbonic anhydrase found in In the tissues, where CO is high, the reaction will move to the making the blood more making In the lungs where CO2 is low and H2CO3 is high, the...
The enzyme carbonic anhydrase catalyzes the hydration of CO2 gas in red blood cells: CO2 (g) + H2O (L) →H2CO3 (aq) Determine the ∆Ssys of this reaction at 37 °C (body temperature), and justify the sign. *Thermodynamic parameters at T=298K and 1 bar Sm (JK-1 mol-1) Cp (JK-1 MOL-1) CO2 (g) 213.7 36.8 H2O (L) 69.9 78.2 H2CO3 (aq) 187.4 19.4
8. (4 pts) The biological catalyst carbonic anhydrase converts carbon dioxide to carbonic acid, an essential component of the bicarbonate buffer system regulating our blood pH. What mass (in me) of sodium carbonate (NaHCO, MM: 84.006 g/mol) must be added to 500.0 ml of 0.029 M carbonic acid (K. 1 4.3 x 10-7, K., 4.8 x 10-11) to produce a solution with pH = 7.40? Assume no volume change after the addition of sodium carbonate. H2CO3 + H2O=HCO3 + H20...
11. Carbonic anhyd rase of red blood cells, which has a molecular weight of 30,000 is among the most active enzymes known. It catalyzes the reversible hydration of CO2 HCO,+ H H2O+ CO2 If 10 ug of pure carbonic anhyd rase catalyzes maximum hydration of 0.30 g of carbon dioxide in 1 min. at 37°C under optimal conditions, calculate the turnover number of carbonic anhydrase
10. The hydration of CO2 from the atmosphere according to the reaction CO2(g) + H2O(l) HCO3–(aq) + H+(aq) can be catalyzed by the enzyme carbonic anhydrase. Consider how a catalyst works. Will the catalyst affect the rate of both the forward and reverse reactions? Explain your reasoning. 10. The hydration of CO2 from the atmosphere according to the reaction CO2(e) + H20(1) HCO3(aq) + H+(aq) can be catalyzed by the enzyme carbonic anhydrase. Consider how a catalyst works. Will the...
Describe the enzyme carbonic anhydrase by answering the following question: (a) Which reaction is catalyzed by this enzyme? (2 points) (b) Which cofactor is used by this enzyme? (1 point). (c) Which amino acids of the enzyme, and how many of them coordinate the cofactor? (2 points). (d) How does this cofactor help accelerate the reaction? Think about the chemistry (1 point) and the shift of the equilibrium (1 point).
The enzyme carbonic anhydrase catalyzes the reaction CO2(g)+H2O(l)−→−HCO3−(aq)+H+(aq).CO2(g)+H2O(l)→ HCO3−(aq)+H+(aq). In water, without the enzyme, the reaction proceeds with a rate constant of 0.039s−10.039 s−1 at 25°C.25 °C. In the presence of the enzyme in water, the reaction proceeds with a rate constant of 1.0×106s−11.0×106 s−1 at 25°C.25 °C. Assuming the collision factor is the same for both situations, calculate the difference in activation energies for the uncatalyzed versus enzyme- catalyzed reaction.
Carbonic acid H2CO3 is a weak acid that fully dissociates in two steps in the presence of increased concentration of base. Step 1: H2CO3 =HCO3+H* Step 2: HCO3 =20,2- + H+ What is the composition of species in solution at pH = 10.25 when the halfway point to the first equivalence point has been reached? 50 % H2CO3 and 50 % CO2- 50 % CO2- and 50 % HCO3 50 % H2CO3 and 50 % HCO3 100 % H2CO3
21. What are the characteristics of the carbonic acid-bicarbonate buffer system (select all that apply? a CO2 is eliminated by the lungs b. Neutralizes HCl acid to yield carbonic acid and salt c. H2CO3 formed by neutralization dissociates into H2O and CO2 d. Shifts H+ in and out of cell in exchange for other cations such as potassium and sodium e. Free basic radicals dissociate into ammonia and OH-, which combines with Ho to form water 22. What are characteristics...
2. (15 pts) Carbonic anhydrase catalyzes the interconversion between carbon dioxide, water and the dissociated ions of carbonic acid. The following are the initial rate data for this reaction which were obtained in a 1-mL solution that contained 0.0025 gram of carbonic anhydrase (mw -29,100 Da): CO2] (mM) Vo (mM/min) 0.88 1.55 4 2.47 16 3.54 32 4.50 5.21 64 (a) Plot these data in a Lineweaver-Burke plot. Label both axes including proper units. (b) Determine KM, Vmax and the...