A. Lineweaver-Burk plot of the enzyme with increasing amounts of substrate in the absence or the presence of the inhibitor is shown below. Graph A : x-intercept = - 0.007, y-intercept = 0.8 Graph B : x-intercept = - 0.012, y-intercept = 0.8 Graph C : x-intercept = - 0.027, y-intercept = 0.8 Graph D : x-intercept = - 0.039, y-intercept = 0.8 Graph A 4 Graph B Graph C Graph D -0,04 -0,02 0,00 0,02 0,04 1/[Substrate] (uM) (i) Which graph indicates an enzymatic reaction without inhibitor? (ii) Which type of inhibitor is it? Briefly explain. (iii) Which graph indicates the highest concentration of inhibitor? 1/Rate (umol/min)
Enzyme kinetics
In biochemistry, enzymes are proteins that act as biological catalysts. Catalysis is the addition of a catalyst to a chemical reaction to speed up the pace of the reaction. Catalysis can be categorized as either homogeneous or heterogeneous, depending on whether the catalysts are distributed in the same phase as that of the reactants. Enzymes are an essential part of the cell because, without them, many organic processes would slow down and thus will affect the processes that are important for cell survival and sustenance.
Regulation of Enzymes
A substance that acts as a catalyst to regulate the reaction rate in the living organism's metabolic pathways without itself getting altered is an enzyme. Most of the biological reactions and metabolic pathways in the living systems are carried out by enzymes. They are specific for their works and work in particular conditions. It maintains the best possible rate of reaction in the most stable state. The enzymes have distinct properties as they can proceed with the reaction in any direction, their particular binding sites, pH specificity, temperature specificity required in very few amounts.
![A. Lineweaver-Burk plot of the enzyme with increasing amounts of substrate in the absence
or the presence of the inhibitor is shown below.
Graph A : x-intercept
Graph B : x-intercept = - 0.012, y-intercept = 0.8
Graph C : x-intercept = - 0.027, y-intercept = 0.8
Graph D : x-intercept = - 0.039, y-intercept = 0.8
- 0.007, y-intercept = 0.8
Graph A
4
Graph B
Graph C
Graph D
1
-0,04
-0,02
0,00
0,02
0,04
1/[Substrate] (uM)
(i) Which graph indicates an enzymatic reaction without inhibitor?
(ii) Which type of inhibitor is it? Briefly explain.
(iii) Which graph indicates the highest concentration of inhibitor?
(iv) Calculate the Vmax and Km of the graph showing an enzymatic reaction with the lowest
concentration of inhibitor. Show the steps of calculation and unit in your answers.
Keep 2 decimal places in your answers.
1/Rate (umol/min)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc2119b75-3ba1-4912-92ac-d29afab47a20%2Ff9fdc0f5-497c-4edb-b40d-f5bc1276ac45%2F0f96d99_processed.jpeg&w=3840&q=75)
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