Wgu Biochemistry Task 4 Essay

958 Words Feb 21st, 2016 4 Pages
Biochemistry Task 4

1. Describe two important features that make all enzymes catalysts .
A catalyst is a substance which can accelerate the rate of a chemical reaction without going through a chemical change itself. Enzymes are proteins which help accelerate the rate of reactions. Enzymes also lower activation energy without being used. (Hudon­Miller 2012) After and enzyme and substrate bind it converts the substrate to it’s specific product. The enzyme remains unchanged and it is free to move on to other products as the enzyme itself does not undergo a chemical change during this process. 2. Create an original diagram, or series of diagrams,
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The lack of the enzyme to break down F­1­P causes it to accumulate in the liver, kidneys and small intestines. When F­1­P is not broken down it inhibits glycogen breakdown and glucose synthesis, thereby causing severe hypoglycemia following ingestion of fructose. (Food­info 2014) B.
1. Explain what would hypothetically happen to the amount of ATP available to a cell if the entire Cori cycle were to occur and remain within a single cell (e.g., a muscle cell).
If it were to occur in a single cell the it would operate at a net loss of 4 ATP. The conversion of lactate requires 6 ATP and only 2 are produced in the muscle cell from the breakdown of glucose. Without the liver to help convert the lactate aerobically the muscle cells glycogen stores would eventually become depleted and a large amount of lactate would build up into the cell. Eventually the muscle cell wouldn’t be able to contract or work as it would lack the energy required.
a. Identify specific numbers of ATP generated and used in the different parts of the cycle, in conjunction with your response from part B1.
The muscle cell breaks down glucose and receives 2 ATP. The ATP is used for contractions and produces lactate which is secreted into the blood. The liver uses 6 ATP to convert lactate into glucose to help replenish glycogen stores in the muscle.

2. Create an original dynamic diagram that shows how the citric acid cycle (CAC) is central to aerobic