Identify each reaction from the citric acid cycle as an oxidation‑reduction reaction, an esterification reaction, an amidation reaction, a hydrolysis reaction, a hydration reaction, or a dehydration reaction. 1. Which type of reaction occurs when succinyl-CoA is converted to succinate in the citric acid cycle?
2. Which type of reaction occurs when malate is converted to oxaloacetate in the citric acid cycle?
3. Which type of reaction occurs when aconitate is converted to isocitrate in the citric acid cycle?

1. Oxidation-reduction and hydrolysis

2. Oxidation-reduction

3. Dehydration

Explanation:

Our options for each reaction are:

a) Oxidation‑reduction reaction

b) Esterification reaction

c) Amidation reaction

d) Hydrolysis reaction

c) Hydration reaction

f) Dehydration reaction

In reaction one the have the rupture of the S-CoA bond. This reaction takes place by the addition of a water molecule and the oxidation to a carboxylic acid group. So, for reaction 1 we will have an oxidation-reduction and a hydrolysis reaction.

For reaction 2, the functional group change from alcohol to a carboxylic acid. So, we have an oxidation-reduction reaction.

In the last reaction, we have the production of a double bond by the removal of water. With this in mind, we have a dehydration reaction.

See figure 1

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