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Which of the following is an example of a dehydration reaction? A. A group of enzymes "cut" a mutated protein into smaller molecules, preventing it from harming the cell. B. Amylose, a polysaccharide, is broken down by amylase, an enzyme found in your saliva. C. DNA molecules are replicated in a cell by building new DNA molecules from nucleotides. D. Casein, a type of protein found in milk, is broken down into amino acids by enzymes in the digestive tract.

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Answer:

DNA molecules are replicated in a cell by building new DNA molecules from nucleotides.

The building of new DNA molecules during DNA replication from nucleotides is an example of dehydration reaction. So, the correct option is C.

What is dehydration reaction?

A chemical reaction in which the reaction between the components results in the formation of water as one of the products. The reverse of this is when water, in combination with hydroxyl group splits a compound, its called hydrolysis.

Sulphuric acid, phosphoric acid etc are some of the commonly known dehydrating agents. Dehydration is simply a type of condensation reaction.

When two nucleotides form a phosphodiester bond, it results in the loss of water. Hence, this reaction is an excellent example of dehydration.

Other examples include, alcohol to ether conversation, amiles to nitriles conversation, reaction of sucrose with concentrated sulphuric acid. All of these reactions result in production of water as one of the products.

Therefore, the correct option is C.

Read more about dehydration reactions, here

https://brainly.com/question/11935743

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