While writing your lecture notes, you are trying to develop a way to impart to y
ID: 97717 • Letter: W
Question
While writing your lecture notes, you are trying to develop a way to impart to your students how the removal of water molecule, a hydroxyl and a hydrogen atom, will be used in making macromolecules. A molecule is a collection of atoms joint through different types of bonds. A macromolecule is the joining of numerous molecules into something that is relatively quite large. The addition of a molecule to a macromolecule, as well as the removal of a molecule from the macromolecule, involves a molecule of water. From past experience you are aware that you state this to your students many will or added when altering macromolecules. A dehydration synthesis (removal of water) reforms atomic bonds between molecules to create a larger macromolecules. In a dehydration reaction, a hydroxyl group is removed from one reactant molecule while a hydrogen atom is stripped from another reactant molecule. Reactant (with hydroxyl group) + Reactant (with hydrogen ion) + Product + H_2O The open bonds will be reformed joining the two molecules, while the hydroxyl and hydrogen atom will be released as water. The reverse of a dehydration synthesis is a hydrolysis reaction, in which a bond between two molecules is stressed by an enzyme and a hydroxyl group when a hydrogen atom is added into the bond. Whereas a dehydration synthesis creates a macromolecules a hydrolysis reaction breaks one part. Choose from the following statements the one best describes the reactions illustrated in the figure above.Explanation / Answer
The best answer for the given sequence of reactions described in the question is option 1. Using energy, an enzyme removes hydroxyl group from the carboxyl group of one amino acid and a hydrogen atom from the amino group of another amino acid to join the amino acids in a dehydration synthesis reaction that releases water. Alternatively, another enzyme breaks the peptide bond and uses a water molecule to join the hydroxyl group to the carboxyl group of one amino acid and hydrogen atom to the amino group of another amino acid in a hydrolysis reaction.
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