MCAT Chem/Phys questions n answers /passed

MCAT Chem/PhysGenerally, how are proteins formed? The connecting of a string of amino acids via peptide bonds and the folding of this string to create a completed protein. The folding is determined primarily by the hydrophilic and/or hydrophobic nature of the amino acids. Stabilized by hydrogen bonds, disulfide bridges, and other intramolecular forces. Peptide (Amide) Bonds These are formed when the n-terminus of one amino acid attacks the carboxy terminus of another amino acid. Water is given off making this a condensation, or dehydration, reaction. Stable under physiological conditions due to resonance, planar molecular geometry, and partial double bond character. Brainpower Read More Hydrolysis The breaking of peptide bonds. In Organic Chemistry you can use an acid or base catalyst. Living organisms use hydrolytic enzymes. Primary Structure of a Protein The linear arrangement of amino acids. Stabilized by covalent peptide bonds. Secondary Structure of a Protein