Final answer:
Examples of peptide bonds include the linkage between alanine and glycine in a dipeptide. C-H bonds are found in methane, whereas ethane is an example of a molecule with C-C bonds.
Step-by-step explanation:
Peptide bonds, C-H bonds, and C-C bonds are all types of chemical bonds found in organic molecules. A peptide bond is a special type of amide bond that forms when two amino acids are linked together. For instance, the peptide bond that connects the amino acids alanine and glycine can serve as an example. This bond is formed via a dehydration synthesis reaction, where the amino group (-NH2) of one amino acid reacts with the carboxyl group (-COOH) of another, releasing a molecule of water (H2O) and creating a covalent bond between the carbon (C) of one amino acid and the nitrogen (N) of the next. This bond is rigid, which affects the secondary and tertiary structure of proteins.
C-H bonds are single covalent bonds between carbon and hydrogen, common in organic molecules. For example, methane (CH4) is the simplest organic molecule, containing four C-H bonds. C-C bonds are single or multiple covalent bonds between carbon atoms and are found in all organic compounds. A simple example of a molecule with a C-C bond is ethane (C2H6), which has a single bond connecting the two carbon atoms.