Covalent bonding is important between atoms of biological molecules, but other factors are important for self-assembly. For example, hydrogen bonds between base-pairs in DNA hold the two strands together. Complete the sentences describing the general principles regarding how groups or molecules interact. Match the words in the left column to the appropriate blanks in the sentences on the right.
1. When deciding which side of a biomolecule would orient itself toward the water in cytoplasm, the groups would be directed toward the water.
a. molecules.
b. polar
nonpolar
2. When deciding which biomolecules would interact with a hydrocarbon chain, the portions of a biomolecule would orient themselves toward the c.
c. chain
d. carbon
repelled by
3. Polar groups in biomolecules are often characterized by functional groups containing elements such
e. attracted to
f. nitrogen
4. Nonpolar groups in biomolecules are often characterized by functional groups containing the element
5. When looking at ionizable groups, two ions of the same charge, such as two cations, are each other while two ions of the opposite charge, such as one cation and one anion each other.