Introduces chemical principles and applies them to environmental issues. Covers the fundamental principles, concepts, and language of general, organic, inorganic, and biochemistry. Addresses topics associated with matter/energy, nuclear chemistry, air and water quality, and wastes. Laboratories will include sampling, analysis, and generation of statistically-valid data while preparing students to think like environmental scientists. Environmental Sustainability Designation: Course content related to the study of sustainable development.
In a DNA double helix, each type of nucleobase on one strand bonds with just one type of nucleobase on the other strand. This is called complementary base pairing . Here, purines form hydrogen bonds to pyrimidines, with adenine bonding only to thymine in two hydrogen bonds, and cytosine bonding only to guanine in three hydrogen bonds. This arrangement of two nucleotides binding together across the double helix is called a Watson-Crick base pair. Another type of base pairing is Hoogsteen base pairing where two hydrogen bonds form between guanine and cytosine.  As hydrogen bonds are not covalent , they can be broken and rejoined relatively easily. The two strands of DNA in a double helix can thus be pulled apart like a zipper, either by a mechanical force or high temperature .  As a result of this base pair complementarity, all the information in the double-stranded sequence of a DNA helix is duplicated on each strand, which is vital in DNA replication. This reversible and specific interaction between complementary base pairs is critical for all the functions of DNA in living organisms.