Cell and molecular biology involves the study of process biology, including cell biology, molecular biology, ecology, genetics and hysiology. These fields overlap with other areas of biology and chemistry, particularly genetics and biochemistry.
One of four chains in oxy-hemoglobin zooming in to oxy-heme (from 1hho.pdb by B. Shaanan).
Science.gov provides access to millions of authoritative scientific research results from U.S. federal agencies.
Here are some open access journals that are freely available on the Web.