The usual Asimov style. We get a description of the chemistry involved along with various history and background information.

Unfortunately the book did not really answer the primary question I had regarding photosynthesis which is the business of how electrons are shuttled around chloroplasts dribbling out small increments of energy but, to be fair, it seems that this was not known when the book was written.
At the very least the book did give me enough of an overview of the process to be able to strip out the background and look for the more interesting stuff in my big modern biochemistry textbook. ( )