Final answer:
In the context of a biology textbook, 'cheese' is referenced on page 305. The question falls under the subject of Biology and is suitable for College students.
Step-by-step explanation:
The information provided appears to be page numbers from an index or referencing system, likely from a biology textbook. The subject of this question is Biology as the included references are to biological terms such as kilocalorie, cheese, chancroid, Chargaff's rules, chemically defined medium, chemiosmosis, and other biological processes and subjects. It seems that the student is inquiring about the code indicating 'cheese', which based on the list provided, refers to page 305. This question is of difficulty suitable for College use due to the advanced nature of some of the biological terms included.