No.
[”A code is a basic construct of language.”
No.]
Sure it is. To communicate, rational beings, such as a human, needs to encode complex meaning into codes which can be transmitted from a source (an intelligence) to a receiver. That is how language works.
Biology looks just like it is formed by some kind of super language. If there is a code, and if encoding exists, there must be a source for the code.
From Wikipedia:
In communications, a code is a rule for converting a piece of information (for example, a letter, word, or phrase) into another form or representation, not necessarily of the same type. In communications and information processing, encoding is the process by which information from a source is converted into symbols to be communicated. Decoding is the reverse process, converting these code symbols back into information understandable by a receiver.