One potential cause of valve dysfunction is rupture of the chordae tendineae why would this lead to valve dysfunction

Agene with the original sequence of atgtt—tact underwent substitution mutation to form atatt—tact after a few generations. tact is a part of a muscle protein encoding region, and atgtt codes for a digestive enzyme. what will be the effect of this mutation? a. the production of muscle protein will be affected. b. the production of digestive enzymes will be affected. c. the production of both the protein and the enzyme will be affected. d. the production of neither the protein nor the enzyme will be affected.

What is usually (but not always) related to the metabolic processes of living organisms in its organic form?

This is a biological reaction due to a stimulus. i need this quickly !