Final answer:
Dehydrogenation is the process that does not yield free ammonia, unlike deamination and transamination, which involve the transfer or removal of amino groups potentially resulting in the formation of ammonia.
Step-by-step explanation:
The student has asked, 'Which of the following does not yield free ammonia?' The options are a) Deamination, b) Dehydrogenation, c) Transamination, and d) None of the above. To answer this question, it is essential to understand what each process entails.
- Deamination is the removal of an amino group from amino acids, either via non-oxidative or oxidative pathways. In oxidative deamination, the amino group is removed following its oxidation, producing ammonium (NH4+), which can be further processed or excreted.
- Dehydrogenation is not directly related to the removal of an amino group but instead involves removing hydrogen atoms from molecules, typically in pathways generating energy.
- Transamination involves the exchange of an amino group from one amino acid to a keto acid, effectively transferring rather than removing the amino group.
Given this information, dehydrogenation does not produce free ammonia as its primary objective or by-product, distinguishing it from deamination and transamination that involve the transfer or removal of amino groups, potentially forming ammonia.