Select ALL amino acids that the material identifies as solely ketogenic.
Answer
Leucine, Lysine
Explanation
The notes identify **leucine and lysine** as the only amino acids among the basic set of 20 that are solely ketogenic. Isoleucine and tyrosine are described as both ketogenic and glucogenic. **Key takeaway:** Leucine and lysine are exclusively ketogenic in this classification. **Glossary:** Ketogenic: degraded to products such as acetyl-CoA or acetoacetyl-CoA.