<prompt> Tyrosine enters gluconeogenesis by forming which substrateSuccinyl CoAAlpha - ketoglutarateFumarateCitrate  <response>: Sources of Gluconeogenesis uGluconeogenesis is the process by which glucose molecules are produced from non-carbohydrate precursors. uNon carbohydrate precursors include lactate, glucogenic amino acids, glycerol pa of fat and propionyl CoA derived from odd chain fatty acids. DM Vasudevan , Textbook of Biochemistry for Medical Students , 7th ed, page 119 