Three important enzymes remove ammonia from body cells. One is carbamoyl phosphate synthetase I. What are the other two?
A) branched-chain alpha-keto acid dehydrogenase and phenylalanine hydroxylase
B) alanine aminotransferase and aspartate aminotransferase
C) glutaminase and threonine dehydratase
D) glutamate dehydrogenase and glutamine synthetase
Question 2
Which three amino acids cannot undergo transamination to an appreciable extent, making provision of their alpha-keto acids ineffective in lowering blood nitrogen concentrations in kidney disease patients?
A) leucine, isoleucine, valine
B) lysine, threonine, histidine
C) valine, tryptophan, phenylalanine
D) methionine, cysteine, phenylalanine