#Question id: 959
#Unit 1. Structure and Function of Biomolecules
Phenylalanine hydroxylase requires molecular ________ and tetrahydrobiopterin.
#Question id: 960
#Unit 1. Structure and Function of Biomolecules
Which amino acids are purely ketogenic?
#Question id: 961
#Unit 1. Structure and Function of Biomolecules
Which type of organisms can eliminate excess nitrogen by the direct excretion of ammonia?
#Question id: 962
#Unit 1. Structure and Function of Biomolecules
The carbon in urea originates from ________.
#Question id: 963
#Unit 1. Structure and Function of Biomolecules
________ is hydrolytically cleaved to directly yield urea in the urea cycle.
#Question id: 964
#Unit 1. Structure and Function of Biomolecules
In mammals, ureogenesis occurs almost exclusively in the ________.