#Question id: 3270
#11. Evolution and Behavior
Heterozygote advantage should be most closely linked to which of the following?
#Question id: 945
#1. Molecules and their Interaction Relevant to Biology
A key precursor in the synthesis of aromatic amino acids (tryptophan, tyrosine and phenylalanine) is ________.
#Question id: 23806
#Aptitude
#Question id: 4570
#11. Evolution and Behavior
Which pair would probably have agreed with the process that is depicted by this tree?
#Question id: 3891
#3. Fundamental Processes
Protein amino acid side chains can hydrogen bond in the major groove of DNA, and discriminate between each of the four possible base pairs. In which one of the following groups of amino acids can all three members potentially be used in such DNA-protein recognition?