You are studying an e. coli gene that specifies a protein. a part of its sequence is: –ala–pro–trp–ser–glu–lys–cys–his– you recover a series of mutants for this gene that show no enzymatic activity. by isolating the mutant enzyme products, you find the following sequences: mutant 1: –ala–pro–trp–arg–glu–lys–cys–his– mutant 2: –ala–pro– mutant 3: –ala–pro–gly–val–lys–asn–cys–his– mutant 4: –ala–pro–trp–phe–phe–thr–cys–his– what is the molecular basis for each mutation? what is the dna sequence that specifies this part of the protein?

What best describes the structure of the declaration of independence?

Based on the observation that only male crickets produce a song, you hypothesize that a male's song is a form of communication to potential mates. you set up a simple experiment to test this hypothesis. in the laboratory, you place a male snowy tree cricket in enclosure a, which is adjacent to enclosureb. in enclosure b, you place other insects, one at a time, and observe their responses to the male's song. the enclosures are designed so that the two insects being tested cannot see or smell each other, but sound is transmitted from enclosure a to enclosureb.

Amines amides and amino acids are categories of