Question

A portion of the amino acid sequence of an enzyme from a worm is shown below.

-Q-Q-Q-N-N-N-C-C

Analyze the same portion of the same enzyme taken from several other organisms. Place them in order from most closely related to the worm most distantly related to the worm.

-Q-R-Q-N-S-S-C-C- organism X

-Q-Q-Q-N-N-S-C-C- organism Y

-Q-Q-R-N-S-N-C-C- organism Z

a. Z,Y,X
b. Y,Z,X
c. X,Z,Y
d. Y,X,Z