Multiple Choice
As shown in this figure, the valine and lysine in this protein are linked by covalent bonds within the ________ structure, whereas the hydrogen bonds hold together molecules within the helical ________ structure. 
A) primary; secondary
B) secondary; tertiary
C) tertiary; quaternary
D) primary; tertiary
E) secondary; quaternary
Correct Answer:

Verified
Correct Answer:
Verified
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