Which atomic orbital combination would result in a molecular sigma bond?

A)
B)
C)
D)

Peptide bonds are ________.

A) ester linkages
B) imido linkages
C) ether linkages
D) amide linkages
E) disulfide linkages

Which of the following are intermediates in the acid hydrolysis of an amide?

A) 1
B) 2
C) 2 & 3
D) 4
E) 1, 2, & 3

Which of the following is the most reactive carboxylic acid derivative?

A) ester
B) anhydride
C) nitrile
D) acid chloride
E) amide