The option that is not an important er-resident enzyme that modifies proteins in the secretory pathway is D) Sec61.
The smooth ERare those enzymes that take part in the synthesis of lipids as well as the phospholipids, and they carry out important role in the formation of new cellular membrane.
Some important er-resident enzyme are:
Therefore , option D is correct.
The options for the question are:
A) oligosaccharyl transferase
B) BiP
C) protein disulfide isomerase
D) Sec61
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