unnecessary

In autophagy, damaged or unnecessary proteins are enclosed in small membrane-bound vesicles and then broken down safely by enzymes, effectively recycling cellular components.

But don’t use the existence of such deals to justify an unnecessary purchase.

Setting aside this money, she said, “prevents unnecessary credit-card usage and financial guilt.”

“We’re delighted by Google’s success,” the company said in a totally unnecessary statement.

The difficulty was scale: thousands of phosphine ligands exist, and experimentally screening them for an unfamiliar reaction would be slow, labor-intensive, and generate unnecessary chemical waste.