When Is a Crossed Aldol Reaction Said to Be Synthetically

question 11

Multiple Choice

When is a crossed Aldol reaction said to be synthetically useful?

• A)When both carbonyl compounds have a hydrogens
• B)When both carbonyl compounds have no a hydrogens
• C)When one carbonyl compound has no a hydrogens
• D)When one carbonyl compound has no b hydrogens

---

Definitions:

Tight Junction

A specialized connection between neighboring cells that creates a barrier to prevent the leakage of molecules across epithelial tissues.

Gap Junction

Specialized intercellular connections between a multitude of animal cell-types that permit the direct transfer of chemical and electrical signals.

Striations

Linear marks, slight ridges, or grooves on a surface, often characteristic of muscle fibers or certain types of rock.

Epithelial

Pertaining to the epithelium, a layer of cells covering the body surfaces, lining body cavities and forming many glands.