There Are Paired and Unpaired Electrons in the Lewis Symbol

question 86

Multiple Choice

There are paired and unpaired electrons in the Lewis symbol for a phosphorus atom.

• A) 2, 4
• B) 0, 3
• C) 2, 3
• D) 4, 2
• E) 4, 3

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Definitions:

Active Transport

The movement of substances across cell membranes against their concentration gradient, requiring energy.

Cotransport Systems

Mechanisms in cell membranes that transport two different molecules across the membrane in the same direction.

Active Transport

The movement of molecules across a cell membrane from a region of lower concentration to one of higher concentration, requiring energy.

Membrane Proteins

Proteins that are found within, or attached to, the lipid bilayer of cell membranes, playing various roles in cellular functions such as transport, signal transduction, and cell recognition.