The Phosphate Transport System in Bacteria Imports Phosphate into the Cell

question 16

Multiple Choice

The phosphate transport system in bacteria imports phosphate into the cell even when the concentration of phosphate outside the cell is much lower than the cytoplasmic phosphate concentration. Phosphate import depends on a pH gradient across the membrane-more acidic outside the cell than inside the cell. Phosphate transport is an example of

• A) passive diffusion.
• B) facilitated diffusion.
• C) active transport.
• D) osmosis.
• E) cotransport.

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Definitions:

Protein Synthesis

Protein synthesis is the biological process in which cells build proteins based on the genetic instructions encoded in DNA.

Membrane Channels

Proteins in cell membranes that allow the passage of ions or molecules in and out of the cell.

Phospholipids

A type of lipid molecule that is a major component of all cell membranes, providing structural integrity and involved in signaling pathways.

Proteins

Large molecules made up of amino acids that perform a variety of functions in the body, such as catalyzing metabolic reactions and supporting cell structure.