Symport Is a Transport System in Which the Transport of One

question 45

Multiple Choice

Symport is a transport system in which the transport of one solute:

• A)occurs via a vesicle.
• B)occurs without the simultaneous transport of another solute.
• C)depends on the transport of another solute in the opposite direction.
• D)depends on the transport of another solute in the same direction.
• E)depends on the opening of a "gate" in the carrier protein.

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Definitions:

Integrins

Receptor proteins that bind to specific proteins in the extracellular matrix and to membrane proteins on adjacent cells; transmit signals into the cell from the extracellular matrix.

Middle Lamella

The middle lamella is the layer of pectin-rich material between the cell walls of adjacent plant cells, acting as a cementing agent to hold them together.

Fibronectins

Glycoproteins of the extracellular matrix that bind to integrins (receptor proteins in the plasma membrane).

9 + 2 Arrangement

A common structure observed in eukaryotic flagella and cilia, consisting of nine double microtubule pairs surrounding two central microtubules.