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Which is the transport process that does NOT require the presence of a carrier called?
A. Active transport.
B. Passive diffusion.
C. Facilitated diffusion.
D. None of the above.
Passive diffusion involves the transfer of a substance from a region of higher concentration to one of lower concentration without a carrier. Meanwhile, active transport and facilitated diffusion both require carriers that combine with the transported substance.
 
 
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PillBill
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Been a pharmacist for about three years now.
 
 
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This set of PCAT Biology questions has been donated by The PCAT Professor.
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Added: 8/11/2008
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Audience: University / College
Tags: Biology, PCAT
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This is a study guide to help future pharmacists prepare for the PCAT.
 
 
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maelbe
maelbe says:
Wonderful the PCAT preparation on STUDYBARN.
Posted: 1/5/2012