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Question
Biology
Posted 7 months ago
discuss the categories and type of protein transport and name a molecule associated with each type
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Answer from Sia
Posted 7 months ago
Answer
Protein transport can be categorized into passive and active transport, each with different types and associated molecules.
Solution
a
Passive Transport: This does not require energy and includes diffusion and facilitated diffusion
b
Diffusion: Simple diffusion allows small, nonpolar molecules to pass through the cell membrane. Example molecule: Oxygen (O2)
c
Facilitated Diffusion: Utilizes transmembrane proteins to transport larger or polar molecules. Example molecule: Glucose, transported by GLUT transporters
d
Active Transport: Requires energy, usually in the form of ATP, to move molecules against their concentration gradient
e
Primary Active Transport: Directly uses ATP to transport molecules. Example molecule: Sodium ions (Na+), transported by the Na+/K+ ATPase pump
f
Secondary Active Transport: Uses the electrochemical gradient created by primary active transport. Example molecule: Amino acids, transported by co-transporters like the Na+-amino acid symporter
Key Concept
Protein transport is essential for maintaining cellular homeostasis and can be classified into passive and active types, each involving specific molecules and mechanisms.
Explanation
Passive transport moves molecules along their concentration gradient without energy, while active transport moves molecules against their gradient using energy, typically from ATP.

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