You Have Discovered a Protein That Transports Ca²⁺ Up a Concentration

question 80

Multiple Choice

You have discovered a protein that transports Ca²⁺ up a concentration gradient, from the cytoplasm into the endoplasmic reticulum. No other ions move during this transport. What type of transport protein does this appear to be?

• A) a Ca²⁺ channel
• B) a Ca²⁺ ion porin
• C) a primary active uniporter
• D) a secondary active uniporter
• E) an ionophore

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