Multiple choice

Which of the following pairs of 'protein - its function' is incorrectly matched?

  1. Antiporter - involved in secondary active transport of two or more different molecules or ions across a phospholipid membrane

  2. Uniporter - integral membrane protein that is involved in facilitated diffusion

  3. Cotransporters - downward movement of one solute from high to low concentration to move another molecule upward from low to high concentration

  4. Symporter - transports differing types of molecules across the cell membrane

  5. Antiport - two species of ion or other solutes are pumped in opposite directions across a membrane
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This option is correct. Symport is a downward movement of one solute species from high to low concentration to move another molecule upward from low concentration to high concentration. Cotransporters couple the favorable movement of one molecule with its concentration gradient and unfavorable movement of another molecule against its concentration gradient.

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