What forms the barrier of the tight junctions that seals off the space between adjacent cells?
A)paired rows of aligned integral membrane proteins
B)paired rows of aligned phospholipids
C)paired rows of carbohydrates
D)paired rows of polynucleotides
E)interdigitating integral membrane proteins

Question

Quizplus · Accepted Answer

Tight junctions are composed of paired rows of integral membrane proteins, such as claudins and occludins, that interlock with each other and seal off the space between adjacent cells. Phospholipids, carbohydrates, and polynucleotides do not form the barrier of tight junctions. Interdigitating integral membrane proteins are a feature of desmosomes, not tight junctions.

What Forms the Barrier of the Tight Junctions That Seals