Which statement about animal cell junctions is not true? a ....

Which statement about animal cell junctions is not true? $a .$ Tight junctions are barriers to the passage of molecules between cells. b. Desmosomes allow cells to adhere firmly to one another. $c .$ Gap junctions block communication between adjacent cells. d. Connexons are made of protein. $e .$ The fibers associated with desmosomes are made of protein.

Which statement about animal cell junctions is not true?
$a .$ Tight junctions are barriers to the passage of molecules between cells.
b. Desmosomes allow cells to adhere firmly to one another.
$c .$ Gap junctions block communication between adjacent cells.
d. Connexons are made of protein.
$e .$ The fibers associated with desmosomes are made of protein.

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Key Concepts

Connexons

Connexons are the protein complexes that make up the channels of gap junctions. Each connexon is formed by the assembly of connexin proteins and aligns with connexons of adjacent cells to form a continuous pore for molecular exchange.

Gap Junctions

Gap junctions are specialized intercellular connections that facilitate direct communication between adjacent cells. They consist of channels that allow the passage of ions and small molecules, enabling synchronized cellular activities.

Tight Junctions

Tight junctions are structures in animal cells, particularly in epithelial tissue, that form a seal between adjacent cells. They act as barriers controlling the passage of molecules through the intercellular space and help maintain cell polarity.

Desmosomes

Desmosomes are adhesive junctions that bind neighboring cells together, providing mechanical strength to tissues. They connect cells through proteins and are linked to intermediate filaments, helping distribute stress throughout the tissue.

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