Which of the following is NOT a function of lysosomes?

A. Tight junctions: Tight junctions form impermeable seals between adjacent cells, preventing leakage of substances across epithelial layers. Their primary role is barrier formation rather than providing strength against mechanical stress.

B. Gap junctions: Gap junctions consist of protein channels that allow ions and small molecules to pass directly between cells. They are important for communication and electrical coupling but do not serve as anchors against mechanical forces.

C. Connexons: Connexons are the protein subunits that form the channels in gap junctions. While essential for intercellular communication, they do not function in distributing mechanical tension or preventing tissue tearing.

D. Desmosomes: Desmosomes are anchoring junctions that attach cells to one another through intermediate filaments. They provide strong mechanical linkage, distribute tension across the tissue, and reduce the risk of tearing under stress.

A. Triglyceride: Triglycerides are composed of glycerol and three fatty acids and serve as energy storage, not chains of amino acids.

B. Nucleic acid: Nucleic acids, such as DNA and RNA, are polymers of nucleotides, not amino acids.

C. Protein: Proteins are long chains of amino acids linked by peptide bonds. Their sequence and structure determine their function in enzymes, structural support, transport, and signaling.

D. Polysaccharide: Polysaccharides are long chains of monosaccharides (sugars) and function mainly in energy storage and structural support, not as amino acid chains.