Question

identify the mismatched pair.
enzymes-speed up chemical reactions
receptor proteins-bind to extracellular ligands
channel proteins-provide passageway for ions
recognition proteins-allow immune system to identify \self\
carrier proteins-allow a cell to move to a new location

Explanation:

• Enzymes are biological catalysts that speed up chemical reactions, so this pair is matched.
• Receptor proteins on cell membranes bind to extracellular ligands (like hormones, neurotransmitters), so this pair is matched.
• Channel proteins (like ion channels) provide a passageway for ions to cross the membrane, so this pair is matched.
• Recognition proteins (e.g., glycoproteins) help the immune system distinguish "self" from "non - self", so this pair is matched.
• Carrier proteins are involved in the transport of substances (like glucose, amino acids) across the cell membrane, either by facilitated diffusion or active transport. They do not allow a cell to move to a new location (cell movement is related to structures like cilia, flagella, or cytoskeletal rearrangements). So the pair "Carrier proteins - allow a cell to move to a new location" is mismatched.

Answer:

Carrier proteins - allow a cell to move to a new location