The diagram represents a basic cell signalling pathway where a signal molecule produces a response, for example a secretion. signal molecule → P → Q → response Which row correctly identifies P and Q?
- AP: activated enzyme in cytoplasm; Q: target in cell surface membrane
- BP: lipid in cell surface membrane; Q: extracellular enzyme
- CP: protein in cell surface membrane; Q: activated enzyme in cytoplasm
- DP: target in cytoplasm; Q: protein in cell surface membrane