Cell surface receptors used in cell signaling are usually proteins that extend from one side of the membrane to the other side of the membrane. what is the role of the extracellular part of the protein? A binding the signaling molecule
B afunctioning as an enzyme
C increasing the solubility of the receptor
D transmitting the signal from the target cell

Cold case files recently began re-investigating an old murder case. the murder took place in the park; a young man, james, was hit over the head with a brick and killed. police suspected the jealous former boyfriend of james' wife, karen. whoever killed james may have washed their hands in a near-by bird bath as detectives found blood in the bird bath. since the murder took place before dna fingerprinting was available, the suspected killer, ronnie, went free. detectives are now reviewing the blood evidence using dna fingerprinting. based on the dna fingerprints of all possible suspects, who is james' killer?

Explain the source of radioactivity in uranium in earth’s crust by which it produces nuclear radiation

Which is one example of a phenotypic change that is not genetic