Which of the following statements about cell signaling is CORRECT?
A)Signaling pathways and the molecules involved (e.g., kinases)evolved before the evolutionary split between plants and animals and thus are similar in the two groups.
B)Molecular mechanisms for signaling between cells exist in complex multicellular organisms, but not single-celled eukaryotes.
C)All animals have gap junctions to allow targeted signaling between cells.
D)Signaling molecules are generally polysaccharides that activate receptors on target cells and activate or repress gene expression.
E)Only cells on the exterior surface of an organism have receptors to detect environmental signals.

Question

Quizplus · Accepted Answer

Signaling pathways and the molecules involved, such as kinases, evolved before the evolutionary split between plants and animals, which is why they are similar in the two groups.

Which of the Following Statements About Cell Signaling Is CORRECT