41.
Match the products in Group I with the applications in Group II.
Group I Group II
P. Digoxin 1. Muscle relaxant
Q. Stevioside 2. Anti-cancer agent
R. Atropine 3. Cardiovascular disorder
S. Vinblastine 4. Sweetener

47.
Cell type A secretes molecule X into the culture medium. Cell type B in the same culture responds to the molecule X by expressing protein Y. Which one of the following modes of signaling represents the interaction between A and B?