Chirality refers to the property of asymmetry in a molecule, where the molecule cannot be superimposed on its mirror image. Chiral molecules have non-superimposable mirror images called enantiomers. Chirality is important in fields such as chemistry and biology due to its influence on the behavior and interactions of molecules.

Doing vibrational spectroscopy on nontoxic molecules, examining the chirality shift of acid-catalized hydrolyzing sucrose rather than toxic chemicals... etc.

No, an organism with biomolecules of opposite chirality would not survive on Earth because life on Earth is based on homochirality, meaning that all biological molecules have the same chirality. The presence of molecules with opposite chirality would disrupt essential biological processes and likely be incompatible with our existing biochemical pathways.

Chirality of a fermion is determined by the interaction with the Higgs field. In the Standard Model, the Higgs mechanism is responsible for giving mass to fermions and changing their chirality. Flavor-changing interactions, such as weak interactions, can also potentially change the chirality of fermions.

Biochirality is the chirality - of biological molecules, especially the study of the genesis of such chirality - the phenomenon by which two biological molecules are symmetrical.