How is chemistry applicable to other fields that affect our lives?
The major breakthroughs done in chemistry and biology have affected us predominantly through the medical field. Medicine and antibiotics wouldn't exist if we didn't understand organic chemistry, how the structure of molecules changes upon reaction, and the optimal environment for medications.
The cell is an interactive unit of entity that relies on many mechanisms to survive. How does its ability to survive be understood by biochemistry?
Cells all need to utilize and create energy to survive, and obtain resources. The harness of all this energy, in the form of ATP, can be understood very well biochemically due to how well known cellular respiration is. To elucidate this picture, scientists and researchers have to freeze-etch these molecules, usually mid-process to understand the overall picture of how cells can create ATP.
How does "old-school" techniques used in genetics affect our lifestyles in this modern era?
Earlier genetic researchers such as Morgan and Sturtevant had to go through extensive processes to obtain a genetic map for organisms such as the Drosophila fly shows us how complex the world of genetics is. It's not only about finding what genes get passed on, but how these genes get passed on to the next generations and what other miscellaneous things that can happen, like homologous recombination, that can affect the phenotypes. Understanding the relative locations of alleles is a long process because we need to grow 2 generation of flies, and we will need to sort the flies for the F2 generation based on the various phenotypes that are seen (if there are 3 genes to map, there are 8 possible phenotypes, 4 genes to map, 16 possible phenotypes). The fact that we are able to understand genetic mapping and apply them in everyday settings today is thanks to these individuals.