Chest freezers were often kept in garages and other cold places and worked efficiently (and economically) by not having to fight central heating temperatures. I have read your column for years, and been impressed with the clear explanations you normally provide.
Amino acids are found in animal sources such as meats, milk, fish, and eggs. They are also found in plant sources such as soy, beans, legumes, nut butters, and some grains (such as wheat germ and quinoa). You do not need to eat animal products to get all the protein you need in your diet.
Protein synthesis is just the fancy way of saying making proteins. Proteins are one of the three main groups of molecules needed for life; the others are carbohydrates and fats. We eat protein when we eat meats such as beef, pork, chicken, fish and lamb. What we are actually eating is the animal's muscles, and muscles are made of protein. Proteins come in all shapes and sizes and these molecules have a huge variety of functions.