The egg-white is alkaline (basic), while the yolk is slightly acidic. The white is more alkaline in free-range chickens, partly due to their diet.
yolks - like egg yolks
Yes! The yolks have nutrition and energy for you.
Nothing, I'm afraid. Egg yolks are very niche in their properties, as such they have no good substitutes.
It is a richer custard if you use just yolks. But you can use more yolks than whites and it will still be yummy.
Egg yolks and oil. Usually a little vinegar or lemon juice is also added for flavor.
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Yema is Spanish for egg yolks, but it also is the name for a traditional Spanish confection made from egg yolks and sugar. They are very popular in parts of Spain and sometimes are referred to in the U.S. as candied egg yolks.
raw egg yolk, cooking oil and vinegar The related link below tells you how.
Two medium egg yolks can be used to make one large yolk.