Given the background description of some cooking related query, summarize the question into a title

Q: I've seen many recipes that use sour yogurt as a main ingredient, but I've been unable to find sour yogurt where I live, and I wonder if it's ok to use sour cream instead of sour yogurt.I know they're pretty much the same thing, but I'm not sure if it's going to change the composition/texture of the food by making this substitution. If it's not recommendable, what would be a good substitution? For example would it be better to use plain yogurt? Like the one sold at Walmart even though is a bit sweet. Thanks

A: Is it ok to use sour cream as substitute of sour yogurt?
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Q: I'm building a breadbox that will hold multiple loaves of bread. I was wondering if it would be a good idea to put a gasket around the lid to reduce air infiltration but I don't know what is more important. So is the key to keep out light or air or both?

A: What makes bread mold grow; light, air or both?
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Q: I got an apple chutney recipe from a friend. It's an old family recipe and it specifically says to chop the apples but to NOT core or peel them. The recipe is basically just apples and pears, red onions, raisins, brown sugar, cider vinegar and various spices which you simmer gently for a couple of hours. It says nothing about straining or grinding. The onions are finely sliced and it says "chop apples and pears roughly but without coring."Does the vinegar somehow soften the seeds and core of the apple? Is that important to the taste or texture? I am hesitant to used the whole apple as most recipes I have found online say to core or even peel and core.

A:
Using whole uncored apples in chutney?
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