Given a paragraph about cooking, and a set of conversational question answers about the paragraph, generate a relevant question to the topic of the paragraph. The paragraph has the prefix 'CONTEXT:'. Each conversation question has a prefix `Q:` followed by the answer prefix `A:`.
Q: CONTEXT: Breads get their structure from glutens--a type of protein formed by the combination of glutenin with gliaten. Kneading and resting the dough helps the formation of glutens--I assume by shifting glutenin and gliatin molecules around, this increases the odds of bindings occurring.Oils can bind to glutenin and gliatin and inhibit these reactions, so fats--oils and butter--definitely play a role in the texture control.It prevents the dough from getting too elastic, which controls texture. This elasticity change would also change the maximum air bubble size. Altering resting times and yeast quantity also change these, but trading off for a different flavor. Oil may play other roles, but these are what I recall reading about off the top of my head. Yes, it does contribute to flavor as well.  <sep>  Q: What is the purpose of oil or butter in bread? A: fats--oils and butter--definitely play a role in the texture control 
A: 
Is there a purpose to adding oil and butter to potato or wheat dough?