Bile salts emulsify fats, causing breakdown of triglycerides and chylomicrons in the small intestine allowing for their absorption.

Pancreatic juice contains lipase which is the enzyme responsible for fat digestion.

A deficiency of either (e.g. cystic fibrosis) can cause steatorrhoea (or fatty stools)

Yeast is not an intracellular enzyme, it is a unicellular fungi, some species of which are used in fermentation and to leaven bread. The organism yeast, does possess intracellular enzymes (as do most other cellular organisms!) :) i hope that answers your question.