It spread by person to person
Mitochondria are known as the powerhouse of cells because they are responsible for the releasing of energy from food. For example: cellular respiration.
Lactase will most likely be found in the small intestine and food spends the largest time there.
The digestive system refers to all the structures that are responsible for the breakdown of food in the body. In each part of the digestive system, enzymes act on the food particles to enable certain conversions.
The enzyme lactase in involved in the digestion of milk and diary products. The enzyme has an optimum pH of about 6 hence it works in an acidic environment. Lactase is found in the small intestine.
Learn more: brainly.com/question/32531
