Q1. A medical researcher used a tube to remove some of the liquid from a person's stomach. The researcher put the liquid into a flask which had a piece of boiled beef in it. The beef was digested in six hours.

(a) (i) What type of substance in liquid from the stomach caused the beef to be digested in six hours

(ii) The researcher kept the flask at 37°C. Explain why.

(b) In the human body, the digestion of protein in the stomach and is completed in the small intestine.

(i) What is digested protein used for in the body?

(ii) Describe how the products of digestion get from inside the small intestine to the cells in the rest of the body.​