more esqs

Question 1

describe the mechanism for the absorption of amino acids in the ileum.
[4 marks]

Answer 1

facilitated diffusion of amino acid into cell
co-transport
sodium ions AT from cell to blood capillary
creates sodium ion conc gradient
facilitated diffusion of amino acid into blood/ capillary.

Question 2

describe how an ATP molecule is formed from its component molecules. [4 marks]

Answer 2

ATP is formed by joining adenine, pentose and 3 phosphates
condensation reaction
ATP synthase