Answer:
I think true statement is A.
Chemically speaking, enzymes are composed of chains of amino acids, and they are considered to be a type of protein.
An example of osmosis is when the water leaves the tubules of the kidney in response to the hypertonic fluid surrounding the tubules. Osmosis in the kidneys is a filtration. Osmosis will filter the water molecules and solutes in the kidneys from the plasma to the tubule. The other choices given are not an example of osmosis. The correct answer to this question is A.
