Answer: The correct answer is C) To move proteins and other substances through the cell.
The organelle labelled 'F' in the given diagram is Endoplasmic reticulum. It is a specialized organelle present in eukaryotic cells, which is made up system of interconnected membrane- enclosed sacs ( cisternae). It is present in continuity with the outer membrane of the nucleus.
It serves many function to the cell like folding of proteins, transport of proteins and other substances through the cell.
Out of the choices given, the reason why Kathy's body feels sore and she has pain in her limbs after vigorously exercising is an accumulation of lactic acid in the muscles of her limbs. The correct answer is A.
