The same Protein X was purified from tissue source A and tissue source B, yielding the following results: Protein X, sample A: specific activity = 1000 U/mg; fold-purification = 100 Protein X, sample B: specific activity = 100 U/mg; fold-purification = 1000 Which of the following statements are correct? Each correctly assigned choice will earn you 0.2 marks.

options: Protein X, sample A has a higher level of purity than Protein X, sample B.

Protein X, sample B has a higher level of purity than Protein X, sample A.

Tissue source A has a higher specific activity for Protein X than tissue source B.

Tissue source B has a higher specific activity for Protein X than tissue source A.