Which of the following describes proteins? (A. Cell builders
(B. Cell materials
(C. Cell workers
(D. All of the above

When one dna molecule is copied to make two dna molecules, the new dna contains a) 25% of the parent dna. b) 50% of the parent dna. c) 75% of the parent dna. d) 100% of the parent dna. e) none of the parent dna.