During protein synthesis, what does mRNA do? A It strings together two complements RNA strands
B It constructs proteins out of random amino acids
It strings together two complementary DNA strands
D It delivers DNA's instructions for making proteins to the ribosome

No direct answer but this might help out a little bit: <3

Explanation:

The mRNA is an RNA version of the gene that leaves the cell nucleus and moves to the cytoplasm where proteins are made. During protein synthesis, an organelle called a ribosome moves along the mRNA, reads its base sequence, and uses the genetic code to translate each three-base triplet, or codon, into its corresponding amino acid.

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explanation:

bacterium is not correct