Which description explains the role of the tRNA in the process shown in this model?
A. The model delivers amino acids to the ribosome so that they can be added to the developing peptide
B. The model recognizes the stop codon of a developing peptide so that no new amino acids are added.
C. The model signals the release of the peptide from the ribosome once all of the amino acids have been
added.
D. The model scans the developing peptide to make sure that the sequence of the amino acids matches
the mRNA.

the dna molecules have a negative charge because of the phosphate groups in their sugar-phosphate backbone, so they start moving through the matrix of the gel towards the positive pole. power is turned on and dna fragments migrate through gel (towards the positive electrode).

explanation:

in a chemical reaction, the atoms and molecules produced by the reaction are called products. no new atoms are created, and no atoms are destroyed. in a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.