1. The enzyme DNA helicase breaks the hydrogen bonds between bases on the two polynucleotide DNA strands. This makes the helix unwind to form two single strands.
2. Each original strand acts as a template for a new one. Complementary base pairing means that free DNA are attracted to their complimentary exposed bases on each original template strand; A with T; C with G.
3. The enzyme DNA polymerase joins the nucleotides of the new strand together via condensation reactions. Hydrogen bonds form between the bases on the original and new strands
1- Answer : B (AUG AAA CGU CCU)
2- Answer : B (TAC AAA AGA GGG)
3- Answer : C (GGCGATACG)
3 nitrogenous bases code a single amino acid.
Embryo ,the differentiation of cells start here
