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
Add different kinds of soil to three potted plants
Answer:
The hypothesis that eukaryotic cells evolved from a symbiotic association of prokaryotes—endosymbiosis—is particularly well supported by studies of mitochondria and chloroplasts, which are thought to have evolved from bacteria living in large cells.
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