1. I. What molecule holds instructions tor the synthesis of proteins and copies itselt tor the next generation ot cells? A. ATP synthase B. DNA C. RNA D. NAD E. FAD 2. 2. Strands of DNA are joined by A. hydrogen bonds. B. covalent bonds. C. ionic bonds. D. phosphodiester bonds. 3. 3. If you were watching a cell undergoing a doubling of the dna in its nucleus, you would be observing A. protein synthesis. B. aerobic respiration. C. replication. D. substrate-phosphorylation. E. photosynthesis. 4. 4. The enzyme that adds nucleotides to form new strands of DNA is A. interphase. B. prophase. C. ligase. D. helicase. E. DNA polymerase.

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Abiogenesis