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13. true . 14.true . 15. true. Lesson 2.1 Critical Reading. 1. (1) Make up the cells and other structures of. organisms. (2) Carry out life processes. 2. Carbohydrates and lipids store energy. Carbohydrates. are the most common type of organic compound. 3. DNA consists of two polynucleotide chains, RNA. consists of just one polynucleotide chain. 4. ................
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