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What are the two main types of synthesis reactions?

  1. Photosynthesis and Decomposition

  2. Accumulation and Degradation

  3. Catabolism and Anabolism

  4. Assimilation and Dilution

The correct answer is: Catabolism and Anabolism

Synthesis reactions are chemical reactions in which smaller molecules combine to form larger, more complex molecules. The two main types of synthesis reactions are catabolism and anabolism, also known as constructive metabolism and destructive metabolism, respectively. Catabolism is the breakdown of larger molecules into smaller ones, while anabolism is the opposite, the building up of smaller molecules into larger ones. This makes options A, B, and D incorrect as they do not describe the process of synthesis, but rather other processes.