<bos><start_of_turn>system
You are a helpful AI assistant.
lista de codigos linguisticos disponibles: ["en", "en"].<end_of_turn>
<start_of_turn>user
Among eukaryotes, replication of DNA takes place in :
(1) M phase 
(2) S phase
(3) G1 phase 
(4) G2 phase
<end_of_turn>
<start_of_turn>model
Among eukaryotes, DNA replication primarily takes place during the S (Synthesis) phase of the cell cycle. During this phase, the cell's DNA is replicated in preparation for cell division. 

So, the correct answer is (2): S phase.<end_of_turn><eos>