Task: Class Definition Understanding (ontology: Sciences/Biology)

Which of the following definitions best describes 'mitotic S phase'?

A. The cell cycle phase, following G1, during which DNA synthesis takes place as part of a mitotic cell cycle.
B. The cell cycle phase, following G1, during which DNA synthesis takes place as part of a meiotic cell cycle.
C. The binding activity of a molecule that brings together a lipid droplet with an endoplasmic reticulum membrane, via membrane lipid binding, to establish membrane contact sites and mediate exchange and communication.
D. Catalysis of the reaction: 2 H+ + O2 + oxalate = 2 CO2 + H2O2.

Answer: The cell cycle phase, following G1, during which DNA synthesis takes place as part of a mitotic cell cycle.