Rb is a protein that plays different roles during the cell cycle depending on its level of phosphorylation. In G0 phase, what would its state and its role be?

MCQs on the cell and its structures, including molecular compounds, structural features, and organelles including the nucleus, cytoskeleton, and extracellular matrix. Particular emphasis on transport mechanisms and membrane trafficking, cellular signaling, the cell cycle including mitosis and meiosis, and gene expression.