# GATE2020: 39

Which of the following strategies are used by cells for metabolic regulation?

1. Phosphorylation-dephosphorylation
2. Allostery
3. Feedback inhibition
1. $P$ and $Q$ only
2. $P$ and $R$ only
3. $Q$ and $R$ only
4. $P, Q$ and $R$
in Others
edited