Which of the following amino acids is a key regulator of the mTOR signaling pathway, which controls cell growth and proliferation?

A Leucine ✓
B Isoleucine
C Valine
D Phenylalanine

Explanation

Leucine is a key regulator of the mTOR signaling pathway, which controls cell growth and proliferation by sensing nutrient availability.

Source

Kim et al., Journal of Biological Chemistry
Protein Metabolism Cell Biology Cell Signaling Hard MEDICAL Confidence: high