Do Bananas have radiation?
Bananas are slightly radioactive because they contain potassium and potassium decays. Potassium is a necessary substance for healthy operation of your body. You would have to eat a LOT of bananas just to compete with the natural potassium dose of your body.
Why are bananas curved?
Bananas go through a unique process known as negative geotropism. Instead of continuing to grow towards the ground, they start to turn towards the sun. The fruit grows against gravity, giving the banana its familiar curved shape.