Why is porinsulin so called ? How is insulin differnet form it?

Why is pro insulin so called ? How is insulin different form it?

Explain structure of Insulin. How insulin is synthesised in human (or mammals)? Why is proinsulin so called? How is insulin different from it?

Why is blind spot so called ?

Why is nylon -66 so called ?

Why is a transistor so called ?

Why transistor is so called?

Why is Golden Rice called so?

Why is Golden Rice called so?