How do micro-organisms change large organic molecules to forms that can be
absorbed and used inside the cells?

The se-ci  bonds is more polar  than s-br bond

I’m really not sure what’s the answer. sorry

B.1 - hydrogren-1 can only mean there is 1 neutron. it's obvious there is 1 proton or else it wouldn't be hydrogen, so they wouldn't put a number after it unless they were indicating the number of neutrons