20. Define and give an example of radiation:

Radiation is the process of sending energy i. the form of light, heat, or nuclear particles.

An example: Radio waves, or waves produced from your mobile phone.

regulation of gene expression. gene expression can be regulated by various cellular processes with the aim to control the amount and nature of the expressed genes. these regulatory proteins bind to dna and send signals that indirectly control the rate of gene expression

explanation:

answer; atp and nadph;