C. Synthesis of enzymes for the cell
The source code of transcription is mRNA.
Nitrogen is converted from atmospheric nitrogen (N2) into usable forms, such as NO2-, in a process known as fixation. The majority of nitrogen is fixed by bacteria, most of which are symbiotic with plants. Recently fixed ammonia is then converted to biologically useful forms by specialized bacteria.
Answer: Concave lens
Explanation: It is thinner at its center than at the edges. It helps you to see distant objects more clearly