What is the main trend shown in the graph?

The  central dogma  of molecular biology is centered upon the process of protein synthesis, in which the information from dna is transcribed and translated, resulting in multiple amino acids being joined to form a)lipidsb)proteinsc)carbohydratesd)nucleic acids

Which of these parts of the membrane large moecules pass through it ?

Ascientific idea becomes valid when it is what?