If DNA is a long chain of genes, where does one gene stop and the next gene begin?

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.

when the displaced particles are perpendicular to the direction the wave travels, is called a transverse wave, whereas in longitudinal wave the displace practices are parallel to the direction of the wave.

in the given image:

first image shows - longitudinal wave

second image shows - transverse wave

third image shows - longitudinal wave

fourth image shows - longitudinal wave

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.