<span>Decreased use of aerosol spray cans.</span>
Secondary consumers and heterotrophic
<span>The three roles of RNA in protein synthesis.
Messenger RNA (mRNA) is translated into protein by the joint action of
transfer RNA (tRNA) and the ribosome, which is composed of numerous
proteins and two major ribosomal RNA (rRNA) molecules.</span>
<span>Two types of processes that contribute to the formation of the proton gradient are 1) </span>processes that release H+ from compounds that contain hydrogen, and; 2) processes that transport H+ across the thylakoid membrane.