Model the steps of protein synthesis, starting with a single strand of nucleotides and ending with a protein.

protein synthesis is the processes in which in cells make proteins

it occurs in two stages; transcription and translation

transcription is the transfer of genetic instructions. in dna to mRNA in the nucleus

it includes 3 steps: intiation elongation and termination

correct answer is option a.

tropopause, stratopause and mesopause have all in common aspect that is point of maximum temperature in its layer of the atmosphere. all layers of atmosphere observe abrupt change in temperature. tropopause is the boundary between troposphere and stratosphere. stratopause is the boundary between stratosphere and mesosphere. mesopause is the boundary between mesosphere and thermosphere. these all boundaries are ranges between altitude of 0 to 80 km.