<span>B. respiratory and circulatory
When oxygen is inhaled it is then brought to the lungs. It soon goes through a series of steps which guide's the oxygen (which are now molecules) to the blood. The blood then takes the oxygen molecules through out the body, so now those molecules are spread through out the body.
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Answer:
Through mRNA
Explanation:
DNA is the genetic material of most living cells and it holds the information needed for the synthesis of functional products (proteins). This information is embedded in the nuceleotide sequence of the DNA and it needs to be expressed through the processes of transcription and translation. The process of transcription occurs in the nucleus of eukaryotes where the genetic material (DNA) is located.
Transcription involves the copying of the information contained in the DNA into a carrier molecule known as messenger RNA. The messenger RNA (mRNA) is not used for long term storage unlike the DNA, it helps convey the information in the sequence out of the nucleus into the cytoplasm, where it attaches to Ribosomes (site of protein synthesis) for translation to occur. The mRNA contains complementary nucleotide sequence of the DNA.
