Answer/Explanation:
DNA and messenger RNA (mRNA) are different in a variety of ways that impact their function in the cell. One way in which they are different is their location. DNA is found in the nucleus of the cell, whereas mRNA is produced in the nucleus, but moves to the cytoplasm.
They are also different in terms of their structure. The mRNA molecule is single-stranded, whereas DNA is double stranded, forming a helix. Their composition is also slightly different, DNA uses the nucleotides adenine, thymine, cytosine and guanine, whereas RNA uses uracil in place of thymine.
Finally, they differ in their function. The function of DNA is to hold the genetic information and transmit it to future generations. The function of mRNA is to transcribe the information encoded in DNA and pass it to the protein synthesis machinery, where mRNA is translated to proteins.
Glycolysis, the Krebs cycle and oxidative phosphorylation are the pathways of cellular respiration.
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Pathway of cellular respiration</h3>
Glycolysis, the link reaction, the Krebs cycle and oxidative phosphorylation are the stages of glucose oxidation. Complete oxidation of one molecule of glucose results in the production of 38 molecules of ATP.
This process also results in the production of 38 molecules of water because the formation of phosphodiester bond between ADP and inorganic phosphate involves the splitting off of a molecule of water so we can conclude that glycolysis, the Krebs cycle and oxidative phosphorylation are the pathways of cellular respiration.
Learn more about respiration here: brainly.com/question/18169685
Heroin
Heroin has the chemical formula

and has the chemical name (IUPAC), <span>(5α,6α)-7,8-didehydro-4,5-epoxy-17-methylmorphinan-3,6-diol diacetate.
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Heroin is also <span>known as </span>diamorphine. It can be produced from morphine reacting with a powerful acetic anhydride, or it can be obtained naturally from seed pods of certain opium poppy plants. Heroin is commonly used as a recreational drug as it induces euphoric effects. Medically, it can be used to relieve pain or used in an opioid replacement therapy.