This is the first one. Sorry I couldn’t do the other ones, because I’m in class... yikes
Answer: mitochondrion
explanation: The enzymatic reactions of cellular respiration begin in the cytoplasm, but most of the reactions occur in the mitochondria. Cellular respiration occurs in the double-membrane organelle called the mitochondrion. The folds in the inner membrane are called cristae.
1 H2SO4 + 2 NaNO2 ---> 2 HNO2 + 1 Na2SO4
Either the duodenum or the jejunum
One of the best examples would be Archaea