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Because the oxygen produced in photosynthesis is used in respiration, and the carbon dioxide produced in respiration is used in photosynthesis.
Answer:
Ribosomes are found 'free' in the cytoplasm or bound to the endoplasmic reticulum (ER) to form rough ER. In a mammalian cell there can be as many as 10 million ribosomes. Several ribosomes can be attached to the same mRNA strand, this structure is called a polysome.
Explanation:
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Answer:
There is alternate splicing of the runner mRNA.