Kalabamboo
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Can somebody help me understand how to understand the ms answer to this question:I feel like OCR mark schemes are quite confusing
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Kalabamboo
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InfiniteWill
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You just need to get your textbook and mark scheme and using the textbook, write an answer including the keywords in the mark scheme
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Purplebottle
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Biology in general has terrible mark schemes
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ningamaniac
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you should post the whole question

but I wouldn't worry too much as it's a suggest question- any reasonable explanation would do


my guess is that the DNA is there because it codes for specific proteins and/or enzymes that are specific to the functioning of the mitochondrion (dehydrogenase or cytochrome oxidase enzymes)

As there are many mitochondrion in the cell it would seem appropriate that they have their own DNA and ribosomes to make their own proteins and/or enzymes rather than receiving proteins and/or enzymes from the cytoplasmic ribosomes (due to nucleus)


also you could perhaps suggest an evolutionary perspective - ie mitochondrion were bacteria that crawled into cells (forming a mutualistic relationship) and their DNA remained


https://www.quora.com/Why-do-mitocho...-their-own-DNA <------------- might help- all are very good answers to this suggest Q
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