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Both chloroplast and mitochondria are thought to be endosymbiotic and have their own DNA. The fact that these enzymes in all species is a theory of conserving useful gene. "If it isn't broke, don't fix it". These are also called essential genes.

Essential genes code for fundamental cellular functions required for the viability of an organism. For this reason, essential genes are often highly conserved across organisms.

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Why are enzymes used in cellular respiration identical in all species?

The same genetic code produces those enzymes


Why are the enzymes used in cellular respiration virtually identical in all species?

Enzymes used in cellular respiration are highly conserved across species because they carry out essential functions in the process of converting energy from food into a usable form for cells. Evolutionarily, these enzymes have been refined to be efficient and effective in carrying out these critical functions, resulting in their similarity across species. This conservation reflects the fundamental importance of cellular respiration for life.


Why are the enzymes used in cellular respiration virtually identical in all speccies?

Enzymes used in cellular respiration are highly conserved across species because they perform essential functions in a complex process that has been evolutionarily optimized for efficiency. Any changes to these enzymes could disrupt the finely tuned metabolic pathways, affecting the organism's ability to generate energy effectively. Therefore, these enzymes have remained similar across species to ensure the proper functioning of cellular respiration.


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Because Enzymes are catalyst for reactions in species. Eg. There are digestive enzymes in your mouth to start off digesting.


What two enzymes are present in obligate aerobes but lacking in obligate anaerobes?

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When comparing cytochrome sequences among species what species is identical to humans?

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Do all enzymes function identically in all species?

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