The electron transport chain contains four large protein complexes: the nadh-q reductase complex, succinate dehydrogenase, the cytochrome c reductase complex, and the cytochrome c oxidase complex. these proteins

a. are integral proteins.
b. change in a similar way when reduced.
c. regulate the passage of h2o through the respiratory chain.
d. oxidize nadh.
e. complete oxidation of pyruvate to acetate.

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The main role of dna in the  cell is the long-term storage of information. it is often compared to a blueprint, since it contains the instructions to construct other components of the  cell, such as  proteins  and rna molecules.the main function of rna is to carry information of amino acid sequence from the genes to where  proteins  are assembled on  ribosomes  in the  cytoplasm. mark brainliest, my work is good.