27. Coenzyme Q is involved in electron transport __________.(A) directly to O2 (B) as a lipid-soluble electron carrier (C) as a water-soluble electron donor (D) as a covalently attached cytochrome cofactor (E) as a water-soluble electron acceptor

6. Planarity of the peptide bond means that rotation is allowed about the bond linking ___________the and the carbon of the peptide bond, and also about the bond linking the___________ to the adjacent α-carbon. (A) a-carbon, carbony1 carbon (B) B-carbon, carbonyl carbon (C) carbonyl carbon, nitrogen of the peptide bond (D) a-carbon, nitrogen of the peptide bond (E) none are true

27. Coenzyme Q is involved in electron transport __________.
(A) directly to O₂
(B) as a lipid-soluble electron carrier
(C) as a water-soluble electron donor
(D) as a covalently attached cytochrome cofactor
(E) as a water-soluble electron acceptor

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