Question

In the electron transport chain, ______ are membrane-bound electron carriers?

a. Flavoproteins
b. Cytochromes
c. Carbon atoms
d. Ubiquinone
e. Iron-sulfur proteins

(1) a, b, c and e
(2) a, b, d and e
(3) a, b and c
(4) b, c, d and e
(5) all of above

Answer 1

In the electron transport chain, membrane-bound electron carriers include flavoproteins, cytochromes, iron-sulfur proteins, and ubiquinone.

Step-by-step explanation:

In the electron transport chain, the membrane-bound electron carriers are flavoproteins, cytochromes, iron-sulfur proteins, and ubiquinone. Flavoproteins include flavin mononucleotide (FMN) and flavin adenine dinucleotide (FAD). Cytochrome c is a water-soluble protein that shuttles electrons between complex III and complex IV. Iron-sulfur proteins, such as iron-sulfur clusters, participate in redox reactions. Ubiquinone (coenzyme-Q) is a lipid-soluble molecule that moves freely within the inner mitochondrial membrane.