Which of the Following is a Non-Protein Carrier Found in Some

Question

Which of the following is a non-protein carrier found in some electron transport chains?
A) flavoproteins
B) metal-containing proteins
C) ribozymes
D) cytochromes
E) ubiquinones

Accepted Answer

Ubiquinones (also known as coenzyme Q) are non-protein carriers found in some electron transport chains. They are lipid-soluble molecules that can move freely within the inner membrane of the mitochondria or bacterial cell membrane, shuttling electrons between complex I or II and complex III.