Which of the following statements about cytochrome c is true?
(a) Cytochrome c shuttles electrons between the NADH dehydrogenase complex and cytochrome c reductase complex.
(b) When cytochrome c becomes reduced, two cysteines (sulfur-containing amino acids) become covalently bound to a heme group.
(c) The pair of electrons accepted by cytochrome c are added to the porphyrin ring of the bound heme group.
(d) Cytochrome c is the last protein in the electron-transport chain, passing its electrons directly to molecular oxygen, a process that reduces O2 to H2O.
(c)
You might also like to view...
The leaves of ginkgo trees have:
A. unbranched veins B. forked veins C. multiply branching veins D. veins in a netlike pattern E. veins only around the edges
Long-term exposure to cold can alter metabolism and encourage __________ in which brown adipose
tissue produces heat. Fill in the blank(s) with the appropriate word(s).
The sympathetic nervous system:a
is involved in restoring energy to the body. b. directs quiet, calm activities. c. is the only system that innervates the heart. d. is activated when there is a startling situation. e. is part of the somatic division.
The Trichinella worm, which causes trichinosis, is classified as a(n) ________
Fill in the blank(s) with correct word