Bioenergy Flashcards
Which of the following is the correct sequence of electron acceptors in ETS for production of ATP?
(a) Cyt b, c, a, a3
(b) Cyt a, a, b, c
(c) Cyt c, b, a, a3
(d) Cyt b, c, a3, a
a
Which of the following terminal cytochromes is responsible for donating electrons to oxygen?
(a) Cyt a3
(b) Cyt b
(c) Cyt c
(d) Cyt a1
a
Electron transport system (ETS) is present in which of the following parts of mitochondria?
(a) Inner membrane
(b) Outer membrane
(c) Matrix
(d) Stroma
a
Which of the following is the first complex (Complex I) of ETS?
(a) NADH dehydrogenase
(b) Cytochrome aa3
(c) Cytochrome bc1
(d) ATP synthase
c
Ubiquinone transfers its electrons to
(a) Complex I
(b) Complex II
(c) matrix
(d) Cyt c
d
In which part of the cell, oxidative phosphorylation takes place?
(a) Inner mitochondrial membrane
(b) Outer mitochondrial membrane
(c) Grana of chloroplast
(d) Stroma of chloroplast
a
Cytochromes are present in
(a) lysosomes
(b) mitochondrial matrix
(c) cristae of mitochondria
(d) outer membrane of mitochondria
c
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ATP synthesis by ATP synthase is driven by the movement of
(a) protons
(b) NADH
(c) electrons
(d) All of the above
a
protons H+
Oxidative phosphorylation results in the formation of
(a) Oxygen
(b) ADP
(c) ATP + H2O
(d) NADH
c
Which of the following complexes of ETS does not account for the pumping out of protons from the mitochondrial matrix?
(a) Complex I
(b) Complex III
(c) Complex II
(d) Complex IV
c
succinate-coQ reductase
Which of the following is the Complex IV of ETS?
(a) NADH dehydrogenase
(b) Cytochrome c oxidase
(c) Cytochrome bc1
(d) Succinate dehydrogenase
b
cytc aa3
Which of the following is the Complex II of ETS?
(a) NADH dehydrogenase
(b) Succinate dehydrogenase
(c) Cytochrome bc1
(d) ATP synthase
b
Succinate dehydrogenase (SDH) or succinate-coenzyme Q reductase (SQR) or respiratory complex II
Which of the following products of glucose oxidation are necessary for oxidative phosphorylation?
(a) Pyruvate
(b) NADH and FADH2
(c) Acetyl CoA
(d) NADPH and ATP
b
Which of the following is true for cytochrome c oxidase complex?
(a) It donates electrons to O2
(b) It accepts electrons from Cyt c
(c) It pumps two protons out of the mitochondrial matrix
(d) All of the above
d