Quiz of Lectures 22, 23, 24, 25, 26

Question 1

Which of the following is part of the energy transduction from solar energy to chemical energy?
A. Binding of chlorophyll to ATP
B. Photons breaking glucose bonds
C. CO2 being used to power ATP synthase proteins
D. An electrochemical proton gradient.

Answer 1

D. an electrochemical proton gradient

Question 2

The transfer of energy directly from a photoexcited electron in a pigment molecule to another electron in an adjacent pigment molecule occurs by
A. photochemical oxidation
B. photochemical reduction
C. photophosphorylation.
D. resonance energy transfer.

Answer 2

D. resonance energy transfer

Question 3

Your house plant is growing slowly and lacks its normal bright green color, so you call a botanist for advice. She suggests that the plant may be deficient in magnesium (Mg2+). Why are these symptoms associated with Mg2+ deficiency?
A. Mg2+ is important in the structure of many amino acids.
B. Mg2+ is a cofactor for NADPH function.
C. Mg2+ is an important component in chlorophyll.
D. Cytochromes require Mg2+ to function properly.

Answer 3

C. Mg2+ is an important component in chlorophyll

Question 4

Which process is NOT used by human cells?
A. Electron transport system (ETS)
B. Establishment of H+ gradients across membranes
C. ATP synthesis using membrane-bound proteins
D. Atmospheric carbon assimilation into glucose

Answer 4

D. atmospheric carbon assimilation into glucose

Question 5

The P680 chlorophyll in Photosystem II
A. Absorbs potentially damaging UV rays
B. Donates electrons to acceptor molecules
C. Reflects green wavelengths to maximize energy
D. Harvests CO2 from the air

Answer 5

B. donates electrons to acceptor molecules

Question 6

In eukaryotes, glucose is converted into pyruvate
A. in the cellular cytoplasm.
B. during passage through the mitochondrial outer membrane.
C. in the intermembrane space.
D. during passage through the inner mitochondrial membrane.

Answer 6

A. in the cellular cytoplasm

Question 7

When electrons flow through the mitochondrial ETS what is the sequence of molecules through which they move?
A. complex I, cytochrome c, complex III, coenzyme Q, complex IV, O2
B. complex I, coenzyme Q, complex III, complex IV, O2
C. complex I, coenzyme Q, complex IV, cytochrome c, O2
D. complex I, coenzyme Q, complex III, cytochrome c, complex IV, O2

Answer 7

D. Complex 1, coenzyme Q, complex III, cytochrome c, complex IV, O2

Question 8

Which of the following carrier molecules has a heme prosthetic group?
A. flavoproteins
B. iron-sulfur proteins
C. cytochromes
D. copper-containing proteins

Answer 8

C. cytochromes

Question 9

The terminal electron acceptor in the mitochondrial ETS is
A. O2
B. Proton
C. NAD+
D. CO2

Answer 9

A. O2

Question 10

The main contribution of the Citric Acid Cycle to allow high-throughput production of ATP is
A. Production of glucose from lactose
B. Splitting of glucose into pyruvate
C. Generation of many free electrons
D. Removal of H+ ions to create a proton deficit

Answer 10

C. generation of many free electrons