When an electron is shifted to a more electronegative atom, its potential energy:

1. increases 2. decreases
3. remains same 4. can increase or decrease
Subtopic:  ETS |
 60%

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The correct sequence of electron flow during aerobic respiration would be:
1. food → Krebs cycle → ATP → NAD+
2. food → NADH → electron transport chain → oxygen
3. glucose → pyruvate → ATP → oxygen
4. glucose → ATP → electron transport chain → NADH

Subtopic:  ETS |
 52%

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Electron is donated to the mitochondrial ETC at the lowest energy level by:

1. Glucose 2. NADH
3. ATP 4. FADH2
Subtopic:  ETS |

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When electron pass downhill in the ETC, the energy released is used to pump protons into:
1. matrix of mitochondria
2. cytosol
3. mitochondrial inner membrane
4. mitochondrial intermembrane space

Subtopic:  ETS |
 54%

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ATP synthesis during oxidative phosphorylation in mitochondria is directly driven by:
1. oxidation of glucose.
2. electron transport downhill in the ETC.
3. terminal transfer of electrons to oxygen.
4. chemiosmosis.

Subtopic:  ETS |
From NCERT

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ATP synthase is located in the mitochondrial:

1. matrix 2. electron transport chain
3. outer membrane 4. inner membrane
Subtopic:  ETS |
 66%
From NCERT

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Chemiosmosis is coupled to energy storage by:

1. NADH 2. ADP
3. cytochromes 4. ATP synthase
Subtopic:  ETS |
 69%

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Ubiquinone is:
1. a protein in the mitochondrial electron transport chain
2. a substrate for synthesis of FADH
3. a vitamin used as coenzyme in Krebs cycle
4. a small hydrophobic coenzyme

Subtopic:  ETS |

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All the following will normally occur during the electron flow in ETS in mitochondria except:
1. NADH and FADH2 are oxidized.
2. the pH of the matrix decreases.
3. the electrons lose free energy.
4. an electrochemical gradient is formed.

Subtopic:  ETS |
 59%

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Direct use of oxygen is in:

1. Glycolysis 2. Fermentation
3. Krebs cycle 4. Electron transport
Subtopic:  ETS |
 81%
From NCERT

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