Ubiquinone receives reducing equivalents via:

I. Complex I II. Complex II III. Complex III
 
1. Only I 2. Only I and II
3. Only I and III 4. I, II and III
Subtopic:  ETS:2 | ETS:1 | ETS |
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Cytochrome c is found:
1. attached to outer surface of the inner mitochondrial membrane
2. attached to inner surface of the inner mitochondrial membrane
3. in the inter membrane space
4. in the mitochondrial matrix

Subtopic:  ETS:2 | ETS:1 | ETS |
 71%
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The number of ATP molecules synthesized from oxidation of one molecule of NADH and one molecule of FADH2 are respectively:

1. 3 and 2 2. 2 and 3
3. 1 and 1 4. 2 and 1
Subtopic:  ETS:2 | ETS:1 | ETS |
 92%
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The stage of cellular respiration that directly involves oxygen is:

1. glycolysis
2. at the end of ETC
3. Krebs cycle
4. the phosphorylation of ADP to form ATP
Subtopic:  ETS |
 81%
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Given below is the schematic representation of the electron transport chain in mitochondria. Identify the correct statement:

1. (1) is NADH; 4 is FAD; 6 is fumarate; 8 is oxygen and 10 is ATP
2. (2) is NAD+ ; 4 is FADH2; 6 is succinate; 8 is oxygen and 10 is ADP
3. (1) is NADH; 4 is Fumarate; 6 is FAD; 8 is water and 10 is ATP
4. (2) is NAD+; 3 is succinate; 6 is FAD; 8 is oxygen and 10 is ADP
Subtopic:  ETS |
 54%

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In aerobic respiration, oxygen acts as:
I. Terminal electron acceptor
II. Terminal proton acceptor

1. Only I 2. Only II
3. Both I and II 4. Neither I nor II
Subtopic:  ETS |
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The components of the mitochondrial electron transport chain are located:
1. in mitochondrial matrix
2. in outer mitochondrial membrane
3. in inner mitochondrial membrane
4. in intermembrane space

Subtopic:  ETS |
 95%
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The correct sequence of flow of electrons downhill in the mitochondrial electron transport chain would be:
1. ubiquinone, cytochromes, FMN, Fe-S
2. cytochromes, FMN, ubiquinone, Fe-S
3. Fe-S, FMN, cytochromes, ubiquinone
4. FMN, Fe-S, ubiquinone, cytochromes

Subtopic:  ETS |
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Identify the incorrectly matched pair:

Component of ETC Name
1. Complex I NADH dehydrogenase
2. Complex II Succinate dehydrogenase
3. Complex III Cytochrome b6f complex
4. Complex IV Cytochrome c oxidase
Subtopic:  ETS |
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What acts as the terminal electron acceptor when glucose is completely oxidised inside a cell in the presence of oxygen?
1. Hydrogen sulphide 2. Water
3. Oxygen 4. Pyruvic acid
Subtopic:  ETS |
 87%
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