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 |
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is produced in
1. | glycolysis | 2. | the oxidation of pyruvate |
3. | the Krebs cycle | 4. | the electron transport chain |
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Krebs cycle is also called as:
1. | glycolysis | 2. | fermentation |
3. | Calvin cycle | 4. | the citric acid cycle |
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A five carbon amino acid can be formed by which of the following intermediates of Krebs cycle?
1. | succinate | 2. | malate |
3. | citrate | 4. | α-ketoglutarate |
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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
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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 |
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Consider the steps of glycolysis given in the diagram:
Regarding reaction 3 in the diagram:
I: | The reaction is a key regulatory point and is also the rate-limiting step. |
II: | The reaction is freely reversible. |
1. Only I is true
2. Only II is true
3. Both I and II are true
4. Both I and II are false
What process in aerobic respiration generates maximum ATP?
1. | substrate-level phosphorylation | 2. | chemiosmosis |
3. | Krebs cycle | 4. | Pyruvate decarboxylation |
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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 |
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Oxidative decarboxylation of pyruvate produces:
1. | 2. Citrate |
3. Acetyl-CoA | 4. G3P |
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