Arrange the following electron carriers in the electron transport chain, based o

Question

Arrange the following electron carriers in the electron transport chain, based on their standard reduction potentials.

Cytochrome a3 (Fe3+) + e- Cytochrome a3 (Fe2+)   Eo (volts) = 0.35

Ubiquinone + 2H+ + 2e- Ubiquinone H2                     Eo (volts) = 0.10

Cytochrome a (Fe3+) + e- Cytochrome a (Fe2+)    Eo (volts) = 0.29

Cytochrome c (Fe3+) + e- Cytochrome c (Fe2+)    Eo (volts) = 0.25

cytochrome c - ubiquinone - cytochrome a - cytochrome a3

The binding of a positive allosteric regulator molecule will

decrease the ability of the substrate to bind to the catalytic site.

In bacterial synthesis of polysaccharides, such as starch and glycogen, glucose is donated to the end of the growing chain by ADP-glucose. A similar reaction occurs in bacterial branching of phospholipids when phosphatidic acid is attached to a _____

Explanation / Answer

1. Electron carrier are arranged in their increasing order of negetive value of reduction potential. Hence A is correct.

2. Binding of positive control regulator increases binding of substrate to active site and increase activity of enzyme. Option C is correct.

3. Phosphatidate is key intermediate in biosynthesis of trglyceride by reacting with fallty acyl-CoA. Hence option A is correct.

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