Biological oxidation. The respiratory chain. Structure and functions of dehydrogenases. Oxidative phosphorylation. Microsomal cytochrome P450 monooxygenase system.

Variant 2

1. Which enzyme does transfer electrons directly to oxygen:

a) cytochrome aa₃c) cytochrome b

b) cytochrome c d) NADH dehydrogenase

2. The terminal acceptor of electrons in aerobic respiration is:

a) ATP c) cytochrome aa₃ e) O₂

b) CoQ d) NADH f) cytochrome P₄₅₀

3. Choose the enzyme which can be inhibited by cyanide:

a) cytochrome aa₃ c) cytochrome c e) FAD dehydrogenase

b) cytochrome b d) NAD dehydrogenase

4. What substance is synthesized by the electron transport system which requires the presence of an electrochemical gradient of protons across the inner mitochondrial membrane?

a) cytochrome aa₃c) ATP f) CoQ

b) O₂d) CO₂

5. Monooxygenases incorporate into the substrate:

a) ATP

b) CO₂

c) both atoms of molecular O₂

d) one atom of molecular O₂

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