Redox Reactions

Q.

Ferredoxin is a constituent of

1. Hills reaction

2. PS II

3. PS I

4. P₆₈₀

Q. Which among the following statements is correct about nicotinamide adenine dinucleotide?

1. ${\mathrm{NAD}}^{+}$, an oxidizing agent, can accept electrons and protons from organic molecules and get reduced to $\mathrm{NADH}$
2. ${\mathrm{NAD}}^{+}$, a reducing agent, can donate its electrons and protons to organic molecules
3. ${\mathrm{NAD}}^{+}$, an oxidizing agent, can accept electrons from organic molecules and get reduced to ${\mathrm{NADH}}_2$
4. ${\mathrm{NAD}}^{+}$, a reducing agent, can donate its electrons and protons to inorganic molecules

Q. How many redox equivalents are removed from one molecule of
3-phosphoglyceraldehyde during glycolysis?

1. 1
2. 2
3. 3
4. 4

Q. Redox reaction in living organisms involves gain and loss of

1. carbon atoms
2. nitrogen atoms
3. hydrogen atoms
4. 1. oxygen atoms