Question

Fill in the missing reagents in the following reaction.

1) reactant: nad h ; product: nadh
2) reactant: nadh h ; product: nad
3) reactant: atp; product: adp pi
4) reactant: nadh h ; product: co
5) none of the above

Answer 1

In biochemical reactions: 1) NAD+ is reduced to NADH by gaining electrons and protons from a substrate. 2) NADH is oxidized back to NAD+ in the electron transport chain. 3) ATP hydrolysis to ADP and Pi releases energy. 4) NADH oxidation indirectly leads to CO2 production in the Krebs cycle.

Step-by-step explanation:

The subject of this question falls under the category of Biology, specifically related to biochemistry and cellular respiration. The question pertains to the role of various biochemical compounds such as NADH, ATP, and coenzymes in metabolic pathways.

For each reaction stated in the question, the missing reagents are as follows:

1. The reaction where NADH is produced from NAD+ requires a substrate that donates electrons and protons (H+), such as what happens in the Krebs cycle or glycolysis.
2. The reaction where NAD+ is produced from NADH typically occurs in the electron transport chain, where NADH donates the electrons and protons to the chain, regenerating NAD+.
3. For the conversion of ATP to ADP and Pi (inorganic phosphate), the process is called hydrolysis, which is exergonic and releases energy for cellular activities.
4. The production of CO2 from NADH doesn't typically occur directly. However, NADH is oxidized during the electron transport chain, which indirectly leads to the production of CO2 during the Krebs cycle.