The physical need to eat food is called hunger
The answer is D. NADH to NAD+
When no oxygen is present, anaerobic respiration occurs.It is the only way to produce ATP in this condition.NAD+ is necessary because it is converted into NADH and at the same time ADP is converted to ATP in the reaction of pyruvate synthesis from glucose.Therefore, NADH must be converted to NAD+ in order to have NAD+ always present in the cell.
1-DNA contains the sugar deoxyribose, while RNA contains the sugar ribose.
2-DNA is a double-stranded molecule, while RNA is a single-stranded molecule.
3-DNA is stable under alkaline conditions, while RNA is not stable.
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