Which of th following is needed for cellular respiration to occur

The molecule necessary for respiration to occur in both plants and animals is NADH or Nicotinamide Adenine Dinucleotide Hydride. This compound is necessary for cellular development and energy production: It's crucial to produce energy from the food one consumes. It's also the principal carrier of electrons in the energy-producing process in the cells.

OR

Cellular respiration requires energy from an organic source (ie - glucose and oxygen). Without these, the reactions cannot take place. Oxygen is also needed. It acts as the final electron acceptor in electron transport.