Answer:
The location in the cell where the first step of cellular respiration occurs is 2, i.e., a mitochondria. The correct option is B.
What is mitochondria?
The majority of the chemical energy required to drive a cell's metabolic operations is produced by mitochondria, which are membrane-bound cell organelles (mitochondrion, singular).
Adenosine triphosphate, a tiny molecule, serves as a storage container for the chemical energy generated by the mitochondria (ATP).
Because they assist in cellular respiration, the process by which energy is extracted from food, mitochondria are known as the powerhouse of the cell or energy manufacturers.
The first stage of cellular respiration, known as glycolysis, takes place in the cytoplasm of the mitochondria.
To produce cellular energy, the six-carbon sugar molecule of glucose is broken down into three-carbon molecules during the process known as glycolysis.
Thus, the correct option is B.