What cellular process is occurring in the organelle labeled B?

B. Cellular respiration

Explanation:

The cellular process that is occurring in the organelle labeled B is "Cellular respiration".

From the image, the organelle B is Mitochondria. Cellular respiration takes in the mitochondria and this is important because it leads in the production of ATP using the chemical energy that is found in glucose and other nutrients.

Mitochondria are known to be membrane-bound organelles. Their function is to generate most of the chemical energy that the cell needs for biochemical reactions.

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1. amino acid refers to the fundamental building block of proteins, comprising of an amino group and a carboxyl group.

2. catalyst refers to any substance, which increases the rate of chemical reaction without being used up in the reaction.

3. a complex molecule containing he genetic code is dna or deoxyribonucleic acid.

4. an enzyme refers to a molecule of protein, which is unique in accelerating up a particular chemical reaction in the biological systems.

5. nucleic acid refers to an sequence of sugars, phosphates, and nitrogenous bases, for example, dna and rna.

6. a protein refers to a large, composite organic molecule comprising of a huge number of amino acids associated together with the of peptide bonds.

7. rna refers to a nucleic acid that takes part in the production of proteins.

8. substrate refers to a compound, which takes part in a chemical reaction, and is chemically modified by the reaction.