Final answer:
The process where carbon dioxide reacts to produce glucose takes place in the chloroplasts of plant cells during photosynthesis, not in the mitochondria, endoplasmic reticulum, or ribosomes. (option 2)
Step-by-step explanation:
The reaction in which carbon dioxide is a reactant and glucose is a product occurs in the chloroplast. This process is known as photosynthesis, a vital biochemical pathway exclusive to plant cells, algae, and some bacteria. Chloroplasts, specialized organelles within plant cells, facilitate photosynthesis. During this complex process, light energy is absorbed by chlorophyll, a pigment present in chloroplasts, and used to convert carbon dioxide and water into glucose and oxygen. The overall equation for photosynthesis is 6CO2 + 6H2O + light energy → C6H12O6 + 6O2. This transformative process not only provides energy for the plant but also contributes to oxygen production in the atmosphere. Neither the endoplasmic reticulum, mitochondria, nor ribosomes are directly involved in photosynthesis; these organelles play different roles in cellular functions such as protein synthesis and energy production.
The chloroplast is the specific organelle where the reaction involving carbon dioxide as a reactant and glucose as a product occurs, as part of the photosynthetic process in plant cells.