Question

which group of organelles is directly responsible for the production of new molecules within a cell?
options: the endoplasmic reticulum, the ribosomes, the nucleolus, golgi apparatus

Explanation:

To determine the organelle responsible for new molecule production (specifically proteins, a key new molecule in cells), we analyze each option:

• Endoplasmic reticulum (ER): Involved in protein and lipid synthesis/transport, but not the direct site of protein synthesis.
• Ribosomes: Directly synthesize proteins (new molecules) by translating mRNA into polypeptide chains.
• Nucleolus: Produces ribosomal RNA (rRNA) and assembles ribosomal subunits, not direct molecule production.
• Golgi apparatus: Modifies, sorts, and packages molecules (e.g., proteins from ER), not direct production.

Answer:

The ribosomes (the checkbox next to "The ribosomes" should be selected).