Which statement describes organoids most accurately?

• A. Organoids are genetic sequences used to modify cells
• B. Organoids are mini organs grown from stem cells for studying diseases or testing treatments
• C. Organoids are live animals used in organ replacement
• D. Organoids are synthetic organs created from plastics

Answer: (D)

Organoids are three‑dimensional, lab-grown structures that resemble real organs in their organization and some functions. They come from stem cells—either pluripotent or organ-specific stem cells—that differentiate and self‑organize into miniaturized versions of tissues such as intestine, brain, or liver. Because they capture key features of an organ’s architecture and behavior, organoids are especially useful for studying how diseases develop and for testing how treatments might work, all without using whole animals or humans. The statement that best fits this idea is that organoids are mini organs grown from stem cells for studying diseases or testing treatments. They’re not genetic sequences used to modify cells, not live animals used in organ replacement, and not synthetic organs made from plastics, which is why those descriptions don’t apply.