Question

scientists use tissue cultures to study possible medicines that can be used to treat cancer patients. what is one benefit of this procedure?
patients do not receive harmful or ineffective medication.
the cultured cells are not in their normal environment.
doctors know how to treat all types of cancer.
one tissue culture can be used for all cancer patients.

Explanation:

• Option 1: Tissue cultures allow testing of medicines on cells first. If a medicine is harmful or ineffective on the cultured cells, it won't be given to patients. This protects patients from potential harm.
• Option 2: The fact that cultured cells are not in their normal environment is a limitation (as it may not fully mimic in - vivo conditions), not a benefit.
• Option 3: There is no such thing as knowing how to treat all types of cancer. Cancer is complex, and new research is constantly needed.
• Option 4: Different cancer patients have different types of cancers (with different genetic and cellular characteristics). One tissue culture cannot be used for all cancer patients.

Answer:

Patients do not receive harmful or ineffective medication.