Question

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Tissue cultures (samples of cancer cells) are taken from cancer patients, and the cells are then grown in a laboratory. What is the purpose of growing cancer cells in a laboratory?
to test medicinal treatments before giving them to patients
to replace cancer cells with healthy cells
to provide evidence of cancer cells in the patient
to stop the cancer from growing in the patient

Answer 1

to test medicinal treatments before giving them to patients

Growing cancer cells in the lab lets researchers test drugs and study tumor behavior (chemosensitivity and biology) before applying treatments to patients.