Question

question 1 of 20 : select the best answer for the question. 1. a gene editing technology called crispr-cas9 uses cellular machinery to change the cell’s genetic material. how might this technology be useful in treating diseases like cancer?
a. crispr-cas9 could be a substitute for chemotherapy.

b. crispr-cas9 could remove from patients the genetic mutations that cause a specific cancer before the cancer begins.

c. crispr-cas9 could act as an antioxidant in a person’s cells, removing toxins that might otherwise damage dna.

d. crispr-cas9 could remove any dna damage caused by smoking.

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Explanation:

• Option A: CRISPR - Cas9 and chemotherapy have different mechanisms; CRISPR edits genes, chemotherapy targets rapidly dividing cells, so it can't substitute chemotherapy.
• Option B: CRISPR - Cas9 can edit genes. If a specific cancer is caused by genetic mutations, CRISPR - Cas9 could potentially remove those mutations before cancer starts, which is a valid use in cancer treatment.
• Option C: CRISPR - Cas9 is a gene - editing tool, not an antioxidant. Antioxidants work by neutralizing free radicals, while CRISPR edits DNA, so this is incorrect.
• Option D: CRISPR - Cas9 edits genes, not remove DNA damage caused by smoking. DNA damage from smoking is a different type of cellular injury, and CRISPR's function is gene editing, not DNA damage repair in this context.

Answer:

B. CRISPR - Cas9 could remove from patients the genetic mutations that cause a specific cancer before the cancer begins.