9Which of the following molecules is involved in DNA mismatch repair?(A) RecBCD (B) MutH (C) UvrC (D) Spo11

11. Which description is false?(A) X-rays are hazardous because they cause DNA double-strand breaks, which are hard to repair.(B) an A to.G mutation is called a point mutation.(C) Human cells are used in the Ames test to determine the carcinogenic effects of chemicals.(D) Non-homologous end joining usually results in DNA mutations.