6Which of the following is not a "stop codon" ?(A) UAA (B) UGG(C) UGA (D) UAG

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.