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Unformatted text preview: caused by this will be (a) AT to CG (b) GC to AT (c) AT to TA (d) AT to GC 1 (e) GC to CG 5. Fragile X syndrome is caused by (a) Extension of trinucleotide repeats (b) 5-Bromouracil (c) Free radicals (d) Depurination (e) Microdeletions 6. During mutagenic treatment with nitrous acid, an adenine deaminates to form hypoxanthine, which behaves like guanine in base-pairing. The mutational event would be (a) AT to CG (b) AT to GC (c) AT to TA (d) GC to AT (e) GC to TA 7. Which of the following mutations will result in cancer? (a) A homozygous recessive mutation in which there is a deletion in the coding region of a proto-oncogene, leaving it non-functional. (b) Homozygous recessive point mutations in a tumor-suppressor gene coding for a non-functional protein. (c) A dominant mutation in a proto-oncogene in which the protein product is overexpressed. (d) A dominant mutation in a tumor-suppressor gene in which the protein product is overexpressed. 2...
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This note was uploaded on 12/30/2009 for the course BIO 325 taught by Professor Saxena during the Spring '08 term at University of Texas at Austin.
- Spring '08