11. (four marks) Two DNA primers are shown below 3'CCGTS SATCG3 With which of the following strands of DNA could these primers be successfully used in the polymerase chain reaction? 1. S'ATCGATTGGGCTTGGCA3 2. S'ACGGTTOGGGTTAGCTA3 3. 3TAGCTAACCOGAACCGTS 4. 3TGCCAAGCCCAATOGATS 1 a 1 and 2 b. 1 and 3 c. 2 and 4 d. 3 and 4 e 1 and 4 S81401 Lesson Assignment Page 3 12. (two marks) During the polymerase chain reaction, heat is used to a break hydrogen bonds b. break covalent bonds c. accelerate chemical processes danncal DNA primers to single-stranded DNA e. allow the synthesis of new DNA strands in the 5 to 3' direction from the primers 1 sovo marks. Which of the following diseases can be detected using peenatal genetic screening? a scarlet fever b. typhoid pocumonia d. Duchenne's muscular dystrophy c. influenza