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28. Epigenetic modulation can control gene expression without changing DNA
sequences. Please explain how this is achieved (5 points).
27. The two strands of DNA double helix can be separated by heating. If you raised the temperature of a solution containing the following three DNA molecules, in what order do you suppose they would "melt"? Explain your answer (10 points).
C. 5'-AGAGCTAGATCGAT-3'
3'-TCTCGATCTAGCTA-5'
B. 5'-ATTATAAAATATTTAGATACTATATTTACAA-3'
3'-TAATATTTTATAAATCTATGATATAAATGTT-5'
20. Which of the following is a stop codon?
(A)AUG
(B)UGG
(C)GAG
(D)CGA
(E)UAG
19. Which of the following RNA may block translation of targeted proteins?
(A)miRNA
(B)mRNA
(C)siRNA
(D)Inc RNA
(E)dsRNA
18. Which of the following pairs of codons might you expect to be read by the same tRNA as a result of wobble?
(A)CUU and UUU
(B)GAU and GAA
(C)CAC and CAU
(D)AAU and AGU
(E)UAG and UAA
This is a large modal.
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