Question

Quiz 10 1. (2 points) Which of the following conditions would lead to the highest levels of lac operon expression? a) High lactose, high glucose b) High lactose, low glucose c) Low lactose, high glucose d) Low lactose, low glucose e) None of the above would have any lac operon expression 2. (2 points) Which of the following is true concerning molecular genetics? a) tRNA carries amino acids into the nucleus in eukaryotic cells b) DNA polymerase moves towards the replication fork on the leading strand c) Promoters serve as the start site for translation d) Only the poly A tail functions to help the mRNA resist destruction by nucleases e) Introns are added to mRNA after it is translated by ribosomes 3. (3 points) What is the role of prokaryotic sigma factors during gene expression? Be specific. Your answer must include the names of any protein or genetic element that transcription factors bind to. 4. (3 points) Imagine that you develop a new drug that effectively demethylates DNA. What would be the effect of applying your drug to a population of eukaryotic cells and why?

Answer 1

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