BIOLOGY 130 CHAPTER 16 STUDY QUESTIONS

BIOLOGY 130 CHAPTER 16 STUDY QUESTIONS Question 1 of 10 0.33/ 1.0 Points If every cell in the body gets the same DNA, how do the cells of an embryo make different structures and take on different roles? (Select all that apply.) A. Different transcription factors are active in different cells. B. Different transcription factors are encoded in the DNA. C. Genes are spliced differently in different cells. D. Translation is regulated so that different cells may make more of certain proteins. E. Some cells lack ribosomes while others use them. F. Cells delete a set of unused genes from their chromosomes. Feedback: Learning Objective Text: Analyze the processes of gene expression and gene regulation Question 2 of 10 1.0/ 1.0 Points A gene is made up of three exons (numbered consecutively) with two introns (intron 1 between exons 1 and 2 and intron 2 between exons 2 and 3). What would happen if there were a mutation at the 3’ splice site of intron 1? A. mRNA with all three exons and both introns B. mRNA with all three exons along with intron 1 C. mRNA with only exons 2 and 3 D. mRNA with exons 2 and 3 along with intron 2 Feedback: Correct Question 3 of 10 1.0/ 1.0 Points What would happen if there were a mutation in the operator of the trp operon? A. the trp operon would not be able to express the genes B. the CAP protein couldn't bind, therefore shutting off the genes C. the trp operon would continuously express the genes D. RNA polymerase could not recognize the promoter, so transcription would not occur Feedback: Correct Question 4 of 10 1.0/ 1.0 Points Overexpression of miRNAs can lead to a decrease of protein expression associated with some forms of cancer. What could a drug do to counter this effect? A. increase promoter activity of the miRNA genes B. decrease expression of RNA polymerase C. increase expression of RISC