Modern Biology 2010 Exam 4 KEY - MODERN BIOLOGY FALL 2010...

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MODERN BIOLOGY Name______________________________ FALL 2010 EXAM 4 100 POINTS TOTAL Part 1- Multiple Choice (CIRCLE ONE ANSWER, 2 pts each) 1) Consider the genes inside a cell. At any particular time: a) either all the genes are “off” or all the genes are “on” b) some genes are “on” while other genes are “off”; any genes that are “off” cannot be turned “on” at a later time c) some genes are “on” while other genes are “off”; any genes that are “on” cannot be turned “off” at a later time d) some genes are “on” while other genes are “off”; both types of genes can change their expression (“on” to “off” or “off” to “on”) at a later time, if conditions change 2) In your own body, liver cells are different from nerve cells because: a) the two types of cells have different genes b) different gene mutations occur in the two cell types c) different genes are expressed in the two cell types d) the two types of cells have different chromosomes e) the two types of cells have different alleles of genes 3) Which of the following is NOT typically a mechanism by which the expression of genes is regulated? a) addition of chemical groups to proteins after the proteins are synthesized b) regulating the ability of spliceosomes to utilize potential splice sites c) regulating the ability of RNA polymerase to bind to a promoter d) regulating whether a mature mRNA is translated by ribosomes e) regulating whether a gene is copied during DNA replication 4) An enhancer: 5) One example of the post-transcriptional control of gene expression is the regulation of: 6) In eukaryotes, but not in prokaryotes:
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  • Spring '14
  • Jarvi
  • Biology, DNA, CAP binding protein, regulatory DNA element

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