In eukaryotic DNA, regions called “CpG islands” are often associated with unusual gene expression patterns, particularly ________  expression. This alterations in gene expression are the result of __________.

The agouti locus helps determine coat color in mice, and this phenotype can vary from light to dark between genetically identical individuals. You have discovered a drug that reduces the variation in the agouti phenotype. What is a likely explanation for this drug’s mechanism of action? (Select all that apply)  

The following structure represents part of a macromolecule     Which circle shows a hydrogen bond? [option1] Which circle shows a phosphodiester bond? [option2] 

A microbiologist isolated a mutant strain of E. coli that is extremely susceptible to bacteriophage infection, by a wide range of bacteriophages. Which of the following genes might she explore as a possible site of the mutation that results in this particular phenotype?

Which of the following statements about mitochondria and chloroplasts is NOT true?

Bonus question: Is the molecule from the previous question DNA, RNA or protein? How do you know?

What is the coefficient of in the expansion of 

A bit string contains 1’s and 0’s. How many different 6-bit strings are there?  

Which of the following describes sequence 9, 8, 7, 7, 6, 5, 1?

True or False. The following graph is 3-edge-connected.