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A mutation within a gene changes the start codon to a stop condon. This mutation will not affect transcription; however, it will affect translation by preventing the initiation of polypeptide synthesis.​

A research studying corn finds that kernel color patterns are caused by DNA elements moving in and out of pigment genes. When only the Ds element is present, no transposition occurs. When both Ac and Ds are present, movement resumes. What explains this?

Is a random mutation more likely to be beneficial or harmful? Explain your answer thoroughly. 

What large complex functions to “cut” pre-mRNA in most eukaryotic organisms, removing introns to produce an mRNA ready to be translated?

Select all that apply. Horizontal gene transfer can include when a gene is acquired….

What is a major difference between the general transcription factors and regulatory transcription factors?

What enzyme relaxes supercoiling ahead of the replication fork in bacterial cells?

Pick ONE of the following essay prompts and thoroughly respond to it using complete sentences.Prompt 1: Answer the three following questions:What is a nucleosome-free region?Where are they typically found in a genome?How are nucleosome-free regions thought to be functionally important?Prompt 2: Answer the following questions:What is alternative splicing?What is its biological significancewhy would it be advantageous to a cell/organism?Prompt 3: Answer the following questions:What is a CpG island?Where would you expect one to be located?How does methylation of CpG islands affect gene expression?

The presence of telomeres at the ends of eukaryotic chromosomes is important because they:

A functional eukaryotic protein is typically made up of the information contained within what region of pre-mRNA?