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Homework answers / question archive / University of South Florida, St

University of South Florida, St

Nursing

University of South Florida, St. Petersburg

BSC 1005C

Quiz 2:

1)While some mutations in the coding sequence of DNA may prove to be positive, most mutations negatively impact the lives of individuals. However, some mutations have no effect at all. How is this possible?

 

  1. The effectiveness of certain anesthetics depends in part on their lipid solubility. Why is this?

 

  1. What constitutes a free radical?

 

  1. Identify the structure labeled “E”.
  2. What complementary RNA nucleotide would be added at position “4”?
  3. Identify the component involved in transcription labeled “B”.
  4. Advances in stem cell research has had clinically significant breakthroughs that may ultimately lead to stopping the progression of or curing diseases. Which neurogenerative disease characterized by the progressive degeneration and loss of dopamine-producing neurons may be the first disorder suited for treatment by implanting stem cells?

 

  1. If a DNA coding sequence contains 15 nucleotides, how many mRNA codons will there be?

 

  1. A specific amino acid carried by a tRNA is determined by its:

 

  1. Which anticodon would pair with the mRNA codon, CTA?

 

  1. The central dogma of molecular biology states that DNA is                             into mRNA, and mRNA is           into protein. The first step of mRNA synthesis from DNA utilizes the enzyme

                                         .

 

  1. What is the nucleotide sequence of an mRNA strand that has been transcribed from the DNA sequence GGTAGC?

 

  1. Telomerase activity declines as we get older, and the effects are associated with the aging process.

The less telomerase activity, the shorter the telomere sequences, and eventually they become so short that the cell can no longer divide. What condition in adults is associated with an increase in telomerase activity?

  1. What type of mutation permanently changes a single nucleotide in a DNA sequence that affects one codon?
  2. Death of one or more cells in an organ or tissue due to disease, injury, or inadequate blood supply is called                                                .

 

 

 

 

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