Biology Lab Final Exam Questions With Complete Solutions

During DNA replication, correct answer: each parental strand serves as a template for the synthesis of a complementary strand How would the shape of a DNA molecule change if adenine paired with guanine and cytosine paired with thymine? correct answer: The DNA molecule would have irregular widths along its length. Which of the following is true about double-stranded DNA? correct answer: Its strands have a sugar-phosphate backbone. Why is DNA extraction and isolation an important laboratory technique? correct answer: DNA extraction is an early step in many frequently used research and diagnostic laboratory procedures. How will you select and grow a resistant strain of E. coli in this experiment? correct answer: Expose a sample of E. coli to streptomycin by inoculating it onto a streptomycin positive plate. Any colonies that grow will carry a mutation for resistance. When you are extracting DNA one of the steps is to denature proteins with soap. correct answer: false