UV Rays from the Sun Cause a Specific Type of Improper

question 66

Multiple Choice

UV rays from the sun cause a specific type of improper base pairing called a thymine dimer. If a cell cannot correct this problem, the section of DNA can be removed, causing a deletion of several nucleotides. What will this cause?

• A) A point mutation forms that leads to a change in one amino acid.
• B) A point mutation forms that leads to changes in a handful of amino acids.
• C) The codons shift by one letter, and all the codons before the mutation are changed.
• D) The codons could shift by one letter, and all the codons after that point would be off.

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