THE MOLECULAR BASIS OF INHERITANCE
DNA MAKES RNA MAKES PROTEIN
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The amino acid sequence would be shorter than expected.
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The identity of one amino acid would change.
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The identity of more than one amino acid would change.
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The amino acid sequence would remain unchanged.
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Detailed explanation-1: -16. Which of the following changes would be expected if a-CAUUUG-sequences of bases mutated to-CACUUG-? The amino acid sequence would be shorter than expected.
Detailed explanation-2: -If one amino acid in a protein sequence is changed the protein could change its function or become non-functional entirely. Amino acids make up the structure of proteins. If even one amino acid is changed, the three-dimensional structure of the protein can change, thus changing its function.
Detailed explanation-3: -Definition. A missense mutation is a DNA change that results in different amino acids being encoded at a particular position in the resulting protein.
Detailed explanation-4: -The bases in DNA and RNA have a sequence which dictates the sequence of amino acids, so any alteration of the sequence of bases in DNA can potentially alter the structure of proteins for which they code.
Detailed explanation-5: -Point Mutations A nucleotide change in the DNA that does not result in an amino acid change in the protein is called a “synonomous” or “silent” mutation (see Figure 3.3).