QQuestionBiology
QuestionBiology
A single nucleotide deletion during DNA replication:
A. causes one amino acid of the protein to be incorrect
B. causes all of the amino acids of the protein to be incorrect
C. causes the amino acids encoded by nucleotides after the deletion to be incorrect
D. causes the amino acids encoded by nucleotides before the deletion to be incorrect
E. has no effect on the resulting protein
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Answer
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Step 1:: Understand the scenario described in the question.
A single nucleotide deletion during DNA replication can cause a shift in the reading frame, leading to incorrect translation of amino acids.
Step 2:: Recall the concept of how DNA is transcribed into mRNA and then translated into proteins.
A change in the DNA sequence can lead to a different mRNA sequence, which in turn can result in a different protein sequence.
Step 3:: Analyze the options given in the question.
Option A: This option suggests that only one amino acid of the protein will be incorrect. This is possible, as the deletion of a single nucleotide can shift the reading frame, causing the incorporation of incorrect amino acids immediately after the deletion point. Option B: This option states that all amino acids of the protein will be incorrect. This is also possible, as the single nucleotide deletion can cause a frameshift, leading to an entirely different sequence of amino acids downstream of the deletion point. Option C: This option is very similar to option A, and it is correct as well. The deletion of a single nucleotide will cause a shift in the reading frame, leading to the incorporation of incorrect amino acids starting from the point of deletion. Option D: This option is incorrect because the deletion affects the sequence of amino acids encoded after the deletion point, not before it. Option E: This option is incorrect because a single nucleotide deletion during DNA replication does have an effect on the resulting protein.
Step 4:: Since multiple options are correct, we need to consider the context of the question.
If the question asks for the most likely outcome, option C is more specific than option A and thus a better answer. However, if the question asks for all possible outcomes, then both options A and C are correct.
Final Answer
1. Causes one amino acid of the protein to be incorrect (Option A) 2. Causes the amino acids encoded by nucleotides after the deletion to be incorrect (Option C)
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