Question

question 5 of 26

the model shows an error that can occur during dna replication.

which type of replication error does it represent?

a. substitution
b. insertion
c. inversion
d. deletion

Explanation:

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<reasoning>

Analyze the template strand

The template DNA strand has the sequence:
A - G - A - C - C - A - [C] - G - A - T - T - C
Notice the extra cytosine nucleotide labeled C in the yellow tab above the main sequence.

Observe replication process

During replication, the complementary nucleotides are paired:

• A pairs with T
• G pairs with C

The extra cytosine C is being added into the newly synthesized strand.

Identify the resulting strand

The resulting DNA strand contains an extra nucleotide:
T - C - T - G - G - T - [A newly inserted nucleotide] - C - T - A - A - G
This represents an addition of a base pair.

Define the mutation type

An addition of one or more nucleotides is an insertion.
Using our understanding of DNA Structure, adding a base is an insertion.
</reasoning>

<answer>
<mcq-option>A. Substitution</mcq-option>
<mcq-correct>B. Insertion</mcq-correct>
<mcq-option>C. Inversion</mcq-option>
<mcq-option>D. Deletion</mcq-option>
</answer>

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Answer:

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<reasoning>

Analyze the template strand

The template DNA strand has the sequence:
A - G - A - C - C - A - [C] - G - A - T - T - C
Notice the extra cytosine nucleotide labeled C in the yellow tab above the main sequence.

Observe replication process

During replication, the complementary nucleotides are paired:

• A pairs with T
• G pairs with C

The extra cytosine C is being added into the newly synthesized strand.

Identify the resulting strand

The resulting DNA strand contains an extra nucleotide:
T - C - T - G - G - T - [A newly inserted nucleotide] - C - T - A - A - G
This represents an addition of a base pair.

Define the mutation type

An addition of one or more nucleotides is an insertion.
Using our understanding of DNA Structure, adding a base is an insertion.
</reasoning>

<answer>
<mcq-option>A. Substitution</mcq-option>
<mcq-correct>B. Insertion</mcq-correct>
<mcq-option>C. Inversion</mcq-option>
<mcq-option>D. Deletion</mcq-option>
</answer>

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