Question

a cells dna is replicating prior to undergoing mitosis. the table shows an error that occurs as the dna replicates.
nucleotide sequence
original sequence: tcgatgcat
sequence with replication error: tcgtagcat
how could this altered dna sequence cause a problem for the daughter cell that inherits it?
the dna will not be converted into an rna molecule.
the error may affect the synthesis of an important protein.
the error will cause similar errors in all other chromosomes.
the inherited traits controlled by the dna will all be recessive.
a
b
c
d

Explanation:

DNA sequence errors can lead to incorrect mRNA codons during transcription. Incorrect codons can result in wrong amino acids in proteins during translation. Proteins are crucial for cell functions. So, an error in DNA sequence (like the one shown) may affect protein synthesis.

• Option A: DNA can still be converted to RNA (transcription can occur even with some errors, just may be faulty).
• Option B: Correct as explained above.
• Option C: One DNA sequence error doesn't cause errors in all other chromosomes.
• Option D: There's no indication that the error makes all traits recessive.

Answer:

B. The error may affect the synthesis of an important protein.