A portion of a gene has the following DNA sequence: GAAGGAGTAGCA, which when translated gives the amino acid sequence leucine-proline-histidine-arginine. Assume a mutation causes a C to be inserted into the sequence in between the second A and the second
G. Predict how this would affect the protein produced when it is translated.
What will be an ideal response?
Each three bases is a codon, which codes for a specific amino acid. If a C is inserted into the sequence, the grouping of bases into codons would be completely different from that point on. The first codon would still be GAA, but the second codon would be changed from GGA to CGG, the codon after that would become AGT instead of GTA, and so on. This would completely change the amino acid sequence and would completely change the protein produced.
You might also like to view...
The largest waterborne epidemic ever to occur in the United States occurred in which of the following cities?
A) Chicago B) Los Angeles C) Milwaukee
The eastern meadowlark and the western meadowlark are two bird species that look very similar to each other. Why do biologists not consider them the same species?
A) Species are not determined by appearance but by their ability to interbreed naturally. B) The two species do not live in the same habitat and thus do not interbreed in nature. C) The two species experience the reproductive barrier of habitat isolation. D) All of the above are correct.
Which of the following plant hormones stimulates the ripening of fruit and inhibits plant growth?
A. abscisic acid B. ethylene C. cytokinin D. auxin E. gibberellin
As a morula, the embryo consists of
A) a hollow ball of cells. B) a cluster of cells that are much larger than normal cells. C) cells that have different DNA content. D) a solid mass of cells, each the size of the zygote. E) three differentiated layers of cells.