8) Why would a single nucleotide insertion into the coding region of a gene most

Question

8) Why would a single nucleotide insertion into the coding region of a gene most likely cause a disastrous change in the resulting protein? Choose the most likely answer. a) This would cause a reading frame shift. b) This would change only a single amino acid in the resulting protein. c) A single base insertion would probable not cause a major change in the protein product. d) This would result in a new, better gene product. e) The cell would just express the non-mutated allele.a) The mutant is unable to synthesize arginine when given minimal medium +citrulline. b) There are mutations in genes responsible for synthesizing nutrients in pathways other than the arginine synthesis pathway. c) Ornithine lies downstream of citrulline in the Arginine synthesis pathway. d) Citrulline lies downstream of ornithine in the arginine synthesis pathway. e) The mutant cannot grow on medium containing all amino acids.

9) Point mutations that occur in a gene that lead to the incorrect amino acid in corporate into a growing polypeptide are known as what? a) Missense mutations b) Nonsense mutations c) Silent mutations d) Deletion mutations e) Frame-shift mutations.

10) If a parent is homozygous recessive for a particular trait, and the mother is heterozygous, what are the odds of having a child that displays the domain trait? a) 0% b) 25% c) 50% d) 75% e) 100%

Explanation / Answer

Answers:

Q8). a

Q9). a

Q10). c

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