Human Biology (MindTap Course List)
11th Edition
ISBN: 9781305112100
Author: Cecie Starr, Beverly McMillan
Publisher: Cengage Learning
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Chapter 21, Problem 1CT
Summary Introduction
To explain: Whether the mutation in DNA or mutation in mRNA is harmful.
Introduction: DNA is the genetic material of some viruses, prokaryotes, archaea, and eukaryotes. The mRNA is synthesized by transcription from a DNA template and plays a vital role in protein synthesis. Mutations are the changes in the DNA sequences that are heritable if it occurs in germ line cells.
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Which type of point mutation does not affect the resulting protein?
a
deletion
b
missense mutation
c
silent mutation
d
nonsense mutation
Which best shows a harmful effect of a mutation?
Is a random mutation more likely to be beneficial or harmful?Explain your answer.
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- The word mutation is generally considered to be negative. However, is there a positive side to mutations? Briefly explain your answer.arrow_forwardAddition or deletion of bases causes which kind of mutation? Select one: a. Frameshift mutation b. Transversion c. Transition d. Transcriptionarrow_forwardA mutation in a gene’s exons is more damaging than a mutation in a genes intron. Do you agree or disagree with this statement? Explain your answer.arrow_forward
- Which type of mutation produces the same protein despite a change in the DNA? A. nonsense B. missense C. silent D. frameshiftarrow_forwardUsing an example, explain why some mutations are not harmful.arrow_forwardSelect the best answer or answers from the choices given: If DNA has a sequence of AAA, then a segment of mRNA synthesized on it will have a sequence of (a) TTT, (b) UUU, (c) GGG, (d) CCC.arrow_forward
- What are point mutations? Of the different mutations, which is the most deleterious? Justify your answer with suitable genetic disease.arrow_forward_____ is a change in the order of one nucleotide in a section of a DNA molecule. a Point mutation b Spontaneous mutation c Somatic mutation d Germ mutationarrow_forwarda mutation in dna that adds +1 ot -1 nucleotide or +2 or -2 nucleotides is called a______? (choose one answer only) A. frameshift mutation B. silent mutation C. nonsense mutation D. missense mutationarrow_forward
- When can a mutation on the DNA cause shortening of the translation product? Give a specific example to support your answer.arrow_forwardA science student claims that a substitution mutation is less likely to affect gene function than an insertion or deletion mutation. Use logical reasoning to evaluate this claim.arrow_forwardIs mutation really necessary or can we live without it? Support your answer. make an essay type answer and examplesarrow_forward
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