Mutations And Molecular Evolution

17 Questions

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Biology Quizzes & Trivia

In the normal being of a person, we have genetics, which dictates among other things, how our bodies develop. At times, the normal never happens. Mutations and molecular evolution quiz below has more on the subject.


Questions and Answers
  • 1. 
    Of the following terms, which one is likely to be the MOST common?
    • A. 

      Point mutation

    • B. 

      Missense mutation

    • C. 

      Base-pair substitution

    • D. 

      Nonsense mutation

    • E. 

      Frameshift mutation

  • 2. 
    Sickle-cell disease is probably the result of which kind of mutation?
    • A. 

      Point only

    • B. 

      Frameshift only

    • C. 

      Nonsense only

    • D. 

      Nondisjunction only

    • E. 

      Both B and D

  • 3. 
    • A. 

      Ultrasound

    • B. 

      Ultraviolet light

    • C. 

      Infra-red light

    • D. 

      Ultraviolent light

  • 4. 
    If a frameshift mutation causes a stop codon to be inserted into the DNA sequence...
    • A. 

      The resulting protein will not be affected

    • B. 

      The phenotype will change but not the genotype

    • C. 

      The resulting protein will be too short and non-functional

    • D. 

      The resulting protein will be too long and non-functional

  • 5. 
    A nucleotide deletion in DNA replication...
    • A. 

      Causes one amino acid of the protein to be incorrect

    • B. 

      Causes all of the amino acids of the protein to be incorrect

    • C. 

      Causes the amino acids inserted after the deletion to be incorrect

    • D. 

      Causes the amino acids inserted before the deletion to be incorrect

    • E. 

      Has no effect on the resulting protein

  • 6. 
    The addition of a single nucleotide to the DNA sequence causes a frameshift mutation
    • A. 

      True

    • B. 

      False

  • 7. 
    In a frameshift mutation, all of the amino acids before the shift are changed.
    • A. 

      True

    • B. 

      False

  • 8. 
    • A. 

      Back mutation

    • B. 

      Silent mutation

    • C. 

      Nonsense mutation

    • D. 

      Missense mutation

    • E. 

      Point mutation

  • 9. 
    A base substitution that causes regular codon to change in to another codon that codes for a different amino acids is said to be?
    • A. 

      Nonsense mutation

    • B. 

      Silent mutation

    • C. 

      Missense mutation

    • D. 

      None of the above

  • 10. 
    Addition or deletion of a nucleotide base pair involves
    • A. 

      Point mutation

    • B. 

      Silent mutation

    • C. 

      Nonsense mutation

    • D. 

      Frameshift mutation

  • 11. 
    Random mutations occur due to:
    • A. 

      Radiation

    • B. 

      Chemicals

    • C. 

      External facors

    • D. 

      All of the above

  • 12. 
    Point mutations have different effects because of the redundancy of the genetic code
    • A. 

      True

    • B. 

      False

  • 13. 
    DNA mutations are random
    • A. 

      True

    • B. 

      False

  • 14. 
    Proof-reading by DNA polymerases occurs through 'backing-up' and removal of incorrect nucleotides
    • A. 

      True

    • B. 

      False

  • 15. 
    DNA polymerase fixes 100% of incorrect bases
    • A. 

      True

    • B. 

      False

  • 16. 
    Using the molecular record to determine phylogenetic relationships is based on the assumption that
    • A. 

      Nucleotide sequences do not change over time

    • B. 

      Nucleotide sequences change at a fairly constant rate over time

    • C. 

      Nucleotide sequences change randomly and erratically over time

    • D. 

      Evolutionary changes occur in phenotypes but not in genotypes

    • E. 

      All mutations are harmful

  • 17. 
    • A. 

      Related organisms share a greater portion of their DNAs

    • B. 

      The haemoglobin gene is less similar between humans and dogs than between humans and chimpanzees

    • C. 

      Only DNA can be examined for establishing evolutionary differences

    • D. 

      Molecular evolution progresses more quickly when there is no selection for the gene

    • E. 

      Phylogenetic trees can be established using molecular evidence