BIOL 4003 Module 10 questions and
answers rated A+
Mutation - correct answer ✔✔ A heritable change in the genetic material.
Do mutations provide allelic variation? - correct answer ✔✔ Yes
What is the positive side of mutations? - correct answer ✔✔ They are the foundation for
evolutionary change needed for a species to adapt to changes in the environment.
What is the negative side of mutations? - correct answer ✔✔ New ones are much more likely to
be harmful than beneficial to the individual and are often the cause of diseases.
Homologous recombination - correct answer ✔✔ The exchange of identical or similar DNA
segments between homologous chromosomes, which enhances genetic diversity and is involved
in DNA repair.
Mutations can be... - correct answer ✔✔ Changes in chromosome structure.
Changes in chromosome number.
Changes in DNA of a single gene (focus of this module).
Point mutation - correct answer ✔✔ A change in a single base pair.
Base substitution - correct answer ✔✔ A change in the base of a single nucleotide.
, Transition - correct answer ✔✔ A change of a pyrimidine (C, T) to another pyrimidine or a
purine (A, G) to another purine.
How do I remember the purines? (A & G) - correct answer ✔✔ Pure As Gold
Transversion - correct answer ✔✔ A change of a pyrimidine to a purine or vice versa.
Are transitions more common than transversions? - correct answer ✔✔ Yes
Silent mutation - correct answer ✔✔ A base substitution that doesn't alter the amino acid
sequence of the polypeptide due to the degeneracy of the genetic code.
Missense mutation - correct answer ✔✔ A base substitution in which an amino acid change
does occur.
Neutral mutation - correct answer ✔✔ A missense mutation that doesn't create a detectable
effect on the function of the protein; this is more likely if the new amino acid has similar
chemistry to the amino acid it replaced.
Nonsense mutation - correct answer ✔✔ A base substitution that changes a normal codon to a
stop codon.
Frameshift mutation - correct answer ✔✔ The addition or deletion of a number of nucleotides
that isn't divisible by three; this shifts the reading frame so that translation of the mRNA results
in a completely different amino acid sequence downstream of the mutation.
Up promoter mutation - correct answer ✔✔ Increases transcription.
Down promoter mutation - correct answer ✔✔ Decreases transcription.
answers rated A+
Mutation - correct answer ✔✔ A heritable change in the genetic material.
Do mutations provide allelic variation? - correct answer ✔✔ Yes
What is the positive side of mutations? - correct answer ✔✔ They are the foundation for
evolutionary change needed for a species to adapt to changes in the environment.
What is the negative side of mutations? - correct answer ✔✔ New ones are much more likely to
be harmful than beneficial to the individual and are often the cause of diseases.
Homologous recombination - correct answer ✔✔ The exchange of identical or similar DNA
segments between homologous chromosomes, which enhances genetic diversity and is involved
in DNA repair.
Mutations can be... - correct answer ✔✔ Changes in chromosome structure.
Changes in chromosome number.
Changes in DNA of a single gene (focus of this module).
Point mutation - correct answer ✔✔ A change in a single base pair.
Base substitution - correct answer ✔✔ A change in the base of a single nucleotide.
, Transition - correct answer ✔✔ A change of a pyrimidine (C, T) to another pyrimidine or a
purine (A, G) to another purine.
How do I remember the purines? (A & G) - correct answer ✔✔ Pure As Gold
Transversion - correct answer ✔✔ A change of a pyrimidine to a purine or vice versa.
Are transitions more common than transversions? - correct answer ✔✔ Yes
Silent mutation - correct answer ✔✔ A base substitution that doesn't alter the amino acid
sequence of the polypeptide due to the degeneracy of the genetic code.
Missense mutation - correct answer ✔✔ A base substitution in which an amino acid change
does occur.
Neutral mutation - correct answer ✔✔ A missense mutation that doesn't create a detectable
effect on the function of the protein; this is more likely if the new amino acid has similar
chemistry to the amino acid it replaced.
Nonsense mutation - correct answer ✔✔ A base substitution that changes a normal codon to a
stop codon.
Frameshift mutation - correct answer ✔✔ The addition or deletion of a number of nucleotides
that isn't divisible by three; this shifts the reading frame so that translation of the mRNA results
in a completely different amino acid sequence downstream of the mutation.
Up promoter mutation - correct answer ✔✔ Increases transcription.
Down promoter mutation - correct answer ✔✔ Decreases transcription.
