6.3b Kahoot - exam Flashcards
best description of a point mutation
a mutation that affects a single nucleotide in a DNA sequence
an example of a frameshift mutation
deletion of a nucleotide from a DNA sequence
best description of a chromosomal mutation
a mutation that affects the # or structure of chromosomes
example of a chromosomal mutation
duplication of a segment of DNA
induced mutations are caused by random errors in replication
false
would cigarettes likely cause a spontaneous or induced mutation
induced mutation
how do spontaneous mutation impact an organism….
occur naturally without any apparent causes
how do spontaneous mutations make an impact
random change in the dna
induced mutations
- higher rate than spontaneous mutations
- mutagens – chemical or physical agents that alter DNA
- caused by environmental agents
how do induced mutations impact an organism
cause physiological changes inside the cell due to a mutagen
spontaneous mutations are caused by random errors in DNA replication
true
causes of an induced mutation
- tobacco
- x-rays
- uv exposure
example of physical mutagens
- radiation
- xrays
- uv lights
tobacco smoke is an example of a physical mutagen
false
insertion mutation
a base pair is added into a DNA sequence
a chemical mutagen causes mutations by reacting with DNA
true
a mutation that does not change the function of a protein is referred to as a
silent mutation
a nonsense mutation
results in an early stop codon
a missense mutation results in…
results in an altered amino acid sequence
a stop codon mutation will result in
a shorter protein
a nonsense mutation will…
replace an amino acid w a stop codon
which type of mutation changes a codon to a stop codon
nonsense
which types of mutations can be called “frameshift” mutations
deletion and mutation
t/f frameshift mutations can be more damaging in than a substitution mutation
true
