BIOL133 EXAM 2025 QUESTIONS AND
VERIFIED ANSWERS| 100% CORRECT
how is it possible for a mutation to not cause harm to the individual?
all of the above
- it can be in a non coding part of the genome -
it doesnt cause a change in the protein -the
mutation causes a beneficial change
Which characteristic of the genetic code lowers the likelihood of a mutation causing a
mutant phenotype?
redundancy
antibiotics cause mutations in bacteria
false
a spontaneous mutation usually originates as error in
DNA replication
what type of mutation has occurred? sickle cell anemia
missense
what type of mutation?
Original DNA: 3' AGCCGCATA 5'
Mutated DNA: 3' AGCCGCATC 5'
, nonsense
what type of mutation?
Original DNA: 3' AGCCGCATA 5'
Mutated DNA: 3' AGCCGTCATA 5
silent
•The gene KRTHAP1 codes for the production of hair keratin in humans and other primates.
•
•Chimp gene (exon 6): 3' ACGACCGCT 5'
•Human gene (exon 6): 3' ACGACTGCT 5'
What type of mutation occurred in humans?
protein is shorter
In Himalayan rabbits, the ears, feet, and muzzle are pigmented while the rest of the body is
white. This is because they express an enzyme variant that is ineffective at body temperature
but functions at the lower temperatures experienced by cells of the extremities. This is an
example of a
conditional mutation
What does this image suggest about the relationship between telomere length and stress?
stress decreases telomere length
What does this image suggest about the relationship between telomere length, stress
and exercise?
Stress decreases telomere length in sedentary people.
This chromosome is
submetacentric
VERIFIED ANSWERS| 100% CORRECT
how is it possible for a mutation to not cause harm to the individual?
all of the above
- it can be in a non coding part of the genome -
it doesnt cause a change in the protein -the
mutation causes a beneficial change
Which characteristic of the genetic code lowers the likelihood of a mutation causing a
mutant phenotype?
redundancy
antibiotics cause mutations in bacteria
false
a spontaneous mutation usually originates as error in
DNA replication
what type of mutation has occurred? sickle cell anemia
missense
what type of mutation?
Original DNA: 3' AGCCGCATA 5'
Mutated DNA: 3' AGCCGCATC 5'
, nonsense
what type of mutation?
Original DNA: 3' AGCCGCATA 5'
Mutated DNA: 3' AGCCGTCATA 5
silent
•The gene KRTHAP1 codes for the production of hair keratin in humans and other primates.
•
•Chimp gene (exon 6): 3' ACGACCGCT 5'
•Human gene (exon 6): 3' ACGACTGCT 5'
What type of mutation occurred in humans?
protein is shorter
In Himalayan rabbits, the ears, feet, and muzzle are pigmented while the rest of the body is
white. This is because they express an enzyme variant that is ineffective at body temperature
but functions at the lower temperatures experienced by cells of the extremities. This is an
example of a
conditional mutation
What does this image suggest about the relationship between telomere length and stress?
stress decreases telomere length
What does this image suggest about the relationship between telomere length, stress
and exercise?
Stress decreases telomere length in sedentary people.
This chromosome is
submetacentric
