Which of the following statements about mutations is TRUE?Select one alternative:Induced mutations occur naturally during DNA replication.Spontaneous mutations are always corrected by DNA repair enzymes.Mutagens increase the mutation rate above the spontaneous rate.Frame shift mutations mainly involve single base substitutions.
Question
Which of the following statements about mutations is TRUE?Select one alternative:Induced mutations occur naturally during DNA replication.Spontaneous mutations are always corrected by DNA repair enzymes.Mutagens increase the mutation rate above the spontaneous rate.Frame shift mutations mainly involve single base substitutions.
Solution
The correct statement about mutations is: "Mutagens increase the mutation rate above the spontaneous rate."
Here's why:
-
Induced mutations do not occur naturally during DNA replication. They are caused by external factors such as radiation or chemicals.
-
Spontaneous mutations are not always corrected by DNA repair enzymes. While these enzymes do correct many errors, some mutations can still occur.
-
Frame shift mutations do not mainly involve single base substitutions. Instead, they involve the insertion or deletion of one or more nucleotides in the DNA sequence, which shifts the reading frame of the genetic code.
-
Mutagens increase the mutation rate above the spontaneous rate. This is true because mutagens are agents, like certain chemicals or radiation, that increase the rate of genetic mutation.
Similar Questions
Mutation is an important evolutionary mechanism and occurs with a permanent change in a nucleotide sequence. Which statements about mutations are true? Select TWO correct answers.Select one or more:a.Mutations must occur in gametes in order to be passed onto offspring.b.Most mutations do not result in a phenotype that increases the individual's fitness.c.Mutations occur very rarely in organisms.d.All mutations are harmful.e.Mutations decrease genetic variation in a population.
Which of the following statements is true about mutations?i. They can produce new alleles of existing genes.ii. They can be inherited if they are in somatic cells.iii. They may affect a single codon or a part of a chromosomeiv. They are always linked to diseasei, ii and iiii and iiiii and iiii, ii, iii and iv
Which of the following statements is INCORRECT?Group of answer choicesDamaged DNA is usually repaired by cells.Mutations are more likely to occur in rapidly dividing cells.Cells with damaged DNA often undergo apoptosis.Promotors cause mutations in DNA.
True or false: Mutations occur to phenotypes of a population.Question 8Select one:TrueFalse
.Mutations must occur in gametes in order to be passed onto offspring.b.Most mutations do not result in a phenotype that increases the individual's fitness.c.Mutations occur very rarely in organisms.d.All mutations are harmful.e.Mutations decrease genetic variation in a population.
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.