Point Mutation — Definition & Types
Read this topicExplanations 4
- Why Do Mutations Happen? Point mutations occur when there is a mistake at a single point in either a DNA or an RNA sequence. These mutations, like most other mutations, occur wh…
By Aaron Lauer, Alex Federspiel, Gabi Slizewska, Valeri Natole, Mario Janakis
- What Is a Point Mutation? During either DNA replication or transcription, a nucleotide can get placed incorrectly. Enzymes like DNA polymerase or RNA polymerase can make these m…
By Deena Hauze, Alex Federspiel, Gabi Slizewska, Valeri Natole, Mario Janakis
- Explanation #8886
By Gabi Slizewska, Mario Janakis
- (Video) DNA Mutations Made Simple! by Simple Science Answers Mutation might seem like a scary word, but did you know it's just like changing one word in a sentence? Only, the se…
By Valeri Natole, Mario Janakis, Gabi Slizewska
Problems 20
- What is it called if a nucleotide is removed?
- An original DNA sequence is ATT GCA\text{ATT GCA}ATT GCA but after replication, it is ATT CCA\text{ATT CCA}ATT CCA. What kind of mutation happened?
- Which of these molecules can a point mutation not occur on?
- What sort of mutation occurs when one nucleotide is swapped for another?
- Fill in the blank: A mutation will typically be limited to one cell if it occurs in 000‾\underline{\phantom{000}}000.
- Which of the following is most likely to result in cancer?
- The original sequence reads TTGGCGATCGA. The mutated sequence reads TTGGCGTCGA. What type of mutation is this?
- The original sequence of a DNA strand is TTG GCG ATC GA\text{TTG GCG ATC GA}TTG GCG ATC GA. After mutation, it is TTG GGC GAT CGA\text{TTG GGC GAT CGA}TTG GGC GAT CGA. What type…
- How does the nature of the genetic code reduce the impact of point mutations in DNA?
- How are point mutations different from chromosomal mutations?
- Mutations can occur naturally but are sometimes induced by environmental factors called mutagens. What are mutagens?
- Why are mutations important?
- A codon is changed from UAC\text{UAC}UAC, which codes for the amino acid tyrosine, to UAG\text{UAG}UAG, a stop codon. Select all types of mutations that characterize this change.
- What effect can a point mutation have?
- What is a point mutation?
- Fabry disease is a genetic disorder caused by a malfunctioning protein. Which of the following is most likely responsible for this disease?
- One or several nucleotides are altered in a DNA sequence. What kind of mutation am I describing?
- Which of the following is a type of point mutation? Select any that apply.
- When do point mutations most likely occur?
- Gene therapy is a relatively new technique used to treat or cure genetic disorders. What does gene therapy most likely do?