Point Mutations in DNA: Types, Diseases & Examples


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question 1 of 3

In point mutations, there are changes in one or a few nucleotides at a single location in a DNA sequence.

Which of the following is NOT a nucleotide?

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1. _____ is used to describe a mutation in which one nitrogenous base is replaced by another.

2. What are mutations that result in DNA sequences that are slightly too long or too short called?

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About This Quiz & Worksheet

This quiz and corresponding worksheet will help you gauge your knowledge of the types of point mutations in DNA. Topics you'll need to know include DNA sequences that are either too short or too long as well as how to best describe a mutation in which a base is replaced by another.

Quiz & Worksheet Goals

Use this printable worksheet and quiz to review:

  • Mutation in which a base is replaced by another
  • Cause of sickle cell anemia
  • Example of a base substitution

Skills Practiced

  • Interpreting information - verify you can read information regarding the cause of sickle cell anemia and interpret it correctly
  • Reading comprehension - ensure that you draw the most important information from the related biology lesson
  • Defining key concepts - ensure that you can accurately define main phrases and terms, such as point mutation and base substitution

Additional Learning

For more, review the corresponding lesson titled Point Mutations in DNA: Types, Diseases & Examples. This lesson will help you:

  • Describe mutation
  • Understand the characteristics of the point mutation
  • Explain the role of nucleotides in point mutation
  • Identify the four types of nucleotides
  • Appreciate the difference between base substitution and frameshift mutation
  • Know the diseases caused by point mutations