Ch 23: Michigan Merit Exam: Basics of DNA

About This Chapter

The brief and entertaining video lessons presented in this Basics of DNA chapter were designed by experienced instructors, and they will help you prepare for the biology section of the Michigan Merit Exam.

Michigan Merit Exam: Basics of DNA - Chapter Summary

As you prepare to take the Michigan Merit Exam, use this chapter of lessons to discover the double helix molecule that determines heredity and the causes and effects of damaging mutations. This chapter covers the following topics:

  • DNA: structure and heredity
  • Mutations, insertions, and deletions
  • Mutation and protein function
  • Environmental mutagens
  • Frameshift mutations: definition and effects
  • Causes of mutation: mutagens and irradiation

The video lessons are brief and entertaining and they come with a written transcript to enhance comprehension. When you want to review, you can use the interactive video timeline feature to skip straight to any major video topic. The quizzes and practice exams can expose you to the types of questions you are likely to face on test day and help ensure your knowledge.

Michigan Merit Exam: Basics of DNA Chapter Objectives

The state of Michigan measures the academic performance of its 11th-grade students every spring with the Michigan Merit Exam (MME). This chapter was designed to address one of the tests that fits within the larger MME umbrella, the computer-based M-Step science test. The M-Step has no time limit but is estimated to run 50 minutes on average.

7 Lessons in Chapter 23: Michigan Merit Exam: Basics of DNA
Test your knowledge with a 30-question chapter practice test
DNA: Discovery, Facts, Structure & Function in Heredity

1. DNA: Discovery, Facts, Structure & Function in Heredity

This lesson will help you to navigate the twists and turns of DNA's structure. We'll also clue you in on the amazing discoveries that put this nucleic acid in the limelight as the molecule of heredity.

What is a Point Mutation? - Definition, Causes & Types

2. What is a Point Mutation? - Definition, Causes & Types

What are genetic mutations? How do they affect our DNA? This lesson covers the basics of point mutations and provides simple examples of different mutation types.

Effects of Mutations on Protein Function: Missense, Nonsense, and Silent Mutations

3. Effects of Mutations on Protein Function: Missense, Nonsense, and Silent Mutations

How does a tiny point mutation change the way a protein works? What are the consequences of base substitutions? In this lesson, we'll use an imaginary creature to explore missense, nonsense and silent mutations.

Mutagens: How the Environment Affects Mutation Rates

4. Mutagens: How the Environment Affects Mutation Rates

What causes mutations to occur in living things? How do we avoid mutations? Are mutations always bad? Discover answers to these questions and more in this lesson on mutagens.

Effects of Frameshift Mutations: Definitions and Examples

5. Effects of Frameshift Mutations: Definitions and Examples

What is a frameshift in genetic translation? How can a frameshift mutation change a protein? In this lesson, learn about the codon reading frame and how frameshift mutations cause serious problems for polypeptide formation.

Causes of Mutation and DNA Damage- Mutagens

6. Causes of Mutation and DNA Damage- Mutagens

Mutations, or changes in DNA sequences, are incredibly important in biology, from evolution and diversity to cancer and genetic diseases. But how do mutations happen? In this lesson, you'll learn about mutagens, which are chemicals that can cause mutations.

Causes of Mutation and DNA Damage- Irradiation

7. Causes of Mutation and DNA Damage- Irradiation

By now, you know what mutations are and what effects they can cause, but how do mutations happen? In this lesson, learn about one important cause of mutations, irradiation.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
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Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
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