What Are Introns? — Definition & Role in Transcription
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- Parts of a Gene: Intron Within DNA we find segments called genes, which code for proteins. Within protein-coding genes are segments called introns and exons. A scientist named W…
By Aaron Lauer, Deena Hauze, Gabi Slizewska, Mario Janakis
- (Video) What Are Introns and Exons? by A Tale of Two Genes A strand of DNA contains many genes. Genes are the parts of DNA that contain the genetic information used by our cells…
By Deena Hauze, Alex Federspiel, Gabi Slizewska, Mario Janakis
- What Is an Intron? By now, you might know that our DNA contains genes, and that genes are used to string together amino acids to make proteins which help us survive. But it's no…
By Gabi Slizewska, Sylvia Freeman, Mario Janakis
Problems 20
- Which of the following statements is true?
- What is an mRNA strand called before it has its introns removed?
- What happens to the introns copied into mRNA?
- What are the blue segments in the diagram above?
- What is the purpose of introns?
- RNA segments B, D, and G would be considered woah‾\underline{\phantom{woah}}woah since they appear in the pre-mRNA but not the mature mRNA molecule. Because B, D, and G are pre…
- The picture above illustrates a mutation in a strand of pre-mRNA, denoted by a red X. The pre-mRNA is spliced normally. How might this mutation affect the protein produced?
- What would likely happen if an intron was included in the final mRNA to code for the protein product?
- What are the noncoding regions of a pre-mRNA called?
- What is the difference between the makeup of pre-mRNA and mRNA molecules?
- What type of molecule removes the introns from pre-mRNA molecules?
- Where would you find introns?
- Which of the following could the molecule above be?
- After transcription of one gene, you see two different strands of RNA. How can you tell which strand is pre-mRNA?
- The presence of which of the following allows for alternative splicing?
- Why do parts of the DNA strand form those loops?
- A DNA strand binds to its mRNA transcript and looks something like the picture above. What are the loops that are formed by the DNA strand?
- What is the defining characteristic of pre-mRNA?
- Which molecular machine is responsible for removing introns from pre-mRNA?
- Which of the following phrases would be the most useful in remembering what an intron is?