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In eukaryotic genes, coding sequences ar...

In eukaryotic genes, coding sequences are called :

A

introns

B

operons

C

exons

D

cistrons

Text Solution

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The correct Answer is:
To answer the question, "In eukaryotic genes, coding sequences are called:", we will follow these steps: ### Step 1: Understand the Structure of Eukaryotic Genes Eukaryotic genes have a specific structure that includes both coding and non-coding sequences. The coding sequences are the parts of the gene that are expressed and translated into proteins. **Hint:** Eukaryotic genes are not continuous; they have segments that are expressed and segments that are not. ### Step 2: Identify the Types of Sequences In eukaryotic genes, there are two main types of sequences: - **Exons:** These are the coding sequences that are expressed in the final RNA product. - **Introns:** These are non-coding sequences that are present in the gene but are removed during RNA processing. **Hint:** Think about which sequences are included in the final RNA product after processing. ### Step 3: Clarify the Function of Exons and Introns Exons are the segments of DNA that remain in the mature mRNA after the introns are spliced out. Introns do not contribute to the final protein product and are discarded during the RNA processing. **Hint:** Remember, exons are expressed, while introns are intervening sequences that are removed. ### Step 4: Analyze the Options Given The options provided are: - **Introns:** Non-coding sequences that are removed. - **Operons:** Groups of genes that regulate structural genes, not specific to eukaryotes. - **Exons:** The correct answer, as they are the coding sequences. - **Cistrons:** A segment of DNA that codes for a polypeptide, but not specifically the term used for coding sequences in eukaryotic genes. **Hint:** Focus on the definitions of each term and their relevance to eukaryotic gene structure. ### Step 5: Conclude the Answer Based on the definitions and the structure of eukaryotic genes, the coding sequences in eukaryotic genes are called **exons**. **Final Answer:** In eukaryotic genes, coding sequences are called **exons**.
To answer the question, "In eukaryotic genes, coding sequences are called:", we will follow these steps: ### Step 1: Understand the Structure of Eukaryotic Genes Eukaryotic genes have a specific structure that includes both coding and non-coding sequences. The coding sequences are the parts of the gene that are expressed and translated into proteins. **Hint:** Eukaryotic genes are not continuous; they have segments that are expressed and segments that are not. ### Step 2: Identify the Types of Sequences ...
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