Question:
Given below are two statements
Statement I: Operon models of gene regulation are applicable to prokaryotes only
Statement II: Eukaryotic DNA contain intervening pieces of DNA called Introns
In light of the above statements, choose the correct answer from the options given below
Given below are two statements
Statement I: Operon models of gene regulation are applicable to prokaryotes only
Statement II: Eukaryotic DNA contain intervening pieces of DNA called Introns
In light of the above statements, choose the correct answer from the options given below
Statement I: Operon models of gene regulation are applicable to prokaryotes only
Statement II: Eukaryotic DNA contain intervening pieces of DNA called Introns
In light of the above statements, choose the correct answer from the options given below
Show Hint
Operon = Bacterial "On/Off" switch for multiple genes.
Introns = Eukaryotic "Junk" or "Intervening" DNA that must be cut out.
Introns = Eukaryotic "Junk" or "Intervening" DNA that must be cut out.
Updated On: Aug 24, 2026
- Both Statement I and Statement II are correct
- Both Statement I and Statement II are incorrect
- Statement I is correct but Statement II is incorrect
- Statement I is incorrect but Statement II is correct
Show Solution
Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Step 1: Understanding the Question:
This question highlights the fundamental differences in gene organization and regulation between prokaryotes (bacteria) and eukaryotes (higher organisms).
Step 2: Detailed Explanation:
• Operon Model (Statement I): Proposed by Jacob and Monod, an operon is a cluster of genes under the control of a single promoter and operator. This allows for coordinated regulation of metabolic pathways in prokaryotes. In eukaryotes, genes for a pathway are typically scattered across different chromosomes and regulated individually. Thus, Statement I is generally considered Correct in the context of standard biology exams.
• Introns (Statement II): Eukaryotic genes are "split genes." They consist of Exons (coding regions) and Introns (non-coding, intervening regions). Introns are transcribed into pre-mRNA but are removed during RNA splicing to create the mature mRNA. Prokaryotes rarely have introns in their protein-coding genes. Thus, Statement II is Correct.
Final Answer:
Both statements describe classic differences in the molecular biology of the two domains of life.
This question highlights the fundamental differences in gene organization and regulation between prokaryotes (bacteria) and eukaryotes (higher organisms).
Step 2: Detailed Explanation:
• Operon Model (Statement I): Proposed by Jacob and Monod, an operon is a cluster of genes under the control of a single promoter and operator. This allows for coordinated regulation of metabolic pathways in prokaryotes. In eukaryotes, genes for a pathway are typically scattered across different chromosomes and regulated individually. Thus, Statement I is generally considered Correct in the context of standard biology exams.
• Introns (Statement II): Eukaryotic genes are "split genes." They consist of Exons (coding regions) and Introns (non-coding, intervening regions). Introns are transcribed into pre-mRNA but are removed during RNA splicing to create the mature mRNA. Prokaryotes rarely have introns in their protein-coding genes. Thus, Statement II is Correct.
Final Answer:
Both statements describe classic differences in the molecular biology of the two domains of life.
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