NEET Prep with NTA: Chilled Ethanol Role in DNA Purification Explained for NEET UG 2026
2 minute read
• Updated on 24 Apr, 2026, 10:59 AM, by Ishita Tanwar
Chilled ethanol is used to precipitate DNA during purification, an important concept for NEET UG 2026 biology preparation.
NEET Prep with NTA highlights an important concept from recombinant DNA technology where chilled ethanol is used during DNA purification. This concept is frequently asked in NEET UG 2026 Biology questions, especially in molecular biology and biotechnology topics. In the DNA purification process, chilled ethanol helps in precipitating DNA, making it visible and easier to separate from other cellular components.
NEET Prep with NTA DNA Purification Concept in Recombinant DNA Technology
In NEET Prep with NTA, the process of recombinant DNA technology includes multiple steps such as isolation, cutting, ligation, and purification. During DNA purification, chilled ethanol plays a crucial role. The NEET UG 2026 syllabus includes this topic under biotechnology techniques, where students are expected to understand how DNA behaves in different chemical conditions. The addition of chilled ethanol reduces the solubility of DNA in the solution, causing it to come out of the mixture as visible strands. This is a key point often tested in NEET UG 2026 biology MCQs.
Role of Chilled Ethanol in DNA Precipitation for NEET UG 2026
The NEET Prep with NTA concept clearly explains that chilled ethanol is used to precipitate DNA during purification. When ethanol is added at low temperatures, DNA molecules lose solubility and aggregate together.
- DNA becomes insoluble in chilled ethanol
- Visible DNA fibers are formed
- Separation from impurities becomes easier
- Helps in final purification step of recombinant DNA technology
This makes the topic important for NEET UG 2026 exam preparation.
NEET UG 2026 Biology MCQ Trend from DNA Purification
NEET Prep with NTA questions often come in MCQ format where students must identify reagents and their roles. In recent years, questions from recombinant DNA technology have shown a consistent pattern.
This shows that NEET UG 2026 may include direct questions on chilled ethanol and DNA precipitation.
Steps in DNA Purification (NEET Prep with NTA Guide)
- Cell lysis to release DNA
- Removal of proteins and RNA
- Addition of chilled ethanol
- DNA precipitation and collection
- Washing and purification
Each step is important for NEET UG 2026 conceptual clarity.
FAQs – NEET Prep with NTA DNA Purification
What is the role of chilled ethanol in DNA purification?
It helps in precipitating DNA by reducing its solubility.
Why is chilled ethanol used in recombinant DNA technology?
Low temperature ethanol helps DNA strands aggregate and separate from impurities.
Is DNA soluble in ethanol?
No, DNA becomes insoluble in chilled ethanol.
Is DNA purification important for NEET UG 2026?
Yes, it is an important topic from biotechnology.
Which chapter includes this concept in NEET syllabus?
It is included in molecular biology and biotechnology.
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