AIIMS Nagpur NO- 2020
Applied Nutrition & Dietetics
Hard
All of the following are a good source of Omega 3 PUFA; EXCEPT:
Appeared in: AIIMS Nagpur NO- 2020
Explanation
- Corn oil is not considered a good source of Omega-3 fatty acids.
- It is primarily composed of Omega-6 fatty acids, specifically linoleic acid (LA), which makes up about 50% of its content.
- Its Omega-3 content, in the form of alpha-linolenic acid (ALA), is very low, typically around 1%.
- This high ratio of Omega-6 to Omega-3 makes it a poor choice for increasing Omega-3 intake.
Why Other Options Were Wrong
- Option A: Mustard oil is a good plant-based source of Omega-3 fatty acids.
- Option B: Fish oil is one of the richest and most direct sources of Omega-3 fatty acids.
- Option D: This option is also technically a correct answer, as Ground oil (groundnut/peanut oil) is also a poor source of Omega-3 PUFA.
Related Visual
Clinical Relevance
- Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Identification of dietary sources of Omega-3 Polyunsaturated Fatty Acids (PUFA) as background academic context rather than a clinical decision trigger.
- Maintaining a healthy balance between Omega-6 and Omega-3 fatty acids is crucial for managing inflammation. A typical modern diet is excessively high in Omega-6s and low in Omega-3s, which can promote chronic inflammation.
- Nurses should advise patients, especially those with cardiovascular or inflammatory conditions, to reduce intake of oils high in Omega-6 (like corn and groundnut oil) and increase intake of foods rich in Omega-3 (like fish, flaxseeds, walnuts, and mustard oil).
- What if the patient is a strict vegetarian? The nurse should recommend plant-based Omega-3 sources like flaxseed oil, chia seeds, walnuts, and mustard oil to ensure adequate ALA intake.
How to Approach the Question
- First, identify the keyword 'EXCEPT'. This means you are looking for the option that does not belong with the others.
- The question asks which oil is NOT a good source of Omega-3 PUFA.
- Recall or look up the fatty acid profiles of the oils listed.
- Evaluate each option: Fish oil is a prime source of Omega-3s (EPA/DHA). Mustard oil is a good source of plant-based Omega-3 (ALA). Eliminate these two.
- You are left with Corn oil and Ground oil. Both are known to be high in Omega-6 and low in Omega-3.
- Recognize that the question may be slightly flawed by having two correct answers. In such cases, select the most classic or extreme example. Corn oil is a very common textbook example of an oil with a high Omega-6 to Omega-3 ratio.
Concept Tested & Keywords
- Concept Tested: Identification of dietary sources of Omega-3 Polyunsaturated Fatty Acids (PUFA).
- Stem keywords: Omega 3 PUFA, good source, Mustard oil, Fish oil, Corn oil, Ground oil
- Lead-in keywords: EXCEPT
- Negative lead-in flag: The question uses the negative keyword 'EXCEPT', asking the test-taker to identify the option that does NOT fit the criteria of being a good source of Omega-3 PUFA.
Question ID
QMLA-Jgqrja2B4NSmyjV25
Reference Book
E6 Parks TextBook of Preventive & Social Medicine part 2 — Subpart A (pp 1-232 of 464) p. 146-148
E6 Textbook of Biochemistry for medical StudentsDM Vasudevan Part 2 — Subpart A (pp 1-239 of 478) p. 187-189
Practise the full AIIMS Nagpur NO- 2020
Attempt every question from this paper in a timed mock, then review the full solution for each one.
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