NEET 2026 ALL Q #1996
COMPETENCY BASED
APPLY
4 Marks 2026 NTA-RE-NEET-2026 MCQ SINGLE
How many molecules of pyruvic acid are produced at the end of glycolysis from 206 molecules of glucose?
(A) 412
(B) 206
(C) 309
(D) 103
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Correct Answer: A

AI Tutor Explanation

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Detailed Solution

Step 1: Understand the Glycolysis Stoichiometry

Glycolysis is the metabolic pathway that converts glucose into pyruvate. The balanced chemical equation for the breakdown of one molecule of glucose is: $$C_6H_{12}O_6 + 2NAD^+ + 2ADP + 2P_i \rightarrow 2 \text{ Pyruvic Acid} + 2NADH + 2H^+ + 2ATP$$ From this, we establish that 1 molecule of glucose yields 2 molecules of pyruvic acid.

Step 2: Apply the Calculation

Given that we have 206 molecules of glucose, we multiply the number of glucose molecules by the yield factor of 2: $$206 \times 2 = 412$$

Final Answer: 412

AI Suggestion: Option A

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Pedagogical Audit
Bloom's Analysis: This is an APPLY question because it requires the student to utilize the fundamental stoichiometric knowledge of cellular respiration to solve a numerical problem.
Knowledge Dimension: PROCEDURAL
Justification: The student must follow a specific algorithmic process (multiplication based on metabolic stoichiometry) to arrive at the correct quantitative result.
Syllabus Audit: In the context of NEET, this is classified as COMPETENCY. This question tests the student's ability to apply textbook knowledge of metabolic pathways to quantitative scenarios, which is a common pattern in NEET Biology sections.

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