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Biology Question 109 – NEET-UG 2026

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How many molecules of pyruvic acid are produced at the end of glycolysis from 206 molecules of glucose ?

Glycolysis is the metabolic pathway that converts glucose into pyruvate.

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Ninja Strategy•Stoichiometric Logic

Recognize that glycolysis produces two pyruvic acid molecules per glucose, immediately eliminating options that are not double the input or are odd numbers.

Step 1: Understand the Glycolysis Process✦ Active

Glycolysis is the first stage of cellular respiration, where one molecule of glucose (a 6-carbon sugar) is broken down into smaller molecules.

Step 2: Determine Pyruvic Acid Yield per Glucose○ Expand

At the end of glycolysis, one molecule of glucose is converted into two molecules of pyruvic acid (a 3-carbon compound).

💡 Teacher's Secret Hint

Remember the stoichiometry: 1 glucose → 2 pyruvate.

Step 3: Calculate Total Pyruvic Acid Molecules○ Expand

Given 206 molecules of glucose, the total number of pyruvic acid molecules produced will be:

206 (glucose molecules)×2 (pyruvic acid per glucose)=412 pyruvic acid molecules
💡 Teacher's Secret Hint

Ensure your calculation reflects the 1:2 ratio.

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