Question

How many glucose molecules are utilized if the cell produces 68 pyruvic acid molecules during glycolysis?

• A. \(17\)
• B. \(34\)
• C. \(51\)
• D. \(68\)

Hint:

One glucose molecule gives two pyruvic acid molecules in glycolysis, so divide the pyruvic acid count by two.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept
In glycolysis, one 6-carbon glucose molecule is split into two 3-carbon pyruvic acid molecules.

Step 2: Calculation
Glucose used \(= \dfrac{\text{pyruvic acid formed}}{2} = \dfrac{68}{2} = 34\).

Step 3: Compare the options
The value 34 matches option (B). The values 17 and 51 do not fit the 1 : 2 ratio, and 68 would be correct only if one glucose gave one pyruvic acid.

Final Answer:
34 glucose molecules are used. \[ \boxed{\text{(B) }34} \]