final_2023_2번

2번

발문

제시글은 glycolysis(해당작용)의 intermediate(중간체)들의 일부이다. Glycolysis 과정에서 먼저 발생되는 순서대로 나열한 것을 고르시오. (E, 2점)

선지

(A) 1,3-bisphosphoglycerate (B) Fructose 1,6-bisphosphate (C) Phosphoenolpyruvate (D) Dihydroxyacetone phosphate

① A, B, C, D ② A, B, D, C ③ B, A, C, D ④ B, D, A, C ⑤ C, D, A, B

관련 내용

• Glycolysis_MOC

해설

정답: ④ B, D, A, C

Glycolysis 전체 순서:

1. Glucose → Glucose-6-phosphate (Hexokinase, ATP 소모)
2. → Fructose-6-phosphate
3. → Fructose 1,6-bisphosphate (B) (Phosphofructokinase, ATP 소모)
4. → Dihydroxyacetone phosphate (D) + Glyceraldehyde-3-phosphate (Aldolase)
   • DHAP ↔ G3P (Triose phosphate isomerase)
5. G3P → 1,3-bisphosphoglycerate (A) (Glyceraldehyde-3-phosphate dehydrogenase, NADH 생성)
6. → 3-phosphoglycerate (ATP 생성)
7. → 2-phosphoglycerate
8. → Phosphoenolpyruvate (C) (Enolase)
9. → Pyruvate (Pyruvate kinase, ATP 생성)

순서: B → D → A → C ④