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AP Bio Citric Acid Cycle / Krebs Cycle

Authored by Samantha Shen

Biology

11th Grade - University

NGSS covered

Used 146+ times

AP Bio Citric Acid Cycle / Krebs Cycle
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This AP Biology quiz comprehensively covers the Krebs cycle (citric acid cycle) and its role within cellular respiration, targeting students at the 11th-12th grade level studying advanced placement biology. The questions assess students' understanding of the biochemical processes that occur during aerobic respiration, requiring mastery of complex metabolic pathways, molecular counting, and the spatial organization of cellular structures. Students must demonstrate knowledge of substrate and product relationships, enzyme cofactors like NAD+ and FAD+, the regenerative nature of the cycle through oxaloacetate, and the quantitative aspects of ATP, NADH, and FADH2 production. The quiz also tests understanding of oxidation-reduction reactions, mitochondrial anatomy including the matrix and cristae, and how the Krebs cycle integrates with glycolysis and the electron transport chain to complete cellular respiration. Created by Samantha Shen, a Biology teacher in US who teaches grade 11-13. This quiz serves as an excellent formative assessment tool for AP Biology students preparing for both classroom examinations and the AP exam itself. Teachers can deploy this quiz as a comprehensive review session before unit tests, assign it as homework to reinforce lecture material, or use it as a warm-up activity to gauge student readiness for advanced topics like chemiosmosis and oxidative phosphorylation. The quiz effectively supports instruction by requiring students to synthesize knowledge across multiple biological scales, from molecular interactions to organellar function, making it ideal for identifying knowledge gaps before summative assessments. This assessment aligns with AP Biology Learning Objectives 2.4-2.8 covering cellular energetics and metabolic processes, and supports the College Board's emphasis on quantitative reasoning and mechanistic understanding of biological systems.

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41 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The "regenerator" of the Krebs Cycle is:

Oxaloacetate
Acetyl-CoA
Citrate
α-Ketoglutarate

Tags

NGSS.HS-LS1-7

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Before entering Krebs Cycle, pyruvate is:

Oxidized
Reduced
Isomerized to Acetyl-CoA
Phosphorylated

3.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

The number of ATP molecules produced out of Krebs Cycle is:

2
3
4
0

Tags

NGSS.HS-LS1-7

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many FADH2 molecules are produced by 1 molecule of glucose?

1
2
3
4

Tags

NGSS.HS-LS1-7

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many FADH2 molecules are produced by 1 turn of the Krebs Cycle?

1
2
3
4

Tags

NGSS.HS-LS2-3

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many NADH molecules are produced by a molecule of glucose through the Krebs' Cycle?

2
3
4
6

Tags

NGSS.HS-LS1-7

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is not a requirement for the Krebs Cycle?

NAD+
FAD+
Water
Pyruvate

Tags

NGSS.HS-LS1-7

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