TCA CYCLE
Authored by Vivek Jedhe
Biology
University
NGSS covered
Used 251+ times
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About
This quiz focuses on the TCA (tricarboxylic acid) cycle, also known as the Krebs cycle or citric acid cycle, which is a fundamental topic in cellular respiration and biochemistry. Based on the complexity and specific biochemical knowledge required, this material is appropriate for advanced high school biology students, typically grades 11-12, or introductory college-level biology courses. Students need a solid understanding of cellular metabolism, enzyme function, and the molecular processes that occur within mitochondria. The questions assess comprehension of key cycle intermediates like acetyl CoA, oxaloacetate, and α-ketoglutaric acid, as well as the role of electron carriers NADH and FADH2 in energy production. Students must understand the relationship between glycolysis and the TCA cycle, recognize specific enzymatic reactions like oxidative decarboxylation, and grasp how this metabolic pathway connects to both energy production through oxidative phosphorylation and biosynthetic processes like amino acid formation. Created by Vivek Jedhe, a Biology teacher in India who teaches grade 13. This quiz serves as an excellent tool for reinforcing students' understanding of one of the most critical metabolic pathways in cellular biology. Teachers can effectively use this assessment as a formative evaluation tool to gauge student comprehension after teaching the TCA cycle, or as a focused review session before unit exams. The questions work well for homework assignments that require students to recall specific details about cycle intermediates and products, making it valuable for spaced practice and retention. This quiz also functions effectively as a warm-up activity to activate prior knowledge before diving into related topics like oxidative phosphorylation or metabolic regulation. The assessment aligns with Next Generation Science Standards HS-LS1-7, which focuses on cellular processes that release energy, and supports Common Core literacy standards in science through its emphasis on precise scientific terminology and process understanding.
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7 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Product of Krebs cycle essential for oxidative phosphorylation is _______
NADPH and ATP
Acetyl CoA
CO2 and oxaloacetate
NADH and FADH2
Tags
NGSS.HS-LS1-7
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A single molecule of glucose generates _________ molecules of acetyl CoA, which enters the Krebs cycle.
1
2
3
4
Tags
NGSS.HS-LS1-7
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
___________ accepts hydrogen from malate
NAD
FAD
NADP
FMN
Tags
NGSS.HS-LS1-7
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the intermediate of the Kreb’s cycle is utilised in the formation of amino acids?
Citric acid
Malic acid
Isocitric acid
𝛼-ketoglutaric acid
Tags
NGSS.HS-LS1-6
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Acetyl CoA is formed from pyruvate by__________ reaction
Dehydration
Reduction
Oxidative decarboxylation
Dephosphorylation
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is not formed during the Krebs cycle?
Lactate
Isocitrate
Succinate
Both (a) and (b)
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
FAD is reduced in which of the reaction of the Kreb’s cycle?
Isocitrate to oxaloacetate
Succinyl CoA to Succinate
Fumarate to malate
Succinate to fumarate
Tags
NGSS.HS-LS1-7
NGSS.HS-LS2-3
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