Krebs Cycle & Electron Transport Chain

Where Aerobic Respiration of Pyruvate Occurs

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The aerobic respiration of pyruvate occurs within the:

Lysosomes

Golgi bodies

Cytoplasm

Mitochondria

Nucleus

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Naming the Cycle That Breaks Down Acetate

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With the aid of a complex of enzymes found in the mitochondrial matrix, acetate is broken down through a long series of chemical reactions known as:

Oxidation

Deamination

The mitochondrial cycle

Osmosis

The Krebs cycle

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What Enters the Krebs Cycle

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Based on the diagram, what molecule, formed when coenzyme A attaches to acetate, enters the Krebs cycle?

NADH2

Pyruvate

ATP

Acetyl-CoA

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Key Byproducts of the Krebs Cycle

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During the Krebs cycle, the most important byproducts are ATP and several hydrogen-carrier molecules, including (1) and some (2).

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lactate

NADH

FADH2

pyruvate

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Naming the Final Phase of Aerobic Respiration

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In the final stage of glucose oxidation, high-energy electrons are passed in a controlled series of steps to lower-energy-level electron carriers, with a small amount of energy released at each step to form ATP. This phase of aerobic respiration is known as:

The tricarboxylic acid cycle

The Krebs cycle

Anaerobic fermentation

The citric acid cycle

Oxidative phosphorylation

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Naming the Series of Electron Carriers

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The NADH and FADH2 released during the Krebs cycle are transported to a series of electron carriers in the cristae of the mitochondria. What is this series of carriers called?

The citric acid cycle

Deamination

Amination

The tricarboxylic cycle

The electron transport chain

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What Happens to Electrons at the End of the Chain

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At the end of the electron transport chain, electrons are accepted by (1) atoms, which combine with hydrogen ions to produce (2).

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carbon dioxide

nitrogen

water

oxygen

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The Iron-Containing Carrier Proteins

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What are the iron-containing protein molecules that make up the main components of the electron transport chain called?

Coenzymes

Chromatids

Cytokines

Cytochromes

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ATP Yield with the Krebs Cycle

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True or False: The development of the Krebs cycle increased the total number of ATPs that could be produced from glucose breakdown to 38.

True

False

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The Overall Aerobic Respiration Equation

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Which equation correctly summarizes aerobic respiration?

\(\text{C}_6\text{H}_{12}\text{O}_6 \rightarrow 2\text{C}_2\text{H}_5\text{OH} + 2\text{CO}_2\)

\(\text{C}_6\text{H}_{12}\text{O}_6 + 6\text{O}_2 \rightarrow 6\text{CO}_2 + 6\text{H}_2\text{O} + \text{energy}\)

\(\text{C}_6\text{H}_{12}\text{O}_6 \rightarrow 2\text{C}_2\text{H}_5\text{OH} + 2\text{CO}_2\)

\(6\text{CO}_2 + 6\text{H}_2\text{O} \rightarrow \text{C}_6\text{H}_{12}\text{O}_6 + 6\text{O}_2\)

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Classify: Krebs Cycle or Electron Transport Chain

2 pts

Sort each description into the correct stage of aerobic respiration

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Where Aerobic Respiration of Pyruvate Occurs

Correct Answer

Explanation

Naming the Cycle That Breaks Down Acetate

Correct Answer

Explanation

What Enters the Krebs Cycle

Correct Answer

Explanation

Key Byproducts of the Krebs Cycle

Correct Answer

Explanation

Naming the Final Phase of Aerobic Respiration

Correct Answer

Explanation

Naming the Series of Electron Carriers

Correct Answer

Explanation

What Happens to Electrons at the End of the Chain

Correct Answer

Explanation

The Iron-Containing Carrier Proteins

Correct Answer

Explanation

ATP Yield with the Krebs Cycle

Correct Answer

Explanation

The Overall Aerobic Respiration Equation

Correct Answer

Explanation

Classify: Krebs Cycle or Electron Transport Chain

Sort each description into the correct stage of aerobic respiration

drag and drop the selected option to the right place

Correct Answer

Explanation

Quran Recitation

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