Biology Cellular Respiration Flashcards

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Questions and Answers

What are the 3 phases of the cellular respiration process?

Glycolysis, the Krebs Cycle, the electron transport chain

Where in the cell does the glycolysis part of cellular respiration occur?

Cytoplasm

Where in the cell does the Krebs (Citric Acid) cycle part of cellular respiration occur?

Mitochondrial matrix

Where in the cell does the electron transport part of cellular respiration occur?

Inner membrane of mitochondria Signup and view all the answers

How many ATP (net) are made in the glycolysis part of cellular respiration?

2 ATP Signup and view all the answers

How many ATP are made in the Krebs cycle part of cellular respiration?

2 ATP Signup and view all the answers

How many ATP are made in the electron transport part of cellular respiration?

34 ATP Signup and view all the answers

In which phase of cellular respiration is carbon dioxide made?

The Krebs Cycle Signup and view all the answers

In which phase of cellular respiration is water made?

Electron transport chain Signup and view all the answers

In which phase of cellular respiration is oxygen a substrate?

Electron transport chain Signup and view all the answers

In which phase of cellular respiration is glucose a substrate?

Glycolysis Signup and view all the answers

On average, how many ATP can be made from each NADH during the electron transport process?

3 ATP Signup and view all the answers

On average, how many ATP can be made from each FADH2 during the electron transport process?

2 ATP Signup and view all the answers

What would happen to the cellular respiration process if the enzyme for one step of the process were missing or defective?

The process beyond that point would not function Signup and view all the answers

What happens to the high-energy electrons (and hydrogen) held by NADH if there is no O2 present?

The pyruvic acid would take the electrons back without the oxygen Signup and view all the answers

What is the overall reaction for fermentation in yeast?

Glucose → Ethyl alcohol + CO2 + 2 ATP + Heat Signup and view all the answers

What is the overall reaction for lactic acid fermentation?

Glucose → Lactic Acid + 2 ATP + Heat Signup and view all the answers

Study Notes

Phases of Cellular Respiration

Three main phases are glycolysis, the Krebs Cycle, and the electron transport chain.

Location of Processes

Glycolysis occurs in the cytoplasm.
The Krebs Cycle takes place in the mitochondrial matrix.
The electron transport chain is located in the inner membrane of mitochondria.

ATP Production

Glycolysis yields a net gain of 2 ATP.
The Krebs Cycle also produces 2 ATP.
The electron transport chain generates 34 ATP, making it the most productive phase.

Byproducts of Cellular Respiration

Carbon dioxide is produced during the Krebs Cycle.
Water is formed in the electron transport chain.

Substrates in Cellular Respiration

Glucose serves as the substrate in glycolysis.
Oxygen acts as a substrate in the electron transport chain.

NADH and FADH2

Each NADH can produce about 3 ATP in the electron transport chain.
Each FADH2 yields approximately 2 ATP during the process.

Enzyme Deficiency Impact

Missing or defective enzymes at any step of cellular respiration will halt processes beyond that point.

Anaerobic Conditions

In the absence of oxygen, pyruvic acid accepts high-energy electrons from NADH.

Fermentation Reactions

Yeast fermentation reaction: Glucose converts to ethyl alcohol, carbon dioxide, 2 ATP, and heat.
Lactic acid fermentation reaction: Glucose converts to lactic acid, 2 ATP, and heat.

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Description

Test your knowledge on cellular respiration with these flashcards. Learn about the three phases of the process, where glycolysis and the Krebs cycle occur, and other essential details related to cellular energy production.