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If photosynthesis and respiration are almost symmetrical processes, how is energy lost in the process of converting sugar back into ATP?

Energy is lost as heat during glycolysis and respiration.

The anaerobic breakdown of glucose is called:


If glucose is metabolized under completely anaerobic conditions, then pyruvate:

is converted by fermentation to CO2 and ethanol or to lactate.

All of the following are true statements about ATP EXCEPT that it is:

synthesized only within mitochondria.

The main function of cellular respiration is to produce:


If no oxygen is available to a cell, then the net ATP production resulting from the metabolism of a single glucose molecule is:

two ATP molecules

Which event occurs in the fluid portion of the cytoplasm of a cell undergoing glucose metabolism?


What are the net products of glycolysis?

two ATP, two NADH, and two pyruvate

What does NADH contain that is useful to a cell?

high-energy electrons

How many of the carbons originally present in glucose continue to other reactions after glycolysis?

Six carbons are left in pyruvate molecules.

During glycolysis, what is the net gain of ATP molecules produced from one glucose molecule?


Select the correct sequence of steps as energy is extracted from glucose during cellular respiration.

glycolysis → acetyl CoA → citric acid cycle → electron transport chain

What is the correct general equation for cellular respiration?

C6H12O6 + 6 O2 → 6 CO2 + 6 H2O + ATP energy

Which of the following processes takes place in the cytosol of a eukaryotic cell?


In what organelle would you find acetyl CoA formation, the citric acid cycle, and the electron transport chain?


Which statement describes glycolysis?

This process splits glucose in half and produces 2 ATPs for each glucose.

Which statement describes the citric acid cycle?

This process produces some ATP and carbon dioxide in the mitochondrion.

Which statement describes the electron transport chain?

This process uses energy captured from electrons flowing to oxygen to produce most of the ATPs in cellular respiration

Where is the majority of the usable energy found at the completion of glycolysis, acetyl CoA formation, and the Krebs cycle?


What is the purpose of the electron transport chain?

To use energy from the passing of electrons in electron carriers into a high concentration of hydrogen ions

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