Cellular Respiration and The Chemistry of Cellular Respiration

What is the primary purpose of respiration in living organisms?

• To produce oxygen

• To produce energy

• To produce carbon dioxide

• To produce water

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NGSS.HS-LS1-7

Which of the following is a byproduct of aerobic respiration?

• Lactic acid

• Ethanol

• Carbon dioxide

• Methane

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NGSS.HS-LS2-3

Where in the cell does aerobic respiration primarily occur?

• Nucleus

• Mitochondria

• Ribosome

• Cytoplasm

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NGSS.HS-LS1-7

Which molecule is the final electron acceptor in the electron transport chain during aerobic respiration?

• Carbon dioxide

• Oxygen

• Water

• Glucose

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NGSS.HS-LS1-7

Does the following equation refer to photosynthesis or cellular respiration? glucose + oxygen --> carbon dioxide + water + energy

• photosynthesis

• cellular respiration

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NGSS.HS-LS2-5

What is the equation for cellular respiration?

(you do not need to use subscripts and it doesn't have to be balanced!)

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NGSS.HS-LS1-7

Where does Glycolysis occur inside the cell? (first step in the overall process)

• Cytoplasm

• Mitochondria

• Chloroplast

• Nucleus

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NGSS.HS-LS1-7

Label the Diagram of the first stage of aerobic cellular respiration:

c

d

a

b

2 ATP

Glycolysis

2 Pyruvate

Glucose

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NGSS.HS-LS1-7

Label the Diagram of the first stage of cellular respiration:

c

d

a

b

Glycolysis

2 Pyruvate

Glucose

2 ATP

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NGSS.HS-LS1-7

The first stage of cellular respiration is glycolysis, which literally means

“sugar splitting.” Look at the diagram.

When glucose, a 6-carbon sugar, is broken down during glycolysis, what product forms?

• 2 molecules of lactic acid, C3H6O3

• 3 molecules of ethanol, C2H5OH

• 2 molecules of pyruvic acid, C3H4O3

• 6 molecules of carbon dioxide, CO2

Answer explanation

During glycolysis, glucose is broken down into 2 molecules of pyruvic acid, C3H4O3, as the end product.

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HS-LS1-7