science

During cellular respiration, the covalent bonds of a molecule are broken down to form products. Which molecule is broken down?

ADP

carbon dioxide

water

sugar***

During cellular respiration, four total ATP are produced when pyruvic acid is created. What else is produced as a result of this reaction?

heat***

sugar

oxygen

water

Why does hydrogen bond so tightly to oxygen during cellular respiration?

It is more electronegative than oxygen.

It is not electronegative, but oxygen is.

It is less electronegative than oxygen.***

It is electronegative, but oxygen is not.

What is the byproduct of anaerobic respiration?

carbon dioxide

pyruvic acid

lactic acid***

oxygen

Which statement correctly describes what transpires during a chemical reaction?

A catalyst strengthens the bonds of the reactants increasing the activation energy.

A catalyst weakens the bonds of the reactants increasing the activation energy.

A catalyst strengthens the bonds of the reactants lowering the activation energy.

A catalyst weakens the bonds of the reactants lowering the activation energy.***

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