How Organisms Obtain Energy

What does the 1st Law of Thermodynamics state about energy?

• Energy can be created and destroyed

• Energy can be created but not destroyed

• Energy cannot be created nor destroyed, only transferred or transformed

• Energy can be destroyed but not created

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What is entropy a measure of in a system?

• Order and stability

• Disorder or instability

• Energy efficiency

• Temperature

Entropy is related to which of the following?

• Stability

• Disorder

• Energy gain

• Temperature increase

What is released during the breakdown of larger molecules in catabolism?

• Oxygen

• Energy

• Water

• Carbon dioxide

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In photosynthesis, what is converted into stored chemical energy?

• Heat energy

• Light energy

• Sound energy

• Mechanical energy

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What are the reactants in the photosynthesis process?

• Oxygen and glucose

• Carbon dioxide and water

• Nitrogen and hydrogen

• Methane and oxygen

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What is the role of light in photosynthesis?

• It acts as a reactant

• It provides energy

• It is a byproduct

• It is not involved

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In cellular respiration, what is broken down to release energy?

• Proteins

• Lipids

• Molecules

• Nucleic Acids

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What is the role of heterotrophs in cellular respiration?

• They produce glucose.

• They break down molecules to release energy.

• They convert sunlight into energy.

• They synthesize proteins.

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What is the main purpose of cellular respiration?

• To produce glucose

• To release energy

• To store energy

• To create proteins

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