Flow of Energy Unit Quiz

What is the definition of metabolism?

• The breaking and forming of bonds between substances during chemical changes.

• All of the chemical reactions within each cell of an organism.

• The release of energy as heat and light.

• The absorption of energy during chemical reactions.

Which of the following is a function of metabolism in cells?

• Provide energy for life’s processes

• Absorb energy from the environment

• Release energy as heat only

• Break down only carbohydrates

What happens during a chemical reaction?

• Only energy is released

• Bonds between substances are broken and formed

• Only heat is produced

• Molecules are created without energy change

According to the law of conservation of energy, what happens to energy in a system?

• Energy is lost forever

• Energy changes forms but is not lost

• Energy is only absorbed

• Energy is only released as light

Which process requires energy to be absorbed?

• Forming a bond

• Breaking a bond

• Releasing heat

• Creating molecules

If a chemical reaction forms a bond, what happens to energy?

• Energy is absorbed

• Energy is released

• Energy is lost

• Energy is unchanged

Explain how the law of conservation of energy applies to chemical reactions, using an example of energy changing forms.

• Energy is destroyed during chemical reactions.

• Energy is created during chemical reactions.

• Energy may be released as heat or light, but is not lost.

• Energy is only absorbed and never released.

Which type of biochemical reaction breaks down larger molecules into simpler compounds and releases energy?

• Anabolic

• Catabolic

• Endergonic

• Activation

What is the term for the amount of energy needed to make a chemical reaction start?

• Catabolic energy

• Anabolic energy

• Activation energy

• Endergonic energy

Which statement best describes an anabolic reaction?

• It breaks down molecules and releases energy.

• It builds larger molecules from smaller ones and requires energy.

• It does not require energy to happen.

• It is always exergonic.