Enzymes & Biochemical Reactions

Multiple Choice

Which of the following factors can influence the speed of a chemical reaction catalyzed by an enzyme?

• Temperature

• Enzyme concentration

• pH level

• All of the above

Open Ended

Why are enzymes important for biochemical reactions in living organisms?

Multiple Select

Select all that are true about metabolism.

• It includes all chemical reactions in a cell

• It only provides energy for movement

• It creates key molecules needed for life

• It only occurs in animals

Multiple Choice

Which of the following statements about chemical reactions in metabolism is correct?

• Breaking a bond releases energy, forming a bond absorbs energy

• Breaking a bond absorbs energy, forming a bond releases energy

• Both breaking and forming bonds absorb energy

• Both breaking and forming bonds release energy

Open Ended

Explain how the law of conservation of energy applies to metabolic reactions in living organisms.

Open Ended

Describe how carbon, hydrogen, and oxygen from sugar molecules can combine with other elements to form essential molecules for life.

Fill in the Blank

The amount of energy needed to make a chemical reaction start is called ___

Multiple Choice

What is the main difference between catabolic and anabolic reactions in metabolism?

• Catabolic reactions build larger molecules, anabolic reactions break them down

• Catabolic reactions require energy, anabolic reactions release energy

• Catabolic reactions break down molecules and release energy, anabolic reactions build molecules and consume energy

• Catabolic reactions only occur in plants, anabolic reactions only occur in animals

Open Ended

Explain how energy is transferred between catabolic and anabolic reactions in cells.

Multiple Choice

Which of the following best describes the relationship between catabolic and anabolic pathways in metabolic processes?

• Catabolic pathways build complex molecules using energy from anabolic pathways.

• Anabolic pathways break down complex molecules to release energy for catabolic pathways.

• Catabolic pathways release energy that is used to drive anabolic pathways.

• Anabolic pathways release energy that is used to drive catabolic pathways.

Multiple Choice

What is happening in this reaction?

• A molecule is structurally rearranged without changing its contents.

• Complex molecules are combined to to form simpler molecules.

• Simpler molecules are combined to from complex molecules.

• Complex molecules are broken down to form simpler molecules.

• Simpler molecules are broken down to from complex molecules.

Fill in the Blank

Is this reaction anabolic, catabolic, or neither?

Fill in the Blank

In a chemical reaction, the substances that are changed during the reaction are called ___.

Multiple Choice

Which of the following statements about reactants and products in a chemical reaction is correct?

• Reactants are made by a chemical reaction, products are changed during a chemical reaction.

• Reactants are changed during a chemical reaction, products are made by a chemical reaction.

• Reactants and products are both unchanged during a chemical reaction.

• Products are always more complex than reactants.

Multiple Choice

Which of the following best describes an endothermic reaction?

• It absorbs energy in the form of heat or light.

• It releases energy in the form of heat or light.

• It produces only light energy.

• It does not involve energy changes.

​https://www.youtube.com/watch?v=-xgl-S7vH_k

Fill in the Blank

Enzymes are also known as ___.

Multiple Choice

Which of the following statements about enzymes is correct?

• Enzymes lower the activation energy of biochemical reactions.

• Enzymes are permanently altered after a reaction.

• Enzymes slow down metabolic reactions.

• Enzymes are mostly carbohydrates.

Multiple Select

Select all statements that are true about enzymes.

• Enzymes bind to reactants called substrates.

• Enzymes are not changed in a reaction and can be reused.

• Enzymes are critical for the regulation of life’s processes.

• Enzymes are only found in plants.

Multiple Choice

Which of the following best describes the specificity of enzymes?

• Enzymes can bind to any molecule.

• Enzymes have an active site that fits only one specific substrate.

• Enzymes can react with multiple substrates at once.

• Enzymes do not require a substrate to function.

Multiple Choice

What happens to an enzyme's activity when its active site is deformed due to environmental changes?

• The enzyme becomes more active.

• The enzyme loses its biological activity.

• The enzyme changes its substrate.

• The enzyme produces more products.

Open Ended

What are some ways you think we denature proteins on a regular basis without even knowing it?

Fill in the Blank

Increasing the ___ of a reaction increases the rate because molecules move faster and collide more often.

Multiple Select

Which of the following factors can speed up or slow down the rate of a chemical reaction? Select all that apply.

• Substrate concentration

• Catalysts

• Competitive inhibitors

• All of the above

Multiple Choice

Which of the following is a factor that can influence the speed of a chemical reaction catalyzed by an enzyme?

• Temperature

• Color of the enzyme

• Shape of the container

• Amount of light in the room

Open Ended

Reflecting on today's lesson about enzymes and biochemical reactions, what is one question you still have or something you would like to learn more about?