Understanding Enzymes and Macromolecules

What is the basic building block of enzymes?

• Amino acids

• Nucleotides

• Monosaccharides

• Fatty acids

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Which part of the enzyme is responsible for its catalytic activity?

• Substrate

• Active site

• Inhibitor

• Coenzyme

Enzymes are classified as which type of macromolecule?

• Carbohydrates

• Lipids

• Proteins

• Nucleic acids

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What is the role of enzymes in biological reactions?

• They increase the activation energy required.

• They decrease the activation energy required.

• They are consumed in the reaction.

• They act as reactants.

Which of the following best describes lactose intolerance?

• An inability to digest proteins

• An inability to digest lactose due to lack of lactase

• An inability to digest fats

• An inability to digest glucose

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How does the structure of an enzyme relate to its function?

• The enzyme's structure is unrelated to its function.

• The enzyme's structure determines its specificity for substrates.

• The enzyme's structure is flexible and changes with each reaction.

• The enzyme's structure is identical for all enzymes.

Explain why enzymes are specific to their substrates.

• Enzymes have a flexible active site that adapts to any substrate.

• Enzymes have a specific active site shape that only fits certain substrates.

• Enzymes are specific because they are made of nucleotides.

• Enzymes are specific because they are consumed in the reaction.

What happens to an enzyme when it is denatured?

• It becomes more active.

• It loses its specific shape and function.

• It becomes a different enzyme.

• It gains additional active sites.

Which of the following is a common symptom of lactose intolerance?

• Increased energy levels

• Digestive discomfort after consuming dairy

• Enhanced protein digestion

• Improved lactose digestion

Which macromolecule is primarily responsible for storing genetic information?

• Proteins

• Lipids

• Carbohydrates

• Nucleic acids

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NGSS.HS-LS3-1

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