Biomolecules and Enzymes STAAR Review

Enzymes perform which of the following functions within living cells?

• inhibiting the translation of proteins

• providing structural stability

• transmitting ultraviolet rays

• catalyzing chemical reactions

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The graph shows how enzymes affect reactions in cells. Which statement best summarizes the information shown in the graph?

• Enzymes increase the energy of the reactants.

• Enzymes decrease the energy level of the products.

• Enzyme decrease the activation energy of the reaction.

• Enzymes reverse the direction of the reaction.

An enzyme speeds up a reaction by

• lowering the activation energy.

• raising the activation energy.

• releasing energy.

• absorbing energy.

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The main function of a carbohydrate is

• long term energy storage

• stores genetic information

• short term energy storage

• regulates and controls all body proccesses

For enzymes to work properly, they must specifically fit a specific substrate at the active site. What factors change the shape of an enzyme making it not work?

• excessive heat

• change in pH

• amount of enzymes

• amount of substrates

What biomolecule do enzymes belong to? 

• Carbohydrate

• Lipid

• Nucleic Acid

• Protein

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This model shows what feature that is important to understand about an enzyme?

• How an enzyme can bond two monomers to create a polymer

• How an enzyme can break down a polymer molecule to form monomers

• How an enzyme's active site fits the substrate specifically

• How any enzyme can break any kind of molecule

The picture shown shows which class of biomolecule?

• Protein

• Nucleic Acid

• Carbohydrate

• Lipid

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Which of the following is NOT a function of lipids?

• Long-term energy storage

• Short-term energy storage

• Insulation

• Waterproof coverings

Which describes the functions of proteins in living things?

• structural, transport, signaling, catalysts, etc.

• stores and transmits genetic information

• stores energy and makes up cell membranes

• quick energy and forming cell structure

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