2024 Unit 3 Biochem, Cells, and Cell Transport

Which table shows the correct pairing of each organic molecule with its function?

• 
• 
• 
• 

Use the Venn diagram to compare and contrast two macromolecules.

What is the best title for the letters P and Q?

• P: Lipids

  Q: Carbohydrates

• 
  P: Carbohydrates

  Q: Lipids

• P: Lipds

  Q: Nucleic Acids

• P: Nucleic Acids

  Q: Proteins

Which statement about enzymes is true?

• • Enzymes have an active site that has a complementary shape to a substrate.

• • Enzymes have an active site that binds to a variety of different substrates.

• • Enzymes are not affected by abiotic factors in the environment.

• • Enzymes are not affected by biotic factors in the environment.

Based upon the two graphs, what is the best temperature and pH for trypsin activity?

• • 37°C and a pH of 8

• • 37°C and a pH of 10

• • 59°C and a pH of 8

• • 59°C and a pH of 10

The diagram shows a model that represents steps during the process of enzyme activity.

Which statement is true about the model?

• • T represents the product, while M and N represent the substrates.

• • M and N represent the substrates, and T represents the enzyme.

• • T represents the enzyme, while M and N represent the products.

• • M and T represent the substrates, and N represents the product.

A biologist claims that a particular compound in the human body is broken down by an enzyme, and he identifies the energy difference between the catalyzed and uncatalyzed biochemical pathways as evidence of this fact. The scientist presents this evidence in graphical form. Which letter represents the activation energy of the enzyme catalyzed biochemical pathway?

• W

• X

• Y

• Z

Which pair of molecules is primarily responsible for energy storage in the human body?

• • carbohydrates and nucleic acids

• • nucleic acids and proteins

• • lipids and carbohydrates

• • proteins and lipids

A student listed some functions for which biomolecules are required.

Which functions are performed by fat?

• • 1, 2, and 4

• • 1, 3, and 4

• • 2, 3, and 4

• • 1, 2, and 3

Biological macromolecules have characteristic structures usually related to the function of the molecules.

What is the function of the macromolecule shown?

• • to transport oxygen in the blood to cells

• • to code for hereditary genetic information

• • to make up most of the structure of plasma membranes

• • to store energy for the cell to use in active transport

Use the diagram of a plant cell to answer the question.

For the process of photosynthesis, the arrow labeled A would most likely be pointing to what organelle?

• • the nucleus

• • the mitochondria

• • the chloroplast

• • the cell wall