What are the four most common elements in living things?

• Carbon, Hydrogen, Oxygen, and Nitrogen

• Carbon, Nitrogen, Sulfur, and Hydrogen

• Carbon, Hydrogen, Fluorine, and Silicon

• Carbon, Oxygen, Nitrogen, and Iodine

Which statement BEST compares a function of proteins and lipids in a human cell?

• Proteins allow for the transport of certain molecules into and out of the cell while lipids store genetic information for cells.

• Proteins catalyze chemical reactions inside the cell while lipids allow for the transport of certain molecules into and out of the cell.

• Proteins provide energy for cellular processes while lipids catalyze chemical reactions inside the cell.

• Proteins store genetic information for cells while lipids provide energy for cellular processes.

Tags

NGSS.HS-LS2-3

A student makes a Venn diagram to compare the functions of carbohydrates and lipids.

Which cellular function of carbohydrates and lipids should be placed in the shared section of the Venn diagram?

• Catalyst for chemical reactions.

• Structural support of cell walls.

• Hormone production.

• Energy storage.

A table of four types of carbohydrates is shown.

Which list correctly matches the functions to the types of carbohydrates?

• Energy: glycogen and chitin

  Structure: Cellulose and starch

• Energy: glycogen and starch

  Structure: Cellulose and chitin

• Energy: Cellulose and chitin

  Structure: Glycogen and starch

• Energy: Cellulose and starch

  Structure: Glycogen and chitin

Starch, Cellulose, and Glycogen, are examples of which of the following biomolecule?

• Lipids

• Carbohydrates

• Proteins

• Nucleic Acids

Which of the following correctly matches the enzyme to its substrate?

• Pepsin: Starch

  Amylase: Protein

• Lipase: Fats

  Pepsin: Proteins

• Amylase: Starch

  Pepsin: Lipids

• Pepsin: Sugar

  Protease: Lipids

Look at the illustration and answer the question that follows.

What is the role of enzyme in the reaction?

• Enzyme slows down the reaction.

• Enzyme does not affect the reaction.

• Enzyme lowers the activation energy required to complete the reaction.

• Enzyme increases the activation energy required to complete the reaction.

Tags

NGSS.HS-PS1-4

The graph shows the reaction rate for an enzyme across a range of temperatures and pH.

Based on these data, this enzymes functions best at what temperature and pH?

• Temperature of 27 °C and a pH of 4.

• Temperature of 40 °C and a pH of 8.

• Temperature of 50 °C and a pH of 10.

• Temperature of 37 °C and a pH of 6.

Tags

NGSS.HS-PS1-5

A model of an enzyme and its corresponding substrate is shown.

Which of the following models best represents the molecules at the end of the reaction?

• 
• 
• 
• 

Look at the two structures of biomolecules shown.

Which of the following structures is a nucleic acid?

• Molecule Y

• Molecule X

• Both of the structures are nucleic acids.

• None of the structures are nucleic acids.