Test 1 (Unit 1) Fall 2025

(Unit 1) The macromolecules primarily used for energy are ___________.

• A. carbohydrates and lipids

• B. lipids only

• C. enzymes

• D. proteins and lipids

Tags

NGSS.MS-LS1-7

What happens to an enzyme/catalyst after being used in a chemical reaction?

• More catalyst molecules are made.

• It combines with the product.

• It is destroyed.

• It is not changed and can be reused.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which macromolecule is produced in the chloroplast through photosynthesis and used in the mitochondria to produce energy through cellular respiration?

• Protein

• Water

• Nucleic Acid

• Lipid

• Carbohydrate

Tags

NGSS.MS-LS1-6

NGSS.MS-LS1-7

Which of the following statements about carbohydrates is NOT true?

• Carbohydrates are found in plant cell walls in the form of cellulose.

• Carbohydrates are made up of a large amount of nitrogen.

• Carbohydrates' monomers are monosaccharides.

• Carbohydrates are used for quick energy.

Dr. Quinn, M.D., is reviewing a patient's files. The patient has high levels of triglycerides in her blood, xanthomas (fatty deposits on her skin), and experiences difficulty after eating foods like butter and cheese. After considering the symptoms and reviewing the chart below, which enzyme is the patient most likely lacking?

• Sucrase

• Polymerase

• Lipase

• Protease

Which of the following statements best describes enzymes?

• A. Enzymes are carbohydrates that store energy for cells.

• B. Enzymes are a type of protein and biological catalyst that speed up chemical reactions by lowering activation energy.

• C. Enzymes are lipids that help in the structure of cell membranes.

• D. Enzymes are nucleic acids that carry genetic information.

(Unit 1) Fireflies produce light through a process called bioluminescence. In their tails, cells make many luciferase enzymes. Luciferase attaches to a chemical called luciferin. This helps speed up a reaction that combines luciferin and oxygen to make oxyluciferin. This reaction uses energy and produces light. Using what you know about enzymes and chemical reactions, determine which of the following best describes how the luciferase enzyme speeds up the chemical reaction?

• Luciferase increases the number of sites on luciferin that must bind to oxygen.

• Luciferase decreases the temperature of the environment inside the body of the firefly.

• Luciferase decreases the amount of energy required for the reaction to start.

• Luciferase increases the amount of time the light is visible.

Tags

NGSS.HS-PS1-4

NGSS.HS-PS1-5

Using the graph above, determine which enzyme would be more effective in a stomach filled with hydrochloric acid that has a pH of 2?

• Both Pepsin and Trypsin

• Trypsin only

• Pepsin only

• Neither enzyme works at a pH of 2.

Tags

NGSS.HS-PS1-5

Which organelle is responsible for cellular respiration (breaking down glucose into ATP energy) in cells?

• Chloroplast

• Mitochondria

• Lysosome

• Ribosome

Tags

NGSS.MS-LS1-7

You are in the lab observing various plant and animal cells provided by your teacher. As you examine the cell specimen below, you quickly identify it as a plant cell due to its boxy shape, caused by the presence of a cell wall, and the large "pocket" within the cell. This "pocket" helps the plant cell maintain turgor pressure, store water, nutrients, and waste products. What is the name of this organelle, which plays a key role in storage and maintaining cell structure in plant cells?

• Large central vacuole

• Mitochondrion

• Nucleus

• Chloroplast

Tags

NGSS.MS-LS1-2