Unit 4 Test Review

What are the light-gathering molecules of the photosystems in photosynthesis?

• chlorophyll

• chloroplast

• cytochrome C

• thylakoids

Which of the following correctly describes how a diagram of cellular respiration would differ from a diagram of photosynthesis?

• The cellular-respiration diagram would show electromagnetic waves as the final product.

• The cellular-respiration diagram would show glucose as the main source of energy.

• The cellular-respiration diagram would show energy stored in large protein molecules.

• The cellular-respiration diagram would show water as the main source of chemical energy.

Which statement best describes the relationship between the products of photosynthesis and the reactants in cellular respiration?

• The products of photosynthesis serve as the reactants in cellular respiration to provide chemical energy.

• The products of photosynthesis combine with the reactants in cellular respiration to remove ATP from cells.

• The products of photosynthesis inhibit the reactants in cellular respiration in the presence of light.

• The products of photosynthesis change the structure of the reactants in cellular respiration in the presence of light.

Which of the following lists two requirements needed for the reactions of both photosynthesis and aerobic respiration?

• molecular oxygen and enzymes

• molecular oxygen and carbon dioxide

• electron transport system and enzymes

• electron transport system and molecular carbon dioxide

Analyze the graphic above. What are the chemicals represented by the Y?

• H₂O + O₂

• H₂O + CO₂

• C₆H₁₂O₆ + O₂

• C₆H₁₂O₆ + CO₂

Students placed yeast cells into a test tube. They added sugar solution to the test tube and placed a rubber stopper on the end. They left the test tube at room temperature to examine the next day. Students researched yeast and discovered that yeast are single-celled fungi that contain many mitochondria, but chloroplasts are absent. The teacher asks students to form a hypothesis to address the experimental question, “What gas will the yeast produce in the test tube over the next 24 hours?”

Based on this information, what hypothesis is valid?

• Carbon dioxide will be produced due to cellular respiration.

• Carbon dioxide will be produced due to photosynthesis.

• Oxygen will be produced due to cellular respiration.

• Oxygen will be produced due to photosynthesis.

Students place a plant in a dark, windowless closet for two days. Which of these will help the plant maintain homeostasis?

• growing deeper roots

• using stored sugars

• decreasing stem size

• losing all of its leaves

Which product to reactant represents the intermediate reaction of Cellular Respiration?

• Glucose --> Pyruvate

• Pyruvate --> Acetyl CoA

• Acetyl CoA --> CO2

• Glucose --> Glucose-6-Phosphate

How many Net ATP are produced by the Electron Transport Chain in Cellular Respiration?

• 32

• 24

• 38

• 30

Ribulose biphosphate carboxylase is a chemical that aides in the process of photosynthesis. Ribulose biphosphate carboxylasebreaks down carbon dioxide and bonds carbon atoms together to begin the formation of sugars. Without ribulose biphosphate carboxylase, photosynthetic organisms would not be able to produce as much food. Even though ribulose biphosphate carboxylase is involved in assisting chemical reactions, its chemical structure is unchanged.

Based on the information about the function of ribulose biphosphate carboxylase, what is the best classification of the chemical?

• Carbohydrate

• Enzyme

• Lipid

• Nucleic Acid