Cellular Energy

Multiple Choice

The process by which cells use oxygen to produce energy from food is called?

• photosynthesis
• transpiration
• cellular respiration
• germination

Multiple Choice

Chlorophyll is:

• The substance that makes plants green.

• Found inside the chloroplast cells.

• Used to absorb energy from the sun.

• All of the above.

Multiple Choice

By which process do plants make their own food from carbon dioxide and water?

• cellular respiration
• transpiration
• chlorophyll
• photosynthesis

Open Ended

Describe how energy is transferred from the sun to animals in an ecosystem, based on the diagram.

Multiple Choice

Why is photosynthesis considered a crucial process for the flow of energy in an ecosystem?

• It produces oxygen for animals to breathe

• It converts radiant energy from the sun into chemical energy

• It helps animals grow faster

• It provides heat directly to animals

Multiple Choice

Which process captures energy from sunlight to make sugars that store chemical energy?

• Photosynthesis

• Respiration

• Fermentation

• Transpiration

Open Ended

Explain how the visible spectrum is related to photosynthesis in plants.

Multiple Select

Which of the following statements about pigments is/are correct?

• Pigments absorb light.

• All pigments absorb the same color of light.

• Different colors absorb different colors of light.

• Pigments are only found in animals.

Open Ended

Why do plants appear green even though chlorophyll absorbs mostly red and blue light?

Multiple Choice

Which structural feature is common to both chlorophyll a and chlorophyll b?

• Presence of a magnesium ion at the center

• A benzene ring

• A phosphate group

• A sulfur atom

Open Ended

Explain how the abundance of chlorophylls compared to other pigments affects the appearance of leaves throughout the year.

Multiple Choice

Which pigments become visible in plant leaves during the fall when chlorophylls are lost?

• Carotenoids

• Anthocyanins

• Xanthophylls

• Melanin

Multiple Select

Select all components that are found within a chloroplast.

• Thylakoid

• Stroma

• Nucleus

• Granum

Open Ended

Describe the role of the electron transport chain in the thylakoid membrane during photosynthesis.

Multiple Choice

Which structure within the chloroplast is primarily responsible for the light-dependent reactions of photosynthesis?

• Stroma

• Thylakoid

• Granum

• Outer membrane

Multiple Choice

Which of the following is the main product of the Calvin Cycle during photosynthesis?

• Oxygen

• Glucose

• ATP

• NADPH

Multiple Select

Which of the following statements about the light-dependent reactions is/are correct?

• They take place in the thylakoid membrane.

• Oxygen is released as a waste product.

• ATP and NADPH are produced.

• Glucose is produced directly.

Open Ended

Explain the role of chlorophyll in the light-dependent reactions of photosynthesis.

Open Ended

Describe the sequence of events that occurs in the electron transport chain during the light reactions of photosynthesis.

Multiple Choice

Which of the following statements about the Calvin Cycle (dark reactions) is correct?

• It requires sunlight to occur.

• It takes place in the stroma of the chloroplast.

• It produces oxygen as a byproduct.

• It uses energy from glucose to make ATP.

Open Ended

Explain how the Calvin Cycle uses the products of the light reactions to produce glucose.

Multiple Choice

Which molecules are required for the Calvin Cycle to produce glucose?

• Oxygen and ATP

• Carbon dioxide and NADPH

• Water and ADP

• Sunlight and glucose

Multiple Choice

What is the main purpose of the Calvin Cycle as shown in the diagram?

• To produce ATP from sunlight

• To convert carbon dioxide into glucose

• To release oxygen as a waste product

• To break down glucose for energy

Open Ended

Describe the relationship between light-dependent and light-independent reactions in photosynthesis.

Open Ended

Reflecting on the lesson, what questions do you still have about how photosynthesis and cellular respiration contribute to energy flow in ecosystems?

Multiple Choice

How does energy flow from the sun to animals in an ecosystem, as shown in the diagram?

• Through photosynthesis and cellular respiration

• Direct absorption by animals

• Animals produce energy from sunlight

• Energy is transferred only through heat