Photosynthesis Part 1

What is the main difference between autotrophic and heterotrophic nutrition?

• Autotrophic organisms obtain energy from other organisms, while heterotrophic organisms produce their own energy.

• Autotrophic organisms produce their own energy through photosynthesis, while heterotrophic organisms obtain energy from other organisms.

• Both autotrophic and heterotrophic organisms produce their own energy through photosynthesis.

• Autotrophic organisms obtain energy from sunlight, while heterotrophic organisms obtain energy from water.

Which of the following best describes the structure of a chloroplast?

• A single membrane with no internal compartments.

• A double membrane with internal compartments called thylakoids and stroma.

• A triple membrane with internal compartments called mitochondria.

• A single membrane with internal compartments called ribosomes.

What is the summary equation for photosynthesis?

What are the two main stages of photosynthesis?

• Glycolysis and the Krebs cycle.

• Light-dependent reactions and the Calvin cycle.

• Electron transport chain and fermentation.

• Photolysis and oxidative phosphorylation.

How does an action spectrum differ from an absorption spectrum?

• An action spectrum shows the wavelengths of light absorbed by pigments, while an absorption spectrum shows the rate of photosynthesis.

• An action spectrum shows the rate of photosynthesis at different wavelengths, while an absorption spectrum shows the wavelengths of light absorbed by pigments.

• Both spectra show the rate of photosynthesis at different wavelengths.

• Both spectra show the wavelengths of light absorbed by pigments.

What role do carotenoids play in the light-harvesting complex?

• They absorb green light and reflect red light.

• They absorb excess energy and protect chlorophyll from damage.

• They are the primary pigments responsible for photosynthesis.

• They convert light energy into chemical energy.

Which wavelengths of light are most effective for photosynthesis?

• Green and yellow.

• Red and blue.

• Ultraviolet and infrared.

• Orange and violet.

What happens when chlorophyll-a in an intact chloroplast absorbs photons?

• It releases oxygen as a by-product.

• It converts light energy into chemical energy.

• It emits light as fluorescence.

• It breaks down into simpler molecules.

Which of the following is NOT a component of a chloroplast?

• Thylakoid.

• Stroma.

• Cristae.

• Granum.

What is the primary function of the Calvin cycle?

• To capture light energy and convert it into ATP and NADPH.

• To fix carbon dioxide into organic molecules.

• To release oxygen as a by-product.

• To break down glucose into pyruvate.