Understanding Photosynthesis Concepts

Which organelle is primarily responsible for photosynthesis in plant cells?

• Mitochondrion

• Chloroplast

• Nucleus

• Ribosome

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

What pigment is mainly responsible for absorbing light energy during photosynthesis?

• Carotene

• Chlorophyll

• Xanthophyll

• Anthocyanin

Tags

NGSS.HS-LS1-5

Which of the following best describes an autotroph?

• An organism that obtains energy by consuming other organisms

• An organism that produces its own food from inorganic substances

• An organism that decomposes dead material

• An organism that lives in water

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

What is the main function of RuBisCo in the Calvin cycle?

• Absorbing sunlight

• Fixing carbon dioxide

• Splitting water molecules

• Transporting electrons

Tags

NGSS.HS-LS2-5

Which process occurs in the thylakoid membranes of the chloroplast?

• Calvin cycle

• Light-dependent reactions

• Glycolysis

• Krebs cycle

Tags

NGSS.HS-LS1-5

Which of the following is NOT a way ATP is produced in cells?

• Substrate-level phosphorylation

• Oxidative phosphorylation

• Photophosphorylation

• Hydrolysis

Which type of plant is adapted to minimize photorespiration by separating carbon fixation and the Calvin cycle in space?

• C3 plant

• C4 plant

• CAM plant

• Aquatic plant

What is the primary difference between light-dependent and light-independent reactions in photosynthesis?

• Light-dependent reactions require sunlight; light-independent reactions do not.

• Light-independent reactions produce oxygen; light-dependent reactions do not.

• Light-dependent reactions occur in the stroma; light-independent reactions occur in the thylakoid.

• Light-independent reactions split water; light-dependent reactions fix carbon.

Tags

NGSS.HS-LS1-5

Explain why pigments other than chlorophyll are important in photosynthesis.

• They store energy for the plant.

• They absorb different wavelengths of light, increasing the range of light used for photosynthesis.

• They transport water to the leaves.

• They provide structural support to the chloroplast.

Which statement best describes the role of photorespiration in plants?

• It increases the efficiency of photosynthesis.

• It occurs when RuBisCo fixes oxygen instead of carbon dioxide, reducing photosynthetic output.

• It produces ATP directly.

• It only occurs in CAM plants.