Photosynthesis

Mr. Anderson explains photosynthesis, highlighting its importance in providing oxygen and food. He describes the structure of chloroplasts, the role of pigments, and the process of light absorption. The video covers the light-dependent reactions and the Calvin cycle, detailing how plants convert light, water, and carbon dioxide into glucose and oxygen. It also addresses photorespiration and how certain plants adapt to hot environments through CAM and C4 pathways.

What is the primary site of photosynthesis in eukaryotic cells?

• Ribosome

• Nucleus

• Chloroplast

• Mitochondria

Which pigment is primarily responsible for the green color of plants?

• Chlorophyll A

• Xanthophyll

• Carotene

• Anthocyanin

Which of the following is NOT a reactant in the photosynthesis equation?

• Water

• Light

• Oxygen

• Carbon Dioxide

Where do the light-dependent reactions of photosynthesis occur?

• Stroma

• Thylakoid Membrane

• Cytoplasm

• Nucleus

What is the waste product of the light-dependent reactions?

• ATP

• Oxygen

• Carbon Dioxide

• Glucose

What is the main purpose of the Calvin cycle?

• To produce oxygen

• To generate ATP

• To fix carbon into glucose

• To absorb light

What is the role of RuBisCo in the Calvin cycle?

• It transports electrons

• It absorbs light

• It splits water molecules

• It fixes carbon dioxide

What problem does photorespiration pose for plants?

• It enhances oxygen production

• It produces a non-useful chemical

• It increases water loss

• It accelerates glucose synthesis

How do CAM plants adapt to hot environments?

• By increasing oxygen production

• By opening stomata during the day

• By storing carbon dioxide as malic acid at night

• By using more water

Which type of plant uses a four-carbon molecule to adapt to hot environments?

• C3 plants

• CAM plants

• Aquatic plants

• C4 plants