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• What is the purpose of this video on photosynthesis?

  To describe light harvesting systems and photosystems
• What are the two sets of reactions in photosynthesis?

  Light dependent and light independent reactions
• What compounds are produced in the light dependent reactions?

  ATP and reduced NADP
• What is formed from carbon dioxide in the light independent reactions?

  Glucose
• Where do the light dependent reactions take place?

  In the thylakoid membranes
• What is the role of chlorophyll in photosynthesis?

  It absorbs visible light
• Which form of chlorophyll is mainly focused on in this video?

  Chlorophyll a
• What wavelengths of light does chlorophyll a primarily absorb?

  Red and blue light
• Why do plants appear green?

  Because chlorophyll a does not absorb green light
• What is the central molecule in the light dependent reactions?

  Chlorophyll a
• What are accessory pigments?

  Other pigments that assist chlorophyll a
• What do accessory pigments do in photosynthesis?

  They absorb light energy and pass it to chlorophyll a
• What is the light harvesting system also called?

  Antenna complex
• What are the two types of photosystems mentioned?

  Photosystem 1 and Photosystem 2
• What wavelength does Photosystem 1 absorb?

  700 nanometers
• What wavelength does Photosystem 2 absorb?

  680 nanometers
• What happens to electrons in chlorophyll a when light energy is absorbed?

  They move to a higher energy level
• What is photo ionization?

  When electrons leave the chlorophyll a molecule
• What will the excited electrons be used for in the light dependent reactions?

  To make ATP and reduced NADP
• What are the key components of the light dependent reactions?

  • Thylakoid membranes
  • Chlorophyll a
  • Accessory pigments
  • Reaction center
  • Light harvesting system
  • Photosystems 1 and 2
• How do the light harvesting system and reaction center work together?

  • Light harvesting system absorbs light
  • Energy is transferred to reaction center
  • Reaction center uses energy to excite electrons
• What is the significance of having different accessory pigments?

  • Absorb different wavelengths of light
  • Maximize light energy harvesting
  • Ensure efficient photosynthesis