The Basics of Photosynthesis L3

• Autotroph - an organism that can produce its own food using light, water, carbon dioxide, or other chemicals.
• Oceanic Plankton - major contributor and producer of oxgen on Earth
• Heterotrophs - can't produce their own food, rely on other organisms like autotrophs.
• Plants that are not autotrophs - Dodder plant
• Why are plants green?

  Chlorophyll - green pigment
• Chloroplast - absorb light energy and convert it to chemical energy.
• In which part of the chloroplasts are the green pigments located at?

  Thylakoid
• What pigment in plants harvest sunlight and give green color to them?

  Chlorophyll
• Xanthophyll - yellow pigment
• Carotene - orange pigment
• Anthocyanin - purple pigment
• Carotenoids - are pigments that are either red, orange, or yellow.
• What are the molecules that carry "energy" from the light reactions to the Calvin Cycle?

  ATP and NADPH
• Where does the Dark reaction occur?

  Stroma
• What kind of plant cells contain abundant amount of chloroplasts?

  Mesophyll Cells
• Particularly where in the leaves does carbon dioxide get into?

  Stomata
• What part of the plant allows water to be absorbed?

  Roots
• What is the other term for dark reactions?

  Calvin cycle/Light independent reactions
• Aside from plants, what other organisms can perform photosynthesis?

  Algae and some bacteria
• Mushrooms are autotrophs.

  False
• The primary source of energy for the plants is the Sun.
• The primary source of energy for the plants is the Sun.

  True
• Cyanobacteria can perform photosynthesis.

  True
• Only plants can perform photosynthesis.

  False
• The only pigments found in plants are chlorophyll a and b.

  False
• All plants are autotrophs.

  False
• Autotrophs can perform photosynthesis.

  True
• Humans and animals need plants for food and carbon dioxide.

  False
• Oxygen exits and carbon dioxide enters through the stroma found on the underside of leaves.

  False
• A stack of grana is called a thylakoid.

  False
• The oxygen gas as a by-product of photosynthesis is produced from what reactions/process?

  Light reactions
• What are the reactants of photosynthesis?

  Carbon dioxide and water.
• Where do the light reactions occur?

  Thylakoid membrane.
• What pigment collects the most light energy?

  Chlorophyll