Chapter 8 Flashcards
What are the reactants for the photosynthesis reactions?
Water and Carbon dioxide
What are the products for the photosynthesis reactions?
Sugars and Oxygen
How does a plant obtain the reactants needed for photosynthesis?
It obtains CO2 through leaves or the atmosphere
It obtains H20 through plant roots
What role is played by the hydrogen ions that were released from the water molecules?
The difference in both charge and H+ ion concentration across the membrane provides the energy to make ATP (so it makes ATP)
What is the main photosynthetic pigment of photosynthesis?
Chlorophyll
Explain why chlorophyll appears green in color
Chlorophyll is able to absorb all of the spectrum except green. Leaves reflects green light
What is the role of chlorophyll in photosynthesis?
Chlorophyll absorbs visible light, a large part of that light energy is transferred directly to electrons in the chlorophyll molecule itself.
Why is sunlight needed in photosynthesis?
Sunlight converts water and carbon dioxide into high energy sugars and oxygen
Name the part of the leaf that is the primary region of photosynthesis?
Chloroplasts
Explain what happens when sunlight hits chlorophyll molecules
They produce a steady supply of high energy electrons, which is what makes photosynthesis work
What is the name of the electron carrier in photosynthesis?
NADP+
What is the purpose of the light dependent reaction?
It uses energy from sunlight to produce oxygen and convert ADP and NADP+ into the energy carriers ATP and NADPH
Water molecules are broken down in the light dependent reactions. Name the three substances that are formed when water molecules are broken down
Oxygen, electrons and hydrogen ions
What happens to the oxygen released from the water molecules?
Oxygen is released into the atmosphere
Describe what happens to the high-energy electrons that are produced by photosystem 1.
The stroma picks them up and they join H+ and form NADPH
