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Chapter 8 Photosynthesis
Chapter 8 Biology
34
Biology
10th Grade
10/30/2008

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Term
What is energy?
Definition
The ability to do work
Term
What are autotrophs?
Definition
Organisms that make their own food.
Term
What are heterotrophs?
Definition
Organisms that obtain energy from the foods they consume.
Term
What must all organisms release their energy in?
Definition
Sugars and other compounds.
Term
What does ATP stand for?
Definition
Adonosine Triphosphate
Term
What does ATP consist of?
Definition
Adenine, a 5-carbon sugar called ribose, and three phosphate groups.
Term
How is ADP different from ATP?
Definition
ADP has two phosphate groups.
Term
How is energy added to ADP and what does it change into?
Definition
A phosphate group is added and it changes into ATP.
Term
What are some functions that ATP can preform?
Definition
Active Transport, Protein Synthesis, and Muscle Contraction
Term
How is energy released from ATP?
Definition
The third phosphate group breaks off.
Term
How much ATP are in cells? And why?
Definition
Very little, Because ATP is not good for storing large amounts of energy, and only a few seconds of energy comes out of ATP
Term
What did Van Helmont discover?
Definition
That plants use water to make them grow.
Term
What did Priestly discover?
Definition
He discovered that plants produce oxygen
Term
What did Jan Ingenhousz discover?
Definition
That plants need sunlight in order to grow.
Term
What is the photosynthesis equation?
Definition
Carbon Dioxide + Water ->(light)-> Sugars + oxygen
Term
What does photosynthesis produce?
Definition
Sugars, Starches and Oxygen
Term
What gather the sun's energy?
Definition
Pigments
Term
What are the two types of chlorophyll?
Definition
Chlorophyll a and Chlorophyll b
Term
When was photosynthesis discovered?
Definition
In the 1800s
Term
What are saclike photosynthetic membranes? And where are they found?
Definition
Thylakoids for in Choloroplasts
Term
What are stacks of thylakoids called?
Definition
Grana
Term
What are two reactions which take place during photosynthesis?
Definition
Light-dependent Reactions and Light-Independent Reactions
Term
What is the other name for light-dependent reactions?
Definition
Calvin Cycle
Term
Where do each reaction take place?
Definition
Light-dependent reactions in the thylakoid membrane--------Calvin Cycle in the stroma.
Term
What is the carrier molecule in photsynthesis?
Definition
NADP+
Term
How does NADP+ become NADPH?
Definition
When NADP+ holds high-energy electrons and a hydrogen ion
Term
What can happen when NADP+ is changed into NADPH?
Definition
It can use some energy
Term
What do Light-Dependent Reactions (LDRs) produce?
Definition
ATP and NADPH
Term
How does photosynthesis begin?
Definition
When the pigments in photosystem 2 absorb light.
Term
Describe the process of LDRs
Definition
Pigemts abosorb sunlight in Photosystem 2, then High Energy Electrons are passed through the electron transport chain, then the electrons are recharged in photosystem 1 and form NADPH, then hydrogen ions move to the thylakoid membrane, finally, the hydrogen ions pass through ATP synthase and the energy is used to convert ADP to ATP.
Term
What is ATP Synthase?
Definition
A protein on the membrane of the thylakoid, and H+ ions pass through it
Term
Who was the Calvin Cycle named after?
Definition
Melvin Calvin
Term
Describe the Calvin Cycle
Definition
First, six CO2 molecules enter and combine with six 5-carbon molecules and produce twelve 3-carbon molecules, then ATP and NADPH give the molecules more energy, then two 3-carbon molecules are removed to produce other compunds, the the remaining ten 3-carbon molcules are converted into six 5-carbon molecules to be used in the reaction again.
Term
What factors affect photosynthesis? and at what levels?
Definition
Water (more water speeds up photosynthesis), Temperature (between 0-35 degrees Celsius), Intensity of light (eventually peaks)
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