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Photosynthesis and Respiration
Very complicated and boring!!
28
Biology
10th Grade
02/15/2009

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Term
What are four things cells need energy for?
Definition
Digesting, Buulding, Moving, and Organizing Molecules
Term
What is the form o fenergy cells use?
Definition
Chemical
Term
Where is cells chemical energy found in?
Definition
ATP
Term
What is the ultimate source of enegy for plant?
Definition
Sun/sunlight
Term
Which has more usuable energy?
Atp or glucose?
Definition
ATP
Term
Which has energy that lasts for a long time?
Definition
Glucose
Term
Which has energy that losts for a short time?
Definition
ATP
Term
What is the product of glycosis?
Definition
2 molecules of pyruvic acid
Term
How many carbons are in 2 molecules of pyruvic acid?
Definition
It is a 3-carbon compound.
Term
What are pigments?
Definition
Light-absorbing molecules that a plant uses to gather the sun's energy.
Term
What is cholorphyll?
Definition
The plant's principal pigment?
Term
What are thylakoids?
Definition
Saclike photosynthetic membranes in choloroplasts
Term
What are photosystems?
Definition
Proteins in the thylakoid membrane that organize cholorphyll and other pigments
Term
What is stroma?
Definition
The fluid of the cholorplasts.
Term
What is NADP+?
Definition
A carrier molecule found in electron transport.
Term
What is the job of the NADP+?
Definition
NADP+ accepts and holds 2 high energy electrons along with a hydrogen ion. This converts the NADP+ into NADPH. The conversion of NADP+ into NADPH is one way in which some of the energy of sunlight can be trapped in chemical form.
The NADPH can then carry high energy electtrons produced by light absorption in cholorphyll to chemical reactions elsewhere in the cell. THese high-energy electrons are used to help build a variety of molecules the cell needs.
Term
What do light-dependent reactions?
Definition
produce oxygen gas /// convert ADP and NADP+ into the energy carriers ATP and NADPH.
Term
What is ATP synthase?
Definition
A protein that the cell membrane contains that spans the membrane and allows H+ ions to pass through it.
Term
What is the Calvin Cycle?
Definition
A cycle where: plants use the energy that ATP and NADPH contain to build high-energy compounds that can be stored for a long time.
Term
What is the first step of the Calvin Cycle?
Definition
Carbon Dioxide Enters the Cycle:
6 carbon dioxide molecules are combined with six 5-carbon molecules to produce twelve 3-carbon molecules.
Term
What is the second step of the Calvin Cycle?
Definition
Energy Input:
Energy from ATP and high-energy electrons from NADPH are used to convert the twelve 3-carbon molecules into higher-energy forms.
Term
What is the third step of the Calvin Cycle?
Definition
6-Carbon Sugar Produced:
Two 3-carbon molecules are removed from the cycle to produce sugars, lipids, amino acids, and other compounds.
Term
What is the fourth step of the Calvin Cycle?
Definition
5-Carbon Molecules Regenerated:
The 10 remaining 3-carbon molecules are converted back into six 5-carbon molecules, which are used in the next cycle.
Term
What is cellular respiration?
Definition
The process that releases energy by breaking down glucose and other food molecules in the presence of oxygen.
Term
What is glycolysis?
Definition
The process in which one molecule of glucose is broken in half, producing two molecules of pyruvic acid.
Term
What is NAD+?
Definition
An electron carrier that has 4-high energy electrons passed to it because of a reaction of glycosis.
Term
What is the Krebs cycle?
Definition
Pyruvic acid is broken down into carbon dioxide in a series of energy-extracting reactions
Term
What does the electron transport chain do during the Krebs cycle?
Definition
Uses high-energy electrons from the Krebs cycle to convert ADP into ATP.
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