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Ch. 9.1 and 9.2 Photosynthesis and ATP
Vocab terms for 9.1 and 9.2
12
Biology
9th Grade
01/29/2015

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Term
photosynthesis
Definition
The process that plants use to trap the sun's energy and build carbohydrates (glucose) that stores energy (food).
Term
light-dependent reactions
Definition

During this reaction, light energy is converted to chemical energy (ATP); it mainly happens during daylight.

 

It also happens in the membranes of the thylakoid discs in chloroplasts.

Term
light-independent reactions
Definition

This reaction does not need light to occur; during this reaction, glucose is made.

 

It happens in the stroma of the chloroplast.

Term
pigments
Definition

These are molecules that absorb specific wavelengths of sunlight; they are found in the thylakoid membrane; chlorophyll is the most common one.

 

 

Term
chlorophyll
Definition
The most common pigment in chloroplasts; it is green in color.
Term
electron transport chain
Definition

This is a series of proteins embedded in the thylakoid membrane; excited electrons are passed down this, from protein to protein, releasing a little bit of energy a each step.

 

Term
NADP+
Definition

Electron carrier molecule.

 

Combines with a hydrogen ion to become NADPH.

Term
photolysis
Definition

The process of splitting a water molecule; from this process, we get the oxygen we breathe.

 

Term
Calvin cycle
Definition
This is the second phase of photosynthesis; it happens during the light-independent reactions in the stroma of the chloroplast.
Term

C6H12O6

Definition
This is the chemical formula for glucose.
Term
ATP
Definition
This super important molecule is used by organisms for energy; it is your "energy currency".
Term
ADP
Definition
The molecule formed from breaking off a phosphate group from ATP; results in a large release of energy used for biological reactions.
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