Bioenergetics 1 (Photosynthesis)- Biology Unit 3

Bioenergetics

The energy of life / energy transfer through an ecosystem

What is Photosynthesis

Storing the energy from sunlight in the bonds of glucose (food)

Where does photosynthesis occur

Chloroplast

Photosynthesis equation

6CO^2 + 6H^2O --> C^6H^12O^6 + 6O^2

What are the two parts of PSN

Light reactions & Calvin Cycle

What is ATP

Adenosine Triphosphate - The only source of energy living things use

Where does the energy in ATP come from

The high energy phosphate to phosphate bonds

What is NADP/ NADPH

High energy hydrogen carrier (taxi cab)

What happens when NADP/NADPH gains/loses a hydrogen

gains- neutral / loses- positive

The only colors plants can use

reds & blues

Chlorophyll a absorbs which colors

Reds

Chlorophyll b absorbs which colors

Blues

What goes into light reactions from the environment

hv & H2O

What goes into light reactions from the Calvin Cycle

ADP, Pi and NADP+

What comes out of light reactions

ATP, NADPH, & O2

What happens in Cyclic rxn

Uses red light and chlorophyll a to produce ATP

What goes into Cyclic rxn

ADP & Pi, light energy

What comes out of Cyclic rxn

ATP

What happens to the e- in Cyclic rxn

bounces across different substances. Gives off enough Energy to bond Pi + ADP --> ATP

What happens in non cyclic light reaction

Uses blue light and chlorophyll b to produce ATP, NADPH, and O2

What goes into non cyclic rxn

Light energy, H20, ADP & Pi, NADP

What happens at the beginning of non cyclic light rxn

Mn (manganese) and Cl (chlorine) split H20 into H++ and O (which becomes oxygen/O2)

What happens to the H++ in non cyclic light rxn

one H+ gets split into H and e- (the e- goes to fuel the ATP production) and the other H+ bonds to NADP forming NADPH

What does fp do

Bonds the e- from the chlorophyll b and electron acceptor to the last H which then bonds the H to NADP, creating NADPH

Between the two light rxn how much ATP and NADPH is formed

2 ATP (one from cyclic and another from non cyclic), 1 NADPH