Bio Ps Test

Front 1

Photosynthesis

Back 1

Process that converts light energy into chemical energy in the form of organic compounds

Front 2

Biochemical pathways

Back 2

The reactions in PS

Front 3

Definition of autotrophs

Back 3

They use energy from the sun or from chemical bonds in org. substances to make org. compounds

Front 4

Heterotrophs

Back 4

get energy from food instead of direct sunlight/PS

Front 5

Products of one reaction...

Back 5

are the reactants of another

Front 6

Overview of Light Reactions

Back 6

light energy converted to chem. energy which id temporarily stored in ATP and the energy storing molecule NADPH

Front 7

Overview of Calvin Cycle

Back 7

organic compounds are formed using CO2 and the energy stored in ATP and NADPH

Front 8

Equation of PS

Back 8

CO2+H20 yields C6H12O6+O2

or

CO2+H2O yields CH2O+O2

Front 9

The light reactions begin by

Back 9

the absorption of light in chloroplasts

Front 10

Thykaloids and stroma

Back 10

1.)The inner membrane of chloroplasts arranged in layered stacks called grana

2.)solution surrounding grana

Front 11

chlorophyll a

Back 11

directly involved in light reactions, absorbs more red than b, reflects green

Front 12

chlorophyll b

Back 12

accessory pigment, reflects green

Front 13

carotenoids

Back 13

yellow, orange, and brown accessory pigments

Front 14

photosystem

Back 14

groups of pigments embedded in the thykaloid membrane by proteins

Front 15

LR: Step 1

Back 15

Light hits the thylakoid membrane of PSII, making electrons more energetic. They leave the chlorophyll a molecules (which have now undergone an oxidation reaction).

Front 16

LR: Step 2

Back 16

Electrons move to the primary electron acceptor

Front 17

LR: Step 3

Back 17

The acceptor moves them into the the ETC and they lose the initial energy they had. It was used to pump H+ into the thylakoid.

Front 18

LR: Step 4

Back 18

Light hits the thylakoid membrane of PSI (same time as it hits PSII). Electrons gain energy and move to the second PEA which moves them to the ETC.

Front 19

LR: Step 5

Back 19

The ETC brings the electrons to the side of the thylakoid membrane that faces the stroma. The electrons combine with a proton(H+) and NADP+. This is reduced to NADPH.

Front 20

How are electrons in PSII replaced?

Back 20

By the splitting of H2O molecules.

Front 21

Synthesis of ATP in the light reactions

Back 21

Movement of protons across the ATP Synthase into the stroma releases energy, which is used to made ATP.