Bio 103 Chapter 7 Vocab

Front 1

photosynthesis

Back 1

process by which chlorophyll containing organelles trap solar energy and convert it into carbohydrates

Front 2

autotrophs

Back 2

photosynthetic organisms that produce their own food

Front 3

heterotrophs

Back 3

nonphotosynthetic organisms that must consumer other living things to obtain energy

Front 4

stomata

Back 4

small opening on the underside of a leaf where CO2 enters

Front 5

chloroplasts

Back 5

membrane bound organelle in plant and algae that contain chlorophyll and perform photosynthesis

Front 6

stroma

Back 6

space and fluid within a chloroplast that contain thylakoid and enzymes necessary for photosynthesis

Front 7

thylakoid

Back 7

flattened sacs within the stroma whose membrane contains chlorophyll

Front 8

granum

Back 8

a stack of thylakoids

Front 9

chlorophyll

Back 9

green pigment in the thylakoid membrane that absorbs solar energy

Front 10

pigment

Back 10

a molecule that absorbs and reflects specific wavelengths of light

Front 11

absorption spectrum

Back 11

spectrum produced when atoms absorb certain wavelengths of light

Front 12

carotenoids

Back 12

yellow or orange pigments that assist chlorophyll

Front 13

action spectrum

Back 13

the spectrum of light that elicits a specific response

Front 14

light reactions

Back 14

portion of photosynthesis that captures solar energy, produces ATP and NADPH, and takes place in the thylakoid membrane

Front 15

electron transport chain

Back 15

a series of membrane bound carriers that pass electrons from one carrier to another releasing energy as they go

Front 16

Calvin cycle reactions

Back 16

portion of photosynthesis that takes place in the stroma and uses the products created during the light reaction to reduce CO2 to a carbohydrate

Front 17

photosystem (PS)

Back 17

a complex of pigments and electron acceptor molecules that absorbs solar energy and generates high-energy electrons

Front 18

noncyclic electron pathway

Back 18

portion of light reaction s involving both PSI and PSII

Front 19

photosystem I (PSI)

Back 19

light reaction engine that assist in the production of NADPH

Front 20

photosystem II (PSII)

Back 20

light reaction engine that assist in the production of ATP

Front 21

cyclic electron pathway

Back 21

portion of the light reaction that generates ATP using only PSI allowing spent electrons to return to the beginning of the reaction

Front 22

ATP synthase

Back 22

complex formed by enzymes and their carrier proteins that function in the production of ATP in mitochondria and chloroplasts

Front 23

chemiosmosis

Back 23

the production of ATP due to a hydrogen ion gradient

Front 24

CO2 fixation

Back 24

photosynthetic reaction in which CO@ is attached to an organic compound

Front 25

RuBP carboxylase

Back 25

an enzyme that speeds up the fixation of Co2 to RuBP

Front 26

G3P

Back 26

3 carbon organic molecule that is the product of the
Calvin cycle

Front 27

Noncyclic Electron Pathway of PSII

Back 27

1. Solar energy is captured
2. Energy concentrated
3. Energy sent to e- acceptor
4. e- moves moves to PSI as H+
5. H+ moves through synthase making ATP

Front 28

Noncyclic Electron Pathway of PSI

Back 28

1. Solar energy is captured
2. Energy concentrated
3. Energy sent to e- acceptor
4. e- is passed to NADP+ to form NADPH
5. NADPH moves to stroma for use in Calvin Cycle

Front 29

Calvin Cycle

Back 29

RuBP fixates local CO2 into C6 compound
C6 reduces to 3PG
ATP reduces 3PG to create BPG
NADPH reduces BPG to G3P
ATP then turns G3P back to RuBP