Bio 111 Chapter 8 Quiz

Front 1

Light dependent reactions

Back 1

Make ATP and reduce NADP+ to NADPH

Front 2

Light independent reactions

Back 2

a.k.a carbon fixation

Use ATP and NADPH to synthesize organic molecules from CO2

Front 3

Photoelectric effect

Back 3

Removal of an electron from a molecule by light

Front 4

Absorption spectrum

Back 4

Range and efficiency of photons is capable of absorbing

Front 5

What happens as a photon strikes a molecule?

Back 5

It’s lost as heat or absorbed by the electrons of the molecule

Front 6

Chlorophyll a

Back 6

Main pigment

Acts directly to convert light energy to chemical energy

Front 7

Chlorophyll b

Back 7

Accessory pigment

Absorbs light wavelengths that chlorophyll a doesn’t absorb

Front 8

Porphyrin ring

Back 8

Ring structure with alternating double and single bonds

Magnesium in the center

Front 9

What happens in the porphyrin ring?

Back 9

Photons excite electrons in the rings

Electrons are shuttled away from the ring

Front 10

Action spectrum

Back 10

Relative effectiveness of different wavelengths of light in promoting photosynthesis

Front 11

Carotenoids

Back 11

Can absorb photons with wide range of energies

Antioxidant

Front 12

Phycobiloproteins

Back 12

Important in low light ocean areas

Front 13

Photosystem

Back 13

Reaction center complex surrounded by light harvesting complexes

Has 1* chlorophyll a molecules

Passes excited electrons out

Front 14

Light harvesting complexes

Back 14

a.k.a antenna complexes

Transfer energy of photons to the reaction center

Accessory pigments

Front 15

Photosystem II

Back 15

Functions first

Wavelength 680

Oxidize water

Front 16

Photosystem I

Back 16

Functions second

Wavelength 700

Functions like sulfur bacteria

Front 17

Cyclic Photophosphorylation

Back 17

Generated ATP by electron transport

Anoxygenic photosynthesis

Proton gradient

Front 18

Noncyclic photophosphorylation

Back 18

Linear electron flow

Photosystem replenished with electrons obtained by splitting water

Z diagram

Front 19

Calvin Cycle

Back 19

C3 photosynthesis

Attach CO2 to RuBP to form PGA

Rubisco

In chloroplast stroma

Front 20

Three stages of Calvin cycle

Back 20

Carbon fixation

Reduction

Regeneration of RuBP

Front 21

Carbon fixation process

Back 21

RuBP and CO2 -> PGA

Front 22

Reduction phase of Calvin cycle

Back 22

PGA reduced to G3P

Front 23

Regeneration of RuBP

Back 23

PGA used to regenerate RuBP

Front 24

G3P

Back 24

3 carbon sugar

Used to form sucrose and make starch

Front 25

Photorespiration

Back 25

Rubisco adds O2 instead of carbon dioxide in Calvin cycle

Front 26

Carboxylation

Back 26

Add CO2 to RuBP

Stomata open under normal conditions

Front 27

C4

Back 27

CO2 in four carbon compounds

Front 28

What are the two types of leaf cells in C4 plants?

Back 28

Bundle sheath cells

Mesophyll cells

Front 29

Bundle sheath cells

Back 29

Tightly packed sheaths around veins of leaf

Front 30

Mesophyll cells

Back 30

Loosely packed between the bundle sheath and leaf surface