Lecture 8 - Photosynthesis

Question 1

process by which plants, algae, and some microorganisms harness solar energy and convert it to chemical energy

Answer 1

Photosynthesis

Question 2

True/False: with few exceptions, all life on earth ultimately depends on photosynthesis

Answer 2

True

Question 3

Photosynthesis Equation

Answer 3

6CO2 + 6H2O + light –> C6H12O6(Glucose) + 6O2

Question 4

range of all possible frequencies of radiation

Answer 4

electromagnetic spetrum

Question 5

organelle of photosynthesis

Answer 5

chloroplast

Question 6

Chloroplast physiology:

2 outside membranes enclosed

Answer 6

stroma

grana

Question 7

gelitonous with enzymes, ribosomes, DNA, and grana

Answer 7

stroma

Question 8

stack of thylakoids

Answer 8

grana

Question 9

where do light eractionsoccur

Answer 9

in thylakoid membrane

Question 10

what do light reactions do

Answer 10

convert solar energy to chemical energy

Question 11

Light Reactions:

energy from captured photons used to make ____ and ____

Answer 11

ATP

NADPH

Question 12

ATP or NADPH:

stores energy

Answer 12

ATP

Question 13

ATP or NADPH:

carries electron

Answer 13

NADPH

Question 14

2 types of Light Reactions, which comes first

Answer 14

Photosystem ll (First)
Photosystem I (Second)

Question 15

Which Photosystem deals makes NADPH

Answer 15

PSI

Question 16

Which photosystem makes ATP

Answer 16

PSII

Question 17

All plants use ____ to make glucose

Answer 17

C3 Pathway (Calvin Cycle)

Question 18

Describe Carbon Reactions:

Answer 18

• Calvin Cycle assembles CO2 into glucse
  1. Carbon Fixation
  2. PGAL Synthesis
  3. RUBP regenerated

Question 19

Where does energy used to create PGAL come from?

Answer 19

Light Reactions (PSII and PSI)

Question 20

ATP and NADPH from light reactions provide ______ _____ and _______

Answer 20

potential energy

electrons

Question 21

ATP and NADPH used to reduce _____ to glucse

Answer 21

CO2

Question 22

where do carbon reactions occur

Answer 22

in stroma

Question 23

True/False: Carbon Reactions require light

Answer 23

FALSE

Question 24

light = __________ ____________

Answer 24

independent reaction

Question 25

Which part of photosynthesis s used to split water

Answer 25

PSII

Question 26

Photorespiration is a problem....

Answer 26

in hot, dry, conditions

Question 27

What is the name of the enzyme that combines RUBP sugar and CO2 and splits it in half

Answer 27

Rubisco

Question 28

Photorespiration: Rubisco uses _____ as a substrate (instead of ____) starting a process that removes already fixed Carbon

Answer 28

O2CO2

Question 29

If stomata kept closed it prevents _____ loss, ____ builds up and photorespiration _____

Answer 29

water, O2, increases

Question 30

what happens if you don't water your plants?

Answer 30

everything shuts down - don't make ATP - don't make NADPH - don't make sugar/glucose

Question 31

True/False: C4 plants use additional pathway

Answer 31

True

Question 32

What does the additional pathway that C4 plants use do?

Answer 32

conserve H2O and CO2

Question 33

absorbs photons of energy

Answer 33

Antana Pigments

Question 34

2 antana pigments

Answer 34

Chlorophyll | Keratinoids

Question 35

Chlorophyll: absorbs: reflects:

Answer 35

red and blue | green

Question 36

Keratinoids: absorbs: reflects:

Answer 36

blue and green | orange and red

Question 37

most abundant antana pigment

Answer 37

chlorophyll

Question 38

photosynthesis pigment in plants, algae, and cyanobacteria

Answer 38

chlorophyll

Question 39

only ______ light is photosynthetically active

Answer 39

absorbed

Question 40

unit with chlorophyll A and other pigment molecules and proteins anchored in the thylakoid membrane

Answer 40

photosystem

Question 41

excites electrons...chlorophyll A molecule that uses the light energy

Answer 41

Reaction Center

Question 42

other pigments that capture energy and funnel it to reaction center

Answer 42

antenna pigments

Question 43

phosphorylation adds P to ADP

Answer 43

Chemiostmotic Phosphorylation

Question 44

movement of proton across membrane

Answer 44

chemiosmosis

Question 45

Photosynthesis Equation: What molecule substrate makes up organs mass of the plant

Answer 45

CO2 (air)

Question 46

what is H2O main purpose in photosynthesis equation

Answer 46

provide proton and electron