Photosynthesis

Question 1

theory of ancient Greek about photosynthesis

Answer 1

plants are soil eaters

Question 2

contribution of Jan Baptiste van Helmont

Answer 2

experiment with willow plant, plant matter comes from water alone

Question 3

contribution of Joseph Priestley

Answer 3

vegetation restores injured air, plants produce o2 or dephlogisticated air

Question 4

contribution of jean senebier

Answer 4

photosynthesis depends on co2

Question 5

Who stated that there are two gases involved in photosynthesis

Answer 5

Lavoisier

Question 6

contribution of nicholas de saussure

Answer 6

water is an important requirement
co2 + h2o + light -> organic matter + o2

Question 7

scientist who discovered that red and blue light are effective in producing o2 during photosynthesis

Answer 7

engelman

Question 8

scientist that discovered chlorophyll which absorbs the light in photosynthesis

Answer 8

sachs

Question 9

contribution of van Niel and Robin Hill

Answer 9

o2 came from water in a process called photolysis aka Hill’s reaction

Question 10

final electron acceptor in photosynthesis

Answer 10

NADP+

Question 11

definition of photosynthesis

Answer 11

anabolic, endergonic, co2 requiring process that uses light energy and water to produce organic macromolecules

Question 12

complete equation of photosynthesis

Answer 12

6co2 + 12h2o + light energy -> c6h12o6 + 6o2 + 6h2o

Question 13

What is oxidized and reduced in photosynthesis

Answer 13

oxidized: water is oxidized to oxygen
reduced: carbon dioxide is reduced to glucose

Question 14

oxidation vs reduction (O, H, e-, energy)

Answer 14

oxidation: +O, -H, -e-, release energy, exergonic

reduction: -O, +H, +e-, stores energy, endergonic

Question 15

main photosynthetic pigment

Answer 15

chlorophyll a

Question 16

where are photosynthetic pigments located

Answer 16

inside thylakoid or cell membrane if cyanobacteria

Question 17

function of accessory chlorophyll pigments

Answer 17

absorb different wavelengths of light energy and pass the energy to chlorophyll a

Question 18

where is chlorophyll b found

Answer 18

all true plants

Question 19

where is chlorophyll c found

Answer 19

golden brown and brown algae

Question 20

where is chlorophyll d found

Answer 20

red algae

Question 21

red algae have which chlorophyll pigments

Answer 21

a and d

Question 22

light absorbing head of chlorophyll

Answer 22

porphyrin ring

Question 23

what elements is at the center of chlorophyll

Answer 23

Mg

Question 24

difference between chlorophyll a and b structure

Answer 24

a - CH3 end in porphyrin ring
b - CHO end in porphyrin ring

Question 25

chlorophyll is what type of molecule

Answer 25

lipid

Question 26

function of hydrocarbon tail in chlorophyll

Answer 26

interacts with hydrophobic regions of proteins inside thylakoid membrane

Question 27

organisms with chlorophylls a, b and carotenoids

Answer 27

mosses, ferns, seed plants, green algae, euglenoids, prochlorophytes

Question 28

organisms with chlorophylls a, c and carotenoids

Answer 28

diatoms, dinoflaagellates, brown algae

Question 29

organisms with chlorophyll a, d, carotenoids, phycobiliproteins

Answer 29

red algae, cyanobacteria

Question 30

function of phycobiliproteins

Answer 30

capture low light levels for deep water

Question 31

composition of photosystem

Answer 31

major reaction center (chlorophyll a), accessory pigments, primary electron acceptor

Question 32

p700

Answer 32

photosystem I

Question 33

p680

Answer 33

photosystem II

Question 34

function of carotenoids

Answer 34

protect chlorophyll from high energy that will degrade chlorophyll

Question 35

which absorbs more light, chlorophyll a or b

Answer 35

b

Question 36

graph plotting pigment's light absorption versus wavelength

Answer 36

absorption spectrum

Question 37

absorption spectrum of chlorophyll a suggests that __ and __ light work best for photosynthesis

Answer 37

violet-blue and red

Question 38

profiles the relative effectiveness of different wavelengths or radiation in driving a process

Answer 38

action spectrum

Question 39

atp production in presence of light

Answer 39

photophosphorylation

Question 40

strongest known biological oxidizing agent

Answer 40

P680+

Question 41

first byproduct of linear electron flow

Answer 41

oxygen

Question 42

what happens in cyclic electron flow

Answer 42

electrons cycle back from Fd to PS I reaction center

Question 43

products of cyclic electron flow

Answer 43

ATP

Question 44

is there oxygen released in cyclic electron flow

Answer 44

no

Question 45

what photosystem is used in cyclic electron flow

Answer 45

PS I

Question 46

where does calvin cycle occur

Answer 46

stroma

Question 47

chemiosmosis in mitochondria vs chloroplasts

Answer 47

mitochondria - protons are pumped to the intermembrane space and diffuse back into mitochnodrial matrix chloroplast - protons are pumped to the thylakoid space and diffuse back into stroma

Question 48

c3 vs c4 plant structure

Answer 48

c3 - no chloroplast in bundle sheath cells c4 - with chloroplast in bundle sheath cells so these are also photosynthetic

Question 49

where does calvin cycle take place in C4 plants

Answer 49

photosynthetic bundle sheath cells

Question 50

where does light rxn occur in c4 plants

Answer 50

mesophyll cells

Question 51

where does calvin cycle occur in c4 plants

Answer 51

bundle sheath cells

Question 52

c4 vs cam pathway

Answer 52

c4 - spatial separation cam - temporal separation

Question 53

when does light rxn occur in cam plants

Answer 53

day