Photosynthesis pt. 1

Question 1

Describes the process by which Photosynthetic organisms ___, synthesize organic compounds from inorganic raw materials using light

___is the means for solar energy to enter into the global ecosystem, and it alone is the essential biological process by which solar energy is transformed into metabolic form of energy for all forms of life on earth.

Answer 1

photoautotrophs
Photosynthesis

Question 1

– a yellow pigment
– a gray–brown pigment
– a yellow–brown pigment

Answer 1

Xanthophyll
Phaeophytin a
Phaeophytin b

Question 2

All electromagnetic radiation is light, but we can only see a small portion of this radiation

The reason that there are so many pigments is that each absorbs light more efficiently in a different part of the ____.

As objects grow hotter, they radiate energy dominated by ____

Answer 2

visible light

electromagnetic spectrum

shorter wavelength

Question 3

Magnesium absorbs a
wavelength of ___ and emits
a color of?

Answer 3

285.2nm

Question 4

Order in Light Absorption Spectra for Marine Algal Pigments (6)

Answer 4

Chlorophyll a

Chlorophyll c

Chlorophyll b

Carotenoids

Phycocyanin

Phycoerythrin

Question 5

Order in Light Absorption Spectra in normal plants

Answer 5

Chlorophyll a
Chlorophyll b
Carotenoids
Phycoerythrin
Phycocyanin
Chlorophyll b
Chlorophyll a

Question 6

wave is characterized by a ____

Light is also a particle, which we call a ____. Each contains an amount of energy that is called a ____

Answer 6

wavelength

photon

quantum (plural quanta

Question 7

Chlorophyll a absorbs the ____ wavelengths of light (___-___ with peak at ____)

Chlorophyll a also absorbs ____ (___-___ with a peak at _____)

Answer 7

violet blue - blue
390-450nm
420nm

orange to far-red
600-700nm
680nm

Question 8

Chlorophyll b however absorbs ____-____ light (____ with a peak at ____)

Chlorophyll b also absorbs ____(___ with a peak at ____).

Answer 8

violet blue to green blue
390-500nm
480nm

yellow to red light
600nm-680nm
630nm

Question 9

Plants still use the green and yellow spectra as there exist ____ that turn green or yellow photons (____-___ wavelengths) into blue and red photons through ____ and ____ reactions.

Answer 9

photopigments
500-600nm

excitation and emittance

Question 10

_____

____ flower when a period of darkness (uninterrupted) exceeeds a critical night length

____ flower when a period of darknees is less than a critical night length

Answer 10

Photoperiodism

Short-day plants

Long-day plants

Question 11

_____ radiation of wavelengths between 400 and 500 nm

Less efficient than green or red photons which have longer wavelengths

Occurs midday

____ is a phytochemical that absorbs it and initiates ___ (growing towards light) and sets plants ____ rhythm in combination with ___ and ____

Answer 11

Blue light

cryptochrome
phototropism
circadian rhythm

phytochrome and photoperiod

Question 12

____ Allows Energy to Move from the Site of Initial Absorbance to the Reaction Center

Excited chlorophyll can re-emit a photon and thereby return to its ground state—a process known as ____

Answer 12

Resonance Energy Transfer

fluorescence

Question 13

Resonance Energy Transfer guide (7)

Answer 13

Photon
Photosystem + Antenna Pigments
Resonance Transfer
Reaction center Chlorophyll
Electron Transfer
Electron Acceptor

Question 14

____ reactions of photosynthesis are the fastest chemical reactions.

Answer 14

Photochemical

Question 15

Proteins used to check Fluorescence Resonance Energy Transfer (2)

Answer 15

Cyan Fluorescence Protein (CFP)

Yellow Fluorescence Protein (YFP)

Question 16

____ large protein assemblies that enable ____ (blue-green algae) and ____ red algae to harvest the green and yellow light that penetrates to their ecological niche

Answer 16

phycobilisomes

Cyanobacteria
Rhodophyta

Question 17

Pigments are chemically ____ molecules, which have a metal ion at the center.

The metal ion in hemoglobin is ____ and in chlorophyll, it is ____.

Answer 17

porphyrin

iron
magnesium

Question 18

____ both additional chlorophylls as well as other classes of molecules, are closely associated with reaction centers. These pigments absorb light and funnel the energy to the reaction center for conversion into chemical forms.

Answer 18

Accessory pigments

Question 19

Equation

Beginning (2)

Middle (2)

End (2)

Answer 19

Co2 + H2O

Chlorophyll
Sun Light

O2 + Glucose

Question 20

increasing blue light from 11
to 28 % significantly ____

Answer 20

decreased