Flashcards in Class 5 Deck (122)
Loading flashcards...
1
photosynthesis powers the cellular processes in the plant and downstream, the main -- of organisms and ecological processes
energy source
2
ligher reactions are also called the -- reactions
thylakoid
3
carbon (fixation) reactions are also called the -- reactions
dark
4
the bulk of photosynthesis takes place in the leaf -- which has cells with many chloroplasts
mesophyll
5
chloroplasts have high concentration of light-absorbing -- pigments called chlorophylls
green
6
light reactions occur in the --
internal membranes (thylakoid)
7
carbon reactions occur in the -- of the chloroplast, the aqueous region surrounding the thylakoids
stroma
8
light reactions lead to the splitting of --
water
9
light reactions produce -- and -- (reducing equivalents and energy) to be provided to the carbon reactions
ATP and NADPH
10
light is an -- wave and many kinds of light exist = many wavelengths (or frequencies)
electromagnetic
11
light is also a particle so it contains --
energy (i.e. impact)
12
sunlight is a stream of -- of different frequencies
photons
13
plants can only use a narrow range of wavelengths for photosynthesis, the same range as the human eye,
visible spectrum, 400-700 nm
14
an -- of a substance quantifies its ability to take up light across the spectrum
absorption spectrum
15
absorption spectrum plots a substance's absorption of light against -- of light
wavelength
16
absorption of light energy by pigment molecules takes place when the photon causes an electron to move to a higher energy state; the molecule becomes --
excited
17
as a chlorophyll molecule returns to its less excited state, it releases the energy by emitting --, energy transfer, or photochemistry
heat, fluorescence,
18
fluorescence involves -- a photon of lower energy (longer wavelength)
re-emitting
19
energy transfer causes the -- of another pigment
excitation
20
photochemistry causes -- to occur
chemical reactions
21
photosynthetic pigments include chlorophylls (and -- in certain bacteria), and carotenoids and other accessory pigments
bacteriochlorophylls
22
photosynthetic pigments are rich in -- which stabilize the excited state
conjugated double bonds
23
chlorophyll a and chlorophyll b are made up of a complex ring structure called -- (similar to in hemoglobin)
haem group
24
a harm group contains a -- atom bonded to nitrogen
Mg
25
a harm group contains a long -- that holds the pigment anchored to a protein or membrane
hydrocarbon tail
26
carotenoids are linear molecules which give a -- color
orange
27
carotenoids are intimately associated with the -- and with photosynthetic proteins
thylakoid membrane
28
light absorbed by the carotenoids is transferred to chlorophyll for photosynthesis and thus carotenoids are --
accessory pigments
29
carotenoids also help protect from --
excess light damage
30
