BISC 101 - Plant Midterm Exam
autotrophs ("self feeders") - Correct Answer>>>use light energy to drive the synthesis
of organic molecules from CO2 and water
Photosynthesis - Correct Answer>>>harnesses sunlight to make carbohydrate (sugar)
Chloroplasts - Correct Answer>>&...
autotrophs ("self feeders") - Correct Answer>>>use light energy to drive the synthesis
of organic molecules from CO2 and water
Photosynthesis - Correct Answer>>>harnesses sunlight to make carbohydrate (sugar)
Chloroplasts - Correct Answer>>>the site of photosynthesis in plants
endergonic reaction - Correct Answer>>>requires energy to react
Photosynthesis as a REDOX process - Correct Answer>>>- plants take in CO2 and H2O,
and with the aid of sunlight (energy) synthesis carbohydrate (glucose) and release O2
- carbon is reduced
- oxygen is oxidized
- endergonic
Cell wall - Correct Answer>>>- provides mechanical strength
- consists of rods or fibres of cellulose in a matrix of other polysaccharides and
proteins
Plasmodesmata - Correct Answer>>>connects cells through cell walls
central vacuole - Correct Answer>>>storage, waste breakdown
chloroplasts - Correct Answer>>>- site of photosynthesis
- have double membrane
- have fluid filled stroma
- has hundreds of membrane-bound thylakoids (= 3rd membrane system)
, Characteristic of young plant cell walls - Correct Answer>>>thing, flexible, primary cell
wall
thylakoids - Correct Answer>>>pancake-like grana (sing. granum),
enzymes and pigments held here - Correct Answer>>>thylakoid membrane or stroma
pigments - Correct Answer>>>substances that absorb visible light (a form of energy
Chlorophyll - Correct Answer>>>appears green b/c it absorbs violet-blue and red
wavelength light while reflecting green light
How does chlorophyll capture light energy? - Correct Answer>>>when a photon of light
strikes chlorophyll molecule energy is transferred to an electron, the electron is
raised to a higher energy state (if the electron falls back to its lower state it emits
energy as heat and light)
How can the energy in chloroplasts be passed to an electron acceptor? - Correct
Answer>>>chlorophyll molecules of an antenna complex to a reaction centre and then
the electron is transferred to an electron acceptor
What happens to "excited" electrons in photosynthetic pigments? - Correct
Answer>>>fluorescence, resonance, or reduction/oxidation
Photosystems on the thylakoid membrane contain: - Correct Answer>>>antenna
complex, reaction centre and electron acceptor
name the structures of the electron transport chain - Correct Answer>>>
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