BISC 101 - PLANT MIDTERM EXAM WITH COMPLETE
100 QUESTIONS AND CORRECT SOLUTIONS
QUESTION: Photosynthesis as a REDOX process - 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
QUESTION: Cell wall - ANSWER-- provides mechanical strength
- consists of rods or fibres of cellulose in a matrix of other polysaccharides and proteins
QUESTION: Plasmodesmata - ANSWER-connects cells through cell walls
QUESTION: central vacuole - ANSWER-storage, waste breakdown
QUESTION: chloroplasts - ANSWER-- site of photosynthesis
- have double membrane
- have fluid filled stroma
- has hundreds of membrane-bound thylakoids (= 3rd membrane system)
QUESTION: Characteristic of young plant cell walls - ANSWER-thing, flexible, primary cell
wall
QUESTION: thylakoids - ANSWER-pancake-like grana (sing. granum),
, QUESTION: enzymes and pigments held here - ANSWER-thylakoid membrane or stroma
QUESTION: pigments - ANSWER-substances that absorb visible light (a form of energy
QUESTION: Chlorophyll - ANSWER-appears green b/c it absorbs violet-blue and red
wavelength light while reflecting green light
QUESTION: How does chlorophyll capture light energy? - 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)
QUESTION: How can the energy in chloroplasts be passed to an electron acceptor? - ANSWER-
chlorophyll molecules of an antenna complex to a reaction centre and then the electron is
transferred to an electron acceptor
QUESTION: What happens to "excited" electrons in photosynthetic pigments? - ANSWER-
fluorescence, resonance, or reduction/oxidation
autotrophs ("self feeders") - ANSWER-use light energy to drive the synthesis of organic
molecules from CO2 and water
QUESTION: Photosynthesis - ANSWER-harnesses sunlight to make carbohydrate (sugar)
QUESTION: Chloroplasts - ANSWER-the site of photosynthesis in plants
QUESTION: endergonic reaction - ANSWER-requires energy to react
100 QUESTIONS AND CORRECT SOLUTIONS
QUESTION: Photosynthesis as a REDOX process - 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
QUESTION: Cell wall - ANSWER-- provides mechanical strength
- consists of rods or fibres of cellulose in a matrix of other polysaccharides and proteins
QUESTION: Plasmodesmata - ANSWER-connects cells through cell walls
QUESTION: central vacuole - ANSWER-storage, waste breakdown
QUESTION: chloroplasts - ANSWER-- site of photosynthesis
- have double membrane
- have fluid filled stroma
- has hundreds of membrane-bound thylakoids (= 3rd membrane system)
QUESTION: Characteristic of young plant cell walls - ANSWER-thing, flexible, primary cell
wall
QUESTION: thylakoids - ANSWER-pancake-like grana (sing. granum),
, QUESTION: enzymes and pigments held here - ANSWER-thylakoid membrane or stroma
QUESTION: pigments - ANSWER-substances that absorb visible light (a form of energy
QUESTION: Chlorophyll - ANSWER-appears green b/c it absorbs violet-blue and red
wavelength light while reflecting green light
QUESTION: How does chlorophyll capture light energy? - 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)
QUESTION: How can the energy in chloroplasts be passed to an electron acceptor? - ANSWER-
chlorophyll molecules of an antenna complex to a reaction centre and then the electron is
transferred to an electron acceptor
QUESTION: What happens to "excited" electrons in photosynthetic pigments? - ANSWER-
fluorescence, resonance, or reduction/oxidation
autotrophs ("self feeders") - ANSWER-use light energy to drive the synthesis of organic
molecules from CO2 and water
QUESTION: Photosynthesis - ANSWER-harnesses sunlight to make carbohydrate (sugar)
QUESTION: Chloroplasts - ANSWER-the site of photosynthesis in plants
QUESTION: endergonic reaction - ANSWER-requires energy to react
