BISC 101 – PLANT MIDTERM EXAM WITH
CORRECT DETAILED ANSWERS
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)
QUESTIONS; 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
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
CORRECT DETAILED ANSWERS
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)
QUESTIONS; 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
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
