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Biology 1500 mizzou test 2 Exam Questions
And Answers |Latest 2025 | Guaranteed Pass
Energy and wavelengths - Answer✔as energy increases, wavelength decreases
(a tiny wavelength has big energy - think concentration)
Interpret that chlorophyll in a leaf has different behavior than the isolated chlorophyll. -
Answer✔in leaf - chlorophyll is intact and is paired with other reactions
in tube - chlorophyll gets excited but has no way to pass on energy so releases as light energy
colors we perceive are based on which ___ - Answer✔wavelengths strike our eyes
plants use what type of energy for photosynthesis - Answer✔visible energy (what we see as
colors)
light strikes an object, what can happen - Answer✔reflected - bounces off (the color you see)
transmitted - passes through (when you see glass, clear)
absorbed - energy is transferred to molecules of object
black vs white absorbing and reflecting - Answer✔black - absorbs all
white - reflects all
photosynthesis - Answer✔*process by which light energy is used to makes food molecules from
CO2 and H2O
*takes place in chloroplasts which have chlorophyll (a pigment)
pigment - Answer✔molecules that absorb light of a particular wavelength (color)
*chlorophyll absorbs violet, blue, and red light
1|Page
, ©THESTAR 2024/2025 ALL RIGHTS RESERVED 1:27PM. A+
fluorescence - Answer✔a substance absorbs light energy and re-emits it at a different
wavelength
-reflection - light energy bounces off, not absorbed
-bio-luminescence - chem reactions from living organisms generate light energy
how fluorescence works - Answer✔energy of a photon is absorbed by a molecule and excites an
electron into a higher energy states, electron drops soon to its ground state, releasing the
energy as light (often of a larger wavelength)
do plants naturally fluoresce - Answer✔no bc plants capture the energy by PROTEINS! for
photosynthesis
light reactions - Answer✔in the: thylakoid membrane and lumen
uses: h20,
MAKES: released oxygen, h+, electrons, atp, nadph
1. light splits water into 2 h protons, electrons, and an o, oxygen is realeased, the protons are
put in the proton gradient, and the electrons left to be excited in PS
2. light excites electrons in PS 2 and captures energy to use as work
3. work pumps protons (h+) against gradient and put in thylakoid lumen and moves electrons to
PS 1
4. light strikes PS 1 and reexcites electrons again -> NADP+ to NADPH
5. all protons in thylakoid want out and go down gradient to escape and make ADP + P -> ATP
*uses electron energy to make NADPH (where Hs used)
*atp (a-p-p-p ->last p-p most imp.) synthesized and used to transport energy around cells
*adp made after bond is broke by giving energy (a-p-p and p)
dark reactions - Answer✔in the: stroma
uses: nadph from light, atp from light, enzyme RuBisCO, CO2 from outside
MAKES: nadp for light, adp for light, G3P (glucose)
1. RuBP combines w CO2 to break apart and make 2 p-o-o-o
2. reduction, use ATP and NADPH, back to ADP and NADP+
3. regenerate RUBP
2|Page
Biology 1500 mizzou test 2 Exam Questions
And Answers |Latest 2025 | Guaranteed Pass
Energy and wavelengths - Answer✔as energy increases, wavelength decreases
(a tiny wavelength has big energy - think concentration)
Interpret that chlorophyll in a leaf has different behavior than the isolated chlorophyll. -
Answer✔in leaf - chlorophyll is intact and is paired with other reactions
in tube - chlorophyll gets excited but has no way to pass on energy so releases as light energy
colors we perceive are based on which ___ - Answer✔wavelengths strike our eyes
plants use what type of energy for photosynthesis - Answer✔visible energy (what we see as
colors)
light strikes an object, what can happen - Answer✔reflected - bounces off (the color you see)
transmitted - passes through (when you see glass, clear)
absorbed - energy is transferred to molecules of object
black vs white absorbing and reflecting - Answer✔black - absorbs all
white - reflects all
photosynthesis - Answer✔*process by which light energy is used to makes food molecules from
CO2 and H2O
*takes place in chloroplasts which have chlorophyll (a pigment)
pigment - Answer✔molecules that absorb light of a particular wavelength (color)
*chlorophyll absorbs violet, blue, and red light
1|Page
, ©THESTAR 2024/2025 ALL RIGHTS RESERVED 1:27PM. A+
fluorescence - Answer✔a substance absorbs light energy and re-emits it at a different
wavelength
-reflection - light energy bounces off, not absorbed
-bio-luminescence - chem reactions from living organisms generate light energy
how fluorescence works - Answer✔energy of a photon is absorbed by a molecule and excites an
electron into a higher energy states, electron drops soon to its ground state, releasing the
energy as light (often of a larger wavelength)
do plants naturally fluoresce - Answer✔no bc plants capture the energy by PROTEINS! for
photosynthesis
light reactions - Answer✔in the: thylakoid membrane and lumen
uses: h20,
MAKES: released oxygen, h+, electrons, atp, nadph
1. light splits water into 2 h protons, electrons, and an o, oxygen is realeased, the protons are
put in the proton gradient, and the electrons left to be excited in PS
2. light excites electrons in PS 2 and captures energy to use as work
3. work pumps protons (h+) against gradient and put in thylakoid lumen and moves electrons to
PS 1
4. light strikes PS 1 and reexcites electrons again -> NADP+ to NADPH
5. all protons in thylakoid want out and go down gradient to escape and make ADP + P -> ATP
*uses electron energy to make NADPH (where Hs used)
*atp (a-p-p-p ->last p-p most imp.) synthesized and used to transport energy around cells
*adp made after bond is broke by giving energy (a-p-p and p)
dark reactions - Answer✔in the: stroma
uses: nadph from light, atp from light, enzyme RuBisCO, CO2 from outside
MAKES: nadp for light, adp for light, G3P (glucose)
1. RuBP combines w CO2 to break apart and make 2 p-o-o-o
2. reduction, use ATP and NADPH, back to ADP and NADP+
3. regenerate RUBP
2|Page
