BIOLOGY 1500 MIZZOU TEST 2 QUESTIONS AND ANSWERS 100% PASS

BIOLOGY 1500 MIZZOU TEST 2 QUESTIONS AND ANSWERS 100% PASS energy and wavelengths - 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. - 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 ___ - wavelengths strike our eyes plants use what type of energy for photosynthesis - visible energy (what we see as colors) light strikes an object, what can happen - 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 - black - absorbs all 2100% Pass Guarantee Sophia Bennett, All Rights Reserved © 2025 white - reflects all photosynthesis - *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 - molecules that absorb light of a particular wavelength (color) *chlorophyll absorbs violet, blue, and red light fluorescence - 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 - 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 - no bc plants capture the energy by PROTEINS! for photosynthesis light reactions - in the: thylakoid membrane and lumen uses: h20, 3100% Pass Guarantee Sophia Bennett, All Rights Reserved © 2025 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