BIO Study Guide, Test 2

BIO Study Guide, Test 2 - Study guide map 1 Photosynthesis...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Study guide map 1. Photosynthesis 2. Electron Transport (in plant cells) 3. Calvin Cycle 4. Photorespiration 5. C 3 and C 4 plants 6. Glucose Metabolism 7. Redox Reaction 8. Glycolysis 9. Cellular Respiration 10. Fermentation 11. Electron Transport Chain/Chemiosmosis 12. Simultaneous reactions 8.1 Photosynthesis (synthesis from light): is the metabolic process by which the energy of light is captured and used to convert carbon dioxide (CO 2 ) and water (H 2 O) into carbohydrate sugars (C 6 H 12 O 6 ) and oxygen gas (O 2 ) Things necessary for photosynthesis o Water comes from soil and is collected by roots and is the producer of O2 released by plant o Plants take in CO 2 and release water and O 2 through stomatas (tiny opening on leaves) o Light is NECESSARY for both light reactions and Light-independent reactions Equation for photosynthesis: o 6CO 2 +12H 2 O C 6 H 12 O 6 +6O 2 +6H 2 O Light Reactions o Driven by light energy, converts light energy into chemical energy in the form of ATP and NADPH + H+ Light-independent reactions o Use ATP, NADPH+H+ , and CO 2 to produce sugars Calvin Cycle C 4 photosynthesis Crassulacean acid metabolism o But need light to get ATP and NADPH + H+ Samuel Ruben and Martin Kamen did an expermeint which proved that water is the source of oxygen produced by photosynthesis o Because the plants that they gave isotope labeled water released isotope labeled O 2 ; Plants not given water did not produce O 2 Photosynthesis occurs in Chloroplast 8.2
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Light, is a form of electromagnetic radiation and comes in the form of photons o Can behave as both a particle and a wave Amount of energy in a photon is inversely proportional to its wavelength Shorter wavelengths have greater energy Photons o Can be scattered, transmitted or absorbed…but to be biologically available it must be absorbed by the receptive molecule and contain enough energy to carry out chemical work o When a molecule absorbs a photon, the molecule goes from a grounded state to an excited state In excited molecules electrons are boosted to shells farther from its nucleus, making the electron “more free” and the molecule more chemically reactive Pigments are molecules that absorb wavelengths in the visible spectrum Leaves a[[ear green because chlorophyll absorbs blue and red light, giving the leaves a green appearance o Absorption spectrums -plotted wavelengths of light absorbed by pigments o Action spectrum -plotted biological activity of an organism as a function of wavelengths absorbed o Chlorophyll a and chlorophyll b are primary pigments which absorb light, however accessory pigments are necessary to absorb photons with intermediate energy between red and blue wavelengths Carotenoids and phycobilins are both necessary accessory pigments Two things can happen with absorbed light, energy can be released as florescence or it can be passed to another pigment through the antenna systems
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/28/2008 for the course BIO 111 taught by Professor Dunn during the Spring '08 term at Morehouse.

Page1 / 11

BIO Study Guide, Test 2 - Study guide map 1 Photosynthesis...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online