UILOON OT Modules.1-7.15 you will be able to 1. Describe the importance of photo

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UILOON OT Modules.1-7.15 you will be able to 1. Describe the importance of photoautotrophs to the rest of the biosphere. 2. Define and recognize examples (where appropriate) of the following terms: photoautotroph, carbon 2 fixation, electromagnetic spectrum, photon, pigment, and photophosphorylation. Apply the terms endergonic, exergonic, anabolic, and catabolic to the processes of photosynthesis and cellular respiration. Compare and contrast the reactants and products of photosynthesis with the reactants and products of cellular respiration. Write the summary equation (reaction) of photosynthesis, and identify. 3. 4. S. a. reactants b. products c. Which reactants become reduced d. Which reactants become oxidized 6. 7. 8. Relate the general components of a photosystem to their respective functions Briefly describe the characteristics of the electromagnetic spectrum and relate wavelength to the amount of energy available. Discuss the roles of photosynthetic pigments (including their absorption characteristics) and name the primary one Describe the structure of the chloroplast and identify or label a diagram with its components. Indlude stroma, grana, thylakoids, and thylakoid space, Identify regions in the chioroplast where ight reactions 9. and Calvin Cycle occur. 10. Distinguish between the functions of Photosystems I and It of the light reactions, and deseribe how they are related by tracing the path followed by electrons from water to NADP through the flectron transport chain, and identifying the location of ATP synthesis (ohotophosphorvlation). 11. Compare and contrast the similarities and differences between manufacturine ATR by photophosphorylation of photosynthesis and oxidative phosphorylation of celluian respiration 12. Identify the reactants, products, and the enayme responsible for carbon fixation in the C 13. Functionally relate the lignt reactiong and Calvin Cycle by stating which products of one are reactants irn mount of water, ight, and up, wor stay the other 14. Interpret how environmental changes in major Photosvnthesis reactants (ie e

Explanation / Answer

Q1 Importance of photoautotrophs

Photoautotrophs are those organisms which can synthesize organic compounds from carbondioxide and water drawing energy from sunlight by the process of photosynthesis. These are important to biosphere as they are the first step of almost every food chain and provide nutrition to all the heterotrophes (directly to herbivores and indirectly to carnivores)

Q2 Definition:

a) Photoautotrophs: Photoautotrophs are those organisms which can synthesize organic compounds from carbondioxide and water drawing energy from sunlight by the process of photosynthesis.

Examples: Green plants and Blue green algae

b) Carbon fixation: The process of converting carbon dioxide to organic compounds by various pathways.

Examples: Conversion of CO2 to glucose as in dark reactions of photosynthesis

c) Electromagnetic spectrum: It is the arrangement of electromagnetic radiations in increasing wavelength or frequency.

d) Photon: Photon is the smallest particle of any electromagnetic radiation, more specifically visible region.

e) Pigment: It is a substance which shows the a particular color on absorbing a specific wavelength from the electromagnetic spectrum and reflects the wavelength in visible region.

Example; Chlorophyll, Caroteniods,

f) Photophosphorylation: Generation of ATP from ADP and inorganic phosphate by utilizing the proton gradient generated by energy of sunlight is called Photophosphorylation.

Example: Light reactions of photosynthesis

Q3 Terms for Photosynthesis: Endergonic, Anabolic

Terms for Respiration: Exergonic, Catabolic

Q4 Photosynthesis:

Reactants : Carbon dioxide and water

Products : Glucose and Oxygen

Respiration:

Products : Carbon dioxide and water

Reactants : Glucose and Oxygen

Q5 summary reaction of photosynthesis:

6CO2 + 6H2O -------------------> Glucose + 6O2

Reactants : Carbon dioxide and water

Products : Glucose and Oxygen

Reactant Reduced : Carbon dioxide

Reactant oxidized : water

Q6 Characteristics of Electromagnetic spectrum:

Relation of wavelength to energy available:

The Energy content of these waves are inversely proportional to their wavelength. Smaller is the wavelength, higher is the energy.

Q7 Various Photosynthetic pigments are:

Main pigment is Chlorophyll a

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