Photosynthesis and Respiration

Essay by Serenity__1College, UndergraduateA, March 2009

download word file, 2 pages 5.0

Part I.

PhotosynthesisAerobic Cellular RespirationBalanced Equation: FullReactantsCarbon Dioxide, Water, EnergyOxygen & GlucoseProductsOxygen and GlucoseWater, Carbon Dioxide and EnergyReaction: Endergonic or Exergonic?EndergonicExergonicEnergy source usedLightEnergy (ATP)Reaction: Cell organelles involvedChloroplasts; found mostly in the mesophyll (palisade layer)MitochondriaRole of ATPCreated in the light reaction so that it can be used in the dark reaction. It is used immediately in the dark reaction.The covalent bonds between atoms store energy then are sent out to the other cells in the organism to provide them with an energy source.

Part II.

Q. 1 Autotrophs; the names given to the organisms that can produce glucose by way of photosynthesis. Phototrophs and chemoautotrophs are the subdivision of autotrophs. Autotrophs can synthesize molecules they require for life using inorganic compounds and an external energy source ( Three different types of autotrophs are 1) plants 2) algae and 3) archaea, which can be classified as Crenarchaeota, Euryarchaeota and Korarchaeota.

Q. 2 Aerobic organism; the name given to organisms that break down glucose, also known as obligate aerobes. Aerobes are advantageous from the energetical point of view, but also pose obligatory exposure to high levels of oxidative stress. Aerobic organisms are ones that require oxygen for growth and for cellular respiration. Three examples of these organisms would be 1) bacteria such as Pseudomonas aeruginosa or Mycobacterium tuberculosis 2) yeasts and 3) humans.

Q. 3 Fermentation is a breakdown process of glucose in the absence of oxygen, meaning the oxygen runs out or oxygen can't be used at all. Pyruvate is formed by glycolysis and then it is converted to Lactic Acid. During the fermentation process only two ATP molecules are created giving the cell enough energy until it produces oxygen again and can convert back into the right energy producing pathway. Ethanol is a cell that can be created...