photosynthesis vs cellular respiration

photosynthesis cellular respiration


  • 1) biology The process by which plants and other photoautotrophs generate carbohydrates and oxygen from carbon dioxide, water, and light energy in chloroplasts.
  • 2) The process in green plants and certain other organisms by which carbohydrates are synthesized from carbon dioxide and a source of hydrogen (usually water), using light as an energy source. Most forms of photosynthesis release oxygen as a byproduct.
  • 3) (Plant Physiol.) The process of constructive metabolism by which carbohydrates are formed from water vapor and the carbon dioxide of the air in the chlorophyll-containing tissues of plants exposed to the action of light. It was formerly called assimilation, but this is now commonly used as in animal physiology. The details of the process are not yet clearly known. Baeyer's theory is that the carbon dioxide is reduced to carbon monoxide, which, uniting with the hydrogen of the water in the cell, produces formaldehyde, the latter forming various sugars through polymerization. Vines suggests that the carbohydrates are secretion products of the chloroplasts, derived from decomposition of previously formed proteids. The food substances are usually quickly translocated, those that accumulate being changed to starch, which appears in the cells almost simultaneously with the sugars. The chloroplasts perform photosynthesis only in light and within a certain range of temperature, varying according to climate. This is the only way in which a plant is able to organize carbohydrates. All plants without a chlorophyll apparatus, as the fungi, must be parasitic or saprophytic.
  • 4) synthesis of compounds with the aid of radiant energy (especially in plants)
  • 5) A chemical combination brought about by the action of light, as in the formation of carbohydrates in living plants from the carbon di-oxid and water of the air under the influence of sunlight.


  • 1) Leaves use up nutrients in the process of photosynthesis.
  • 2) The process is called photosynthesis.
  • 3) In England they're working on a sort of artificial photosynthesis.
  • 4) In the world of photosynthesis, the energy in the sunlight is not used to heat things up, but to drive a series of chemical reactions.
  • 5) Several Nobel Prizes for Chemistry have been awarded for work in photosynthesis and respiration, the two main processes in the energy metabolism of living organisms (cf. Section 3.5).
  • 6) Prof. Andersson has published a total of 275 papers in photosynthesis research, biological membranes, protein and membrane purification, and light stress
  • 7) Examples of such scientists include Stapp, Patel and those at Berkeley lab who, this year, demonstrated photosynthesis is a quantum mechanical mechanism.
  • 8) However, I do believe recent discoveries of the inherent use of quantum conductivity in photosynthesis and quantum computation in DNA lends support to the idea that we may be getting closer to better defining the gray area between the emperical and the metaphysical.
  • 9) But photosynthesis is much more efficient than our solar technologies, for reasons that scientists are still working out.
  • 10) Berkerly lab finding of the role of quantum mechanics in photosynthesis has certainly removed any doubt of the reality of life directly using quantum mechanics.
  • 11) Whether at sea or on land, the chemical process that traps photons and uses them to drive ‘uphill’ energy-consuming chemical reactions, manufacturing convenient energy-storage molecules such as sugars and starch, is called photosynthesis.
  • 12) The mystery of how Nature, through photosynthesis, is able to transfer solar energy through molecular systems with nearly 100-percent efficiency appears to have been solved.
  • 13) ‘Stomata are involved in two of the most important plant processes, photosynthesis and transpiration.’
  • 14) ‘To avoid the production of oxygen via photosynthesis, plants were kept in the dark.’
  • 15) ‘It is created, as we have seen, during photosynthesis, when organisms strip oxygen from water molecules.’
  • 16) ‘Evidence is increasing of a new player in carbon metabolite regulation of photosynthesis.’
  • 17) ‘Anthocyanins are water soluble pigments but are not involved in photosynthesis.’
  • 18) ‘When maize encounters water deficits, there is a decline in photosynthesis per plant.’
  • 19) ‘Normally the proportion of the two isotopes of carbon is simply controlled by the rate of photosynthesis in plant tissues.’
  • 20) ‘As injury progresses, heavily damaged leaves lose their green colour and photosynthesis is much reduced.’
  • 21) ‘These populations do not have the ability to utilize exogenous bicarbonate for the process of photosynthesis.’
  • 22) ‘In addition, rates of light-limited photosynthesis and oxygen yield are decreased in the mutants.’
  • 23) ‘Carbohydrate depletion and reduced photosynthesis are the main effects of submergence on plant tissues.’
  • 24) ‘Light is necessary for photosynthesis in plants, but the supply of light in natural environments is not constant.’
  • 25) ‘Their job is to absorb the rays from the sun to begin the process known as photosynthesis.’
  • 26) ‘These results are consistent with the previous report that water stress inhibits photosynthesis.’
  • 27) ‘Drought reduces productivity by inhibiting plant growth and photosynthesis.’
  • 28) ‘It has long been known that magnesium availability to plants imposes limits on photosynthesis.’
  • 29) ‘Many forms are capable of photosynthesis and hence resemble plants in the way that they obtain energy.’
  • 30) ‘This is an integrative trait, reflecting both light and dark reactions of photosynthesis.’
  • 31) ‘Possible use of serine derived directly from photosynthesis was ignored in this analysis.’
  • 32) ‘Carbohydrates accumulate in plants during the autumn as rates of photosynthesis begin to exceed growth.’

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