• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Under which wavelength of light in the visible spectrum will the rate of photosynthesis in plants be the greatest and how will the growth of plants be affected?

Extracts from this document...


Extended Essay Research Question- Under which wavelength of light in the visible spectrum will the rate of photosynthesis in plants be the greatest and how will the growth of plants be affected? Introduction- This essay is based on the investigation of the effect of different wavelengths of light on the growth of plants. The aim of this experiment is to find out which wavelength of light will influence the growth of a plant the most. Background Information- Photosynthesis is an essential process for the survival of all life on earth. This process has two major implications; it is the means, by which the sun's energy is captured by plants for use by all organisms, it is also the process that releases oxygen into the atmosphere for use by all aerobic organisms. ...read more.


groups of hundreds of molecules of chlorophyll to a special chlorophyll molecule at the center of the photosystem. There are two kinds of photosystems, photosystem I (PS I) and photosystem II (PS II). This molecule is responsible for passing these 'excited' electrons to a chain of electron carriers. The process that follows this is the production of ATP. 'Excited' electrons are passed through a series of electron carriers; these electrons lose some energy every time they pass from one carrier to the next. Eventually, enough energy is released to produce one molecule of ATP. After releasing the energy required to make one ATP molecule, the electrons are accepted by PS I. At this stage PS I also absorbs light and the electrons are once again elevated to the 'excited' state. ...read more.


The linking together of two Triose phosphate molecules produces glucose phosphate. The condensation of many molecules of glucose phosphate forms starch, the main end product of photosynthesis. It is the production of starch within the chloroplasts of the plant that facilitates the growth and development of plants. Hence a relation can be drawn between the growth of plants and the nature of the light to which the plant is exposed. A schematic diagram showing the different processes involved in photosynthesis. Hypothesis- The rate of photosynthesis will be greater if a plant is exposed to violet light (400-450 nm) or red light (630-700nm) as compared to green light (510-550nm). This is so because the Light Spectrum1 Apparatus List- 1. X Plant 2.7 Water Troughs 3.pH meter 4.Digital Balance 5.Thermometer 6.100 cm3 measuring cylinder 7. 6 large boxes 8.60 W colored bulbs (Violet, Blue, Green, Yellow, Orange and Red) 9. 6 Lamps 10.Measuring Cylinder 11.Lap Pro 12.Scissors 13.Water 1 www.gamonline.com/catalog/ colortheory/visible.php, 05/12/2004 ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Green Plants as Organisms section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Green Plants as Organisms essays

  1. Marked by a teacher

    Year 11 Module B4 Revision notes. Plants, photosythesis, biomass and the carbon cycle.

    4 star(s)

    plant than in the surrounding air, water escapes from the leaves through the stomata. Benefits of transpiration 1. The constant stream of water from the plant helps keep the plant cool 2. The plant is provided with a constant supply of water for photosynthesis 3.

  2. An Investigation into Water Loss from Plants.

    * Using the metal spatula spread an even layer of Vaseline across both the top and bottom surface of all leaves on the remaining 5 shoots and place in test tubes and put them in a test tube rack and label it 4.

  1. 'A study into the effect of phosphate concentrations on the growth of phytoplankton'.

    A tuft of cotton wool was placed in the neck of each flask which was then covered in tinfoil. 3.4. For the sterilisation of the solutions An autoclave, or if not available a pressure cooker would be suitable Autoclave tape The autoclave was checked to make sure it had a

  2. Investigating the growth of Lemna (Duckweed)

    Calcium is the next element to be removed from the list because, firstly, the interaction of Calcium and the cell walls are not entirely understood and therefore no detailed explanation can be made of the effects. Secondly, there is little external effects to be noted, thus making it hard to record.

  1. How temperature affects the rate of photosynthesis.

    At 25 oC a large amount of heat energy is provided by the increased temperature which provides a higher amount of kinetic energy (compared to the energy provided by 15 oC), which causes more vigorous vibrations within the reactant molecules and the increased velocity improves the chances of them colliding together.

  2. An investigation into the effects of different concentrations of lead chloride on the growth ...

    The aim of the preliminary work was to find out: 1. Which medium cress seeds grow best in. 2. The method in which to distribute the cress seed, on the most effective medium, to obtain maximum growth. 3. The range of concentrations of lead chloride to use in the experiment,

  1. Is photorespiration an effective mechanism for protecting against photoinhibition?

    Whilst this has provided us with good correlative data, what is really needed is an example where different levels of photorespiration compared to wild type are obtained and the overall contribution it has to protection. One such study was performed by Kozaki and Takeba (1996).

  2. Compare the effect of heavy and light oil on terrestrial plants.

    look black and sticky and evaporate slowly. If this kind of oil washes ashore, it makes a big mess that can last for a long time (weeks, months, or even years). While these oils can be very persistent, they are generally significantly less acutely toxic than light oils.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work