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

Investigation into the effect of temperature on photosynthesis.

Extracts from this document...

Introduction

Helen Innes-Biology Coursework: Investigation into the effect of temperature on photosynthesis. Plan: I have previously investigated the effect of light intensity on the photosynthesis of pondweed. I would now like to adapt this experiment to investigate the influence of temperature. Method: In my previous experiment, we submerged a frond of pondweed in a beaker of water, and shone a microscope lamp on it, varying the distance and studying the results. To test the influence of temperature, we will need to arrange our apparatus so that the temperature can be varied without affecting the light intensity. * I will set up the pondweed in the beaker as before, but first placing it in an ice bath, till it has cooled to a suitable temperature, such as 5 C. ...read more.

Middle

* After this, I would set the beaker above a Bunsen burner on very low heat, and remove it every time the water reached a suitable temperature, initially perhaps 30 Celsius, and as before, rap it in foil, while taking two sets of results I will be taking measurements in temperature with a thermometer, and counting bubbles per minute, timing with a digital stop clock. I will then display these results in a chart, and plot them in a line graph of temperature against bubbles per minute. As I have already mentioned, to ensure accuracy I will: * Take two sets of results at each temperature to average * Keep the Bunsen burner low to retain constant light intensity I predict that, as the temperature is increased, the rate of photosynthesis will also increase, until a point at approximately 40 Celsius. ...read more.

Conclusion

All, enzymes have an optimum temperature where they work most effectively. This is where the reaction is hot enough for the reactant particles to be colliding frequently with the enzymes, but not too hot for the enzymes to survive. So when the water is at around 40 Celsius, the enzymes will be at their optimum temperature, and will be able to catalyse the photosynthesis of the pondweed at the highest possible rate. Above this temperature, the rate of photosynthesis will either remain the same or begin to drop off, due to the damage of enzymes. This is a typical graph of enzyme activity against temperature. Here are the results of Distance from lamp/ cm No. of bubbles per min 5 10 15 20 25 30 35 40 45 7 7 4 4 2 2 2 1 1 ...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

    An investigation into the effect of a germination inhibitor on the germination of seeds.

    3 star(s)

    Tomato Inhibitor Concentration (%) 0 10 25 50 75 100 Observed (O) 47 45 20 2 0 0 Expected (E) 19 19 19 19 19 19 D =O - E 28 26 1 -17 -19 -19 D2 = (O

  2. Investigating the effect of temperature on the rate of photosynthesis

    Number of bubbles released 10 18 30 240 50 12 70 7 Evaluation During our preliminary experiment, many errors occurred which would affect the accuracy and results of the experiment. Changing the following will do this: The room the experiment was carried out in was not dark enough, therefore light intensity is affected and cannot be controlled.

  1. An Investigation into Species Diversity with distance along a Pingo.

    The cumulative average for the species was calculated and these figures were plotted on a graph (raw data and graphs can be found in the Appendix) Results: Throw number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Number of squares Salad Burnette

  2. How temperature affects the rate of photosynthesis.

    in the experiment, the enzyme and substrate molecules have very low kinetic energy. Due to their slow movement, the numbers of collisions are low and therefore not enough water molecules or carbon dioxide and RuBP molecules that bind with their respective specific enzymes to form the enzyme substrate complex i.e.

  1. An investigation in to the effect of temperature on the release of pigment from ...

    I will prepare 21 test tubes with 10cm in each of them to make it fair. I will leave the test tubes onto test tube holders, whilst filling different test tubes with water. I will of course use a measuring syringe to measure the amount of water needed to go into the test tubes.

  2. How did Leamington develop into a typical spa town of the mid nineteenth century?

    Ralph Allen was the man who was able to reform the postal service. With the hefty profits he made, he enhanced the river navigation and made quarrying of pale Bath stone at Claverton and Combe Down. This stone was perfect for Bats architect John Wood.

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