• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month
Page
  1. 1
    1
  2. 2
    2
  3. 3
    3
  4. 4
    4
  5. 5
    5
  6. 6
    6
  7. 7
    7
  8. 8
    8
  9. 9
    9
  10. 10
    10

cellular respiration

Extracts from this document...

Introduction

Extended Experimental Investigation Respiration Introduction: All living things respire. In fact, respiration is one of the most basic characteristics of living organisms so that if an object does not respire, it's not considered living. Respiration involves a complex series of chemical reactions where sugars are broken down to release energy by the use of oxygen. Respiration is the energy producing process of breathing, by which an organism supplies its cells with oxygen and relieves itself of carbon dioxide. The most effective way for cells to harvest energy stored in food is through cellular respiration, which is a metabolic process that captures the chemical energy from foods and converts them into ATP. The energy required to power living cells comes from the sun; plants capture this energy and convert it to organic molecules. In respiration, plants and animals convert glucose back into energy for growth. The chemical equation shows that the photosynthates from photosynthesis are combined with oxygen. The chemical equation for the process of respiration is: C6H12O6 + 6O2 <====> 6CO2 + 6H2O + energy The process is similar to the oxidation that occurs when wood is burned, producing heat. When compounds combine with oxygen, the process is referred to burning. ...read more.

Middle

test tube was then placed in the stand and clamp and tilted horizontally Step 10: The experiment was then left for 5 minutes for the soda lime to absorb the existing CO2 in the test tube Step 11: After the 5 minutes was up a small amount of red die was sucked up into the pipette by using the syringe Step 12: The red die would then move down the test tube indicating the respiration of the mung beans Step 13: After 5 minute intervals results on how far the red dye had moved were recorded Step 14: Steps 2-13 were repeated until all appropriate experiments were performed (Source: John Miller) Safety: During the experiment, there were very little safety requirements. Before any experiments were undertaken, risks assessments were to be completed and handed in. Normal lab procedures are to be followed such as wearing safety glasses, safety gloves, shoes ect. The main safety precaution was the soda lime (mixture of calcium hydroxide and sodium hydroxide), which is a strong base and will cause irritation and burns upon contact with skin. If you come in contact with soda lime, thoroughly wash with soap for 5 minutes and alert nearby teacher. ...read more.

Conclusion

- 20 mungbeans 5 minutes (cm moves) Test 1 2.3cm Test 2 4.2cm* Test 3 2.22cm Average 2.26 Tuesday 28.04.09 - Day 2 (2 day old germinated) - 20 mungbeans INVALID 5 minutes (cm moves) Test 1 0.35 Average Wednesday 29.04.09 - Day 3 (3 day old germinated) - 20 mungbeans 5 minutes (cm moves) Test 1 2.1cm Test 2 1.8cm Test 3 2.7cm Average 2.2 Thursday 30.04.09 - Day 4 (4 day old germinated) - 20 mungbeans 5 minutes (cm moves) Test 1 2.9cm* Test 2 1.8cm Test 3 1.7cm Test 4 1.7cm Test 5 1.8cm Test 6 1.8cm Test 7 1.6cm Test 8 1.7cm Test 9 1.6cm Average 1.7 Friday 01.05.09 - Day 5 (5 day old germinated) - 20 mungbeans 5 minutes (cm moves) Test 1 1.1cm Test 2 1.2cm Test 3 1.2cm Average 1.2 Tuesday 05.05.09 - Day 6 (non-germinated) - 20 mungbeans INVALID 5 minutes (cm moves) Test 1 1.9cm Test 2 0.7cm Average Wednesday 06.05.9 - Day 7 (non-germinated) - 20 mungbeans 5 minutes (cm moves) Test 1 1.8cm Test 2 1.0cm Test 3 0.3cm* Average 1.4 Wednesday 06.05.9 - Day 7 (2 day old germinated) - 20 mungbeans 5 minutes (cm moves) Test 1 2.6cm * Test 2 1.7cm Test 3 1.3cm Average 1.5 ...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 Living Things in their Environment 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 Living Things in their Environment essays

  1. Marked by a teacher

    In this experiment, mung bean seedlings and Brine shrimp eggs were used to study ...

    4 star(s)

    Introduction : Global warming is the general increase of temperature in the environment. It is the increase in mean temperature of the Earth's near surface air and oceans since the mid-20th century and it is predicted to be increasing continuously.

  2. Investigating Seed Germination. Hypothesis If there is water, oxygen and a suitable ...

    Variables Independent Variable: --> Conditions of surroundings - The conditions of the surroundings for the seed germination will be altered through changing the different conditions needed for germination: water, oxygen and temperature. There will be four different set ups. The four set ups would have the conditions: Set up 1)

  1. The comparison of bacterial content in a range of milks.

    Wash thoroughly with soap and cold water. Any non-chemical hazards and precautions to be taken When using the glass apparatus, special care must be taken as these can break easily and cause injury Signed (student) Signed (teacher) Disposure of residues The sodium hydroxide is dilute enough to pour down the sink, along with the milk.

  2. Branded Bleach is more effective at killing E. coli than Non branded bleach - ...

    Petri dish as far from the edges as possible, closing the cover as soon as possible. 12) Heat the forceps again pick up another paper disc and immerse it in the 100% non-branded bleach solution. Deposit the disc in the same Petri dish away from both the other disc and the edges.

  1. An Investigation into the water quality of the River Banwell in

    A river needs to have a good level in all three tests to sustain a clean and diverse ecosystem. The environment agency therefore issues the lowest grade out of them. Below are the test results for the year of 2002; this year was given a grade D.

  2. Literature Review on Germination of Orchid Seeds.

    found that orchids could be germinated asymbiotically on special media3. Most orchids are now grown in this manner and many clones are cultured from meristems. The Knudson medium has undergone some changes to provide for different species and different methods of culturing orchids.

  1. To see how Blowfly larvae (Calliphora) react to light.

    a region of the paper circle where the intensity of the light is not as strong, generally moving into the negative region, with a few in the neutral zones. The reason for this is that the larvae needs to avoid the possibility of becoming prey to a predator, just before it is due to go into the pupal state.

  2. Dissecting an Owl Pellet Lab

    This is because the predator has a variety of possible meals to eat which gives it several options. If the predator cannot find one species or the prey goes extinct, the predator will not go extinct because it will have numerous alternatives.

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