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

Biology Scientific Investigation – Yeast Respiration

Extracts from this document...

Introduction

Scott Stenning 11W Biology Scientific Investigation - Yeast Respiration Obtaining Evidence Temperature (oC) Results 1 Results 2 Results 3 Average 20 2 2 2 2 25 2 2 2 2 30 2.8 3 2 2.6 35 5.9 3 3 3 40 4 4 5 4.3 50 6.5 6.5 5.5 6.2 60 7.2 6.9 7 7.1 70 9 5 3 80 1 0 0 My results table is different to what I planned. ...read more.

Middle

This Is because I realised that I need a wider range of results, so I chose to go above 60 oC and below 30oC. The reason I went up 80oC was to prove that the enzymes denature. ...read more.

Conclusion

A stopwatch was used to measure the time accurately to a 10th of a second. I used a measuring cylinder to count volume to the nearest cm3 . This made it more accurate than counting bubbles, as they are different volumes. This was about as accurate as I could possibly get it. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Molecules & Cells 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 AS and A Level Molecules & Cells essays

  1. Marked by a teacher

    Investigating respiration of maggots

    5 star(s)

    The third stage of the respiration process is known as the Krebs cycle, which is a closed pathway of enzyme-controlled reactions. The product of the Link reaction (Acetyl-CoA) combines with oxaloacetate, a 4-carbon compound, to form citrate, a 6-carbon compound.

  2. Marked by a teacher

    The Effect Of Temperature on the Respiration Of Yeast.

    5 star(s)

    I will control this by shacking the test tube before the experiment and every 60 seconds by placing the bung on the test tube and shake it 10 times by turning it upside down. I will then remove the rubber bung).

  1. A Level Biology revision notes

    o Below freezing point * Inactivated, not denatured * Regain their function when returning to normal temperature o Thermophilic: heat-loving o Hyperthermophilic: organisms are not able to grow below +70�C o Psychrophiles: cold-loving Enzymes - Heroes and Villains Analytical reagents * Made up of 2 enzymes (glucose oxidase and peroxidise)

  2. Catalyse Investigation

    The enzyme is denatured. To control this variable, the temperature was maintained at a fairly constant level that allowed the enzyme to work effectively (room temperature, approximately 23�C). This was achieved by using a test tube rack and tongs to handle the apparatus so that the heat from my hands did not affect the Catalase.

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