Investigating Respiration in Yeast

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Investigating Respiration in Yeast

Aim

To investigate the effect of different concentrations of glucose on respiration in Yeast.

Introduction

Yeast

Yeast is simply a single-celled fungus, found on the surface of fruit, feeding on sugar. Yeast can multiply itself by a process called budding. A large number can be formed in a short time.

Respiration

Respiration is basically the breakdown of glucose to feed a cell, supplying it with energy. There are two types of respiration: aerobic and anaerobic respiration. Aerobic respiration requires oxygen to carry out, but anaerobic respiration does not need oxygen. Anaerobic respiration causes lactic acid, which contributes to cramp. The equation of aerobic respiration is:

Glucose

+

Oxygen

-->

Carbon Dioxide

+

Water

+

Energy

C6H12O6

6O2

6CO2

6H2O

Experiment

We can measure respiration with a simple experiment - which is the one I am doing. We measure the volume of Carbon Dioxide with different glucose concentrations. This gives us our results.

Variables

I will measure the rate of Carbon Dioxide produced. This is the dependent variable. I will change