Factors Effecting Respiration

Question 1

Describe a respirometer

Answer 1

Airtight tube
With a respiring organism e.g. Yeast
Sodium hydroxide to absorb CO2
Capillary tube with a drop of coloured liquid
As O2 is taken up by photosynthesis the bubble will move closer to the sample (NaOH will uptake CO2 so bubble wont be pushed)

Question 2

What is the other method for measuring rate of respiration other than a respirometer?

Answer 2

Using a dye as a electron acceptor 
Make sure a sample of the dye is same twmperture as the culture of single celled organisms
Add dye 
Shake
Record time taken to decolurise

Question 3

Why is it important to have a control variable when using a dye to measure respiration

Answer 3

The decolurising is somewhat subjective

Question 4

Give the equations for surface area and volume of the following
Cylindrical prism
Sphere

Answer 4

Cylindicral prism: surface area is 2 X pi X r X h. Volume is PiXr^2Xh

For a sphere: surface area is 4 X Pi X R^2
Volume 4/3 X pi X r^3