Other
Practical Skills - Investigating factors affecting respiration
- Institution
- OCR
Research into the practical of investigating the factors affecting respiration, including results, conclusion, evaluations and bibliography for A2
[Show more]
Seller
Follow
Content preview
INTRODUCTION:The rate of respiration can be affected by many different factors; including temperature, oxygen
availability and the type of substrate. Temperature affects respiration by increasing the kinetic
energy, speeding up the rate at which respiration occurs. Different substrates affect respiration
based on their structure as a monosaccharide or a disaccharide. A low oxygen availability limits the
rate of respiration. I am going to investigate the effect of different substrates on the rate of
respiration.
HYPOTHESIS:
I believe that glucose will be the substrate producing the most amount of carbon dioxide gas as,
glucose is a monosaccharide. The disaccharides would take longer to produce the same amount of
carbon dioxide as they contain bonds between the molecules, which would need to be broken
before it can react.
VARIABLES:
Control: I will keep the sugar solutions and yeast at a constant temperature of 40 degrees to
prevent temperature from affecting the rate of respiration.
Independent: I will change the different sugar solutions in each reaction, in order to
investigate how substrate affects the rate of respiration.
Dependent: I will be measuring the volume of carbon dioxide gas produced in the gas
syringe.
EQUIPTMENT
10% sugar solution (glucose, fructose, sucrose, maltose)
5% yeast solution
50 cm3 Measuring cylinder (x2)
Gas syringe
Clamp
Clamp stand
Stopwatch
Conical flask
Delivery tube with a bung
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller zahrakhadija0312. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £6.78. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
60904 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now