Explain why biological enzymes would stop working at temperatures higher than 45 degrees Celcius.

1. Biological enzymes are proteins, meaning they have specific shapes depending on bond interactions.

2. The active site of the protein is specific to a certain substrate (the thing being broken down).

3. At temperatures higher than body temperature, the proteins start to lose their structure, as the molecules get too excited.

4. This changes the shape of the active site.

5. The substrate can no longer fit into the active site and therefore the enzyme does not work.

MH
Answered by Masood H. Biology tutor

4314 Views

See similar Biology A Level tutors

Related Biology A Level answers

All answers ▸

Using your knowledge of osmosis, describe what happens to a red blood cell when they are placed in a beaker of distilled water.


Excessive dopamine causes schizophrenia. A drug used to treat schizophrenia binds to dopamine receptors in synapses. This binding does not lead to Action potentials. How can the drug used to treat schizophrenia bind to the same receptor as dopamine?


Draw and label a diagram of an animal cell?


How can I find the frequency of genotype Bb in a population given that the frequency of BB is 0.49? (Where B = dominant allele, b = recessive allele on the same gene).


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2025 by IXL Learning