Currently unavailable: for regular students
Degree: Graduate Medicine (Bachelors) - Nottingham University
BA HONS in Law from University of Cambridge (2012). I am currently studying graduate entry medicine at University of Nottingham, after having achieved a score of 67 in the GAMSAT entrance exam (A-Level standard physics and first year university level biology and chemistry). In my A-Levels I achieved 3 A grades in Biology, History and French and an A grade at AS level Chemistry.
For the past year I have regularly been tutoring Science GCSE and have been happy to see my students grades increase. I have previously enjoyed tutoring Biology to A Level standard and provided support with university admissions. Furthermore I have tutored at primary school level a young boy with learning difficulties, therefore have experience of tutoring at different abilities and for different needs. Finally as part of my graduate medicine course, group work and teaching plays a major part in my studies.
I understand that everybody learns in different ways and has different starting points. I am flexible in my approach, patient and encouraging. I enjoy studying science and hope this enthusiasm will aid the learning of others.
|Biology||A Level||£30 /hr|
|Chemistry||A Level||£30 /hr|
|-Personal Statements-||Mentoring||£30 /hr|
|GAMSAT||Uni Admissions Test||67|
Amber (Student) September 28 2016
Henry (Parent) May 15 2016
An enzyme is a protein catalyst.
A catalyst is a substance which alters the rate of a chemical reaction. (So it can speed up a chemical reaction).
The key thing about an enzyme is that it is not itself changed into another compound when it does this.
Therefore a catalyst is a substance which alters the rate of a chemical reaction without itself being permanently changed into another compound.
An enzyme is a protein catalyst that works in the body.
How does it do this?
It decreases the free energy of activation. Each chemical reaction has an activation energy that needs to be reached in order for the chemical reaction to take place. The enzyme lowers this energy requirement, so that the chemical reaction can occur at lower energy levels.
Enzymes are specific to different chemical reactions. Each individual enzyme will have a different role and different chemical reactions in the body to speed up.
This is known as enzyme specificity.
Reason for enzyme specificity:
Lock and Key Theory- This is the old theory of how enzymes exhibitied specificity. The idea that each enzyme has an active site (cluster of amino acids), that will only fit a specific type of substrate (the start substance in the chemical reaction). In the same way that a lock will only have one key that fits it.
This has given way to the:
Induced Fit Theory- It is now understood that enzymes are more flexible than the lock and key theory suggests. The induced fit theory suggests that there is more flexibility, which means that one enzyme can catalyse different reactions.
What factors influence the activity of an enzyme?
-Concentration of enzyme and substrate
At extremes of temperature and PH the enzyme can become denatured which means it is no longer able to perform its role.see more