MYTUTOR SUBJECT ANSWERS

699 views

What is an enzyme and what effect does temperature have on enzyme activity? (6 marks)

An enzyme is a globular protein that acts as a biological catalyst.  They work by reducing the activation energy of chemical reactions, which increases the rate of reactions.

All enzymes have an optimum temperature.  

The rate of reaction increases as temperature increases, up to the optimum temperature.  This is because both the enzyme and substrate molecules have more kinetic energy so move around faster and are more likely to collide.  A collision creates an enzyme substrate complex, which triggers the catalytic effect.  

As temperature rises above the optimum temperature the particles with the molecule vibrate more energetically, which cause the bonds to break.  This means that the active site changes shape and the enzyme becomes denatured.  Enzyme substrate complexes can no longer form and the catalytic effect is lost.   

Isabel O. A Level Biology tutor, A Level Chemistry tutor, A Level Che...

2 years ago

Answered by Isabel, an A Level Biology tutor with MyTutor


Still stuck? Get one-to-one help from a personally interviewed subject specialist

231 SUBJECT SPECIALISTS

£26 /hr

Sohini C.

Degree: Medicine,MBBCh (Bachelors) - Cardiff University

Subjects offered:Biology, Science+ 3 more

Biology
Science
Maths
-Personal Statements-
-Medical School Preparation-

“Hi, I'm Sohini. I'm a fourth year medical student at Cardiff uni and keen to help students with Science and Maths GCSE subjects. I can also help with medical school applications, especially personal statements and interviews. ”

£30 /hr

Zoe B.

Degree: Bsc Psychology (Bachelors) - Exeter University

Subjects offered:Biology, Psychology

Biology
Psychology

“2nd Year Psychology Undergraduate at Exeter. 1 year experience tutoring A-level Biology and Psychology”

£24 /hr

Pooja D.

Degree: Medicine (Bachelors) - Birmingham University

Subjects offered:Biology, Science+ 6 more

Biology
Science
Physics
Maths
Chemistry
.UKCAT.
-Personal Statements-
-Medical School Preparation-

“I have tutored for the past 4 years and have gathered many ways of teaching concepts to students in a way that is easily-digestible and understandable.”

About the author

Isabel O.

Currently unavailable: for new students

Degree: Human Biosciences (Bachelors) - Exeter University

Subjects offered:Biology, Geography+ 1 more

Biology
Geography
Chemistry

“About me: I graduated from the University of Exeter this summer with a 2:1 in Human Bioscience.  I am passionate about science and am currently applying to do a PhD.   I am enthusiastic and patient and I enjoy the challenge of ex...”

MyTutor guarantee

|  3 completed tutorials

You may also like...

Other A Level Biology questions

What is Exocytosis?

How does the body increase heart rate in response to exercise?

How do organisms generate ATP?

Please can we go over the process of spermatogenesis?

View A Level Biology tutors

We use cookies to improve your site experience. By continuing to use this website, we'll assume that you're OK with this. Dismiss

mtw:mercury1:status:ok