MYTUTOR SUBJECT ANSWERS

209 views

Describe the structure of proteins

Proteins are polymers of amino acids, formed by long chains of amino acids joined together by peptide bonds. These bonds are formed by condensation reactions which allow two single amino acid molecules to join together forming a dipeptide molecule and water. There are four levels of protein structure. The primary structure is the order of amino acids in the peptide. Secondary structure is the folding of the polypeptide chain due to hydrogen bonding into an alpha helix structure, resembling a coiled spring, or a beta pleated sheet. Tertiary structure is the 3-D folding due to ionic and disulphide bonds between sulphur molecules in distant parts of the chain. These bonds may also be hydrogen bonds which occur between distant parts of the chain. The majority of proteins, such as enzymes, only exhibit primary, secondary and tertiary structure. Some proteins, such as haemoglobin, have quarternary structure which is when the protein has two or more polypeptide chains joined together.

Jena H. GCSE Biology tutor, A Level Biology tutor, GCSE Maths tutor, ...

10 months ago

Answered by Jena, an A Level Biology tutor with MyTutor

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

126 SUBJECT SPECIALISTS

£20 /hr

Sarah P.

Degree: Biology (Bachelors) - York University

Subjects offered: Biology

Biology

“I study Biology at the University of York and look forward to helping you to understand your Biology course, for upcoming GCSE and A-Level exams!”

£20 /hr

Bethany F.

Degree: Pharmacy (Masters) - Bath University

Subjects offered: Biology

Biology

“Hi there! I'm Bethany and I'm a first year undergraduate student studying Pharmacy at the University of Bath. I have a great passion for biology, which through tutoring, coincides brilliantly with my love of helping others. I am very ...”

MyTutor guarantee

£26 /hr

Lorenzo C.

Degree: Biomedical Sciences with Honours in Infectious Diseases (Bachelors) - Edinburgh University

Subjects offered: Biology, Physics+ 1 more

Biology
Physics
Chemistry

“Hey! I'm Lorenzo and I study Biomedical Sciences with an honours in Infectious Diseases at the University of Edinburgh. I'd be happy to help you with Biology, Chemistry and Physics at GCSE or at A-Level.  I have previous experience tu...”

About the author

Jena H.

Currently unavailable: for regular students

Degree: Medicine (Bachelors) - Nottingham University

Subjects offered: Biology, Maths+ 1 more

Biology
Maths
-Medical School Preparation-

“I am studying Medicine and my course has helped to deepen my interest in B iology, particularly Human Biology and I aim to share this love with you in my tutorials. I am friendly and love to help others and my tutorials will be fun,  in...”

You may also like...

Other A Level Biology questions

How to write an essay which will get me top marks in my exam

What is the difference between DNA and RNA?

What causes a myocardial infarction?

Outline the roles of synapses in the nervous system

View A Level Biology tutors

Cookies:

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

mtw:mercury1:status:ok