MYTUTOR SUBJECT ANSWERS

451 views

What is the structure of DNA?

DNA is made up of two long chain backbones, bound together and forming a double helix shape. These backbones are made up of repeating units, each of which have the following structure:

A pentose sugar with a phosphate group bound on one side, and one of four bases bound on the other side. These bases are adenine, guanine, cystosine and thymine. These monomer units are called nucleotides, and are bound together by phosphodiester bonds between the phosphate group of one nucleotide and the OH group at the bottom of the other nucleotide. These form in a condensation reaction, so a molecule of water is produced.

The backbones join together by hydrogen bonds forming between the bases. Each base will only form hydrogen bonds and pair with one other base - guanine will pair with cytosine, adenine with thymine. 

Natalie H. GCSE Biology tutor, A Level Biology tutor, GCSE English Li...

1 year ago

Answered by Natalie, an A Level Biology tutor with MyTutor


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

164 SUBJECT SPECIALISTS

Sahil M. A Level Biology tutor, GCSE Biology tutor, A Level Chemistry...
£22 /hr

Sahil M.

Degree: Medicine (Bachelors) - Manchester University

Subjects offered:Biology, Spanish+ 3 more

Biology
Spanish
Maths
Chemistry
-Medical School Preparation-

“Hello! My name is Sahil and I am currently a medical student at the University of Manchester. I am really looking forward to tutoring you in Spanish, Chemistry, Biology or Maths as well as trying to help you during the difficult proce...”

£20 /hr

Rohan P.

Degree: Human genetics (Other) - Nottingham University

Subjects offered:Biology, Maths

Biology
Maths

“Friendly and approachable university student. Seek to ensure aiding of tutee in achieving personal goals, motivating them with their own progress.”

£22 /hr

Lucy W.

Degree: Physiotherapy BSc (Bachelors) - Cardiff University

Subjects offered:Biology, Physical Education

Biology
Physical Education

“Hi, I’m Lucy! I am an enthusiastic first year Physiotherapy student at Cardiff University with a passion for all things active and scientific. I thoroughly enjoy Biology and Physical Education and having just sat my exams in the summer...”

About the author

Natalie H.

Currently unavailable: for new students

Degree: Human Sciences BSc (Bachelors) - University College London University

Subjects offered:Biology, Science+ 4 more

Biology
Science
Human Biology
Extended Project Qualification
English Literature
English Language

“Hi, my name's Natalie. I'm studying Human Sciences BSc at University College London, a degree which I love because it includes my passions for both pure and social sciences!  This is reflected in the subjects I am able to tutor in - f...”

You may also like...

Posts by Natalie

What is a carbohydrate?

What is a concentration gradient?

What is diffusion?

What is personification and why would an author or poet use it?

Other A Level Biology questions

Understanding HIV, vaccines and monoclonal antibodies

I often understand the question and think I have answered it correctly, but I don't get all the marks for my answer. What am I doing wrong?

How do fish carry out gas exchange efficiently?

Describe the passive movement through diffusion and explain Fick's Law

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