Take Class 8 Tuition from the Best Tutors

  • Affordable fees
  • 1-1 or Group class
  • Flexible Timings
  • Verified Tutors

Biology - DNA(Deoxyribonuclic Acid)

Nithya S.
14/11/2016 0 0

How the strands of thread forms a cloth and creates the cloth’s color, shape and designs same way a DNA is responsible for the development and functioning of living organisms.

An organism is made up of cells; cells have Chromosomes; chromosomes has DNA molecules.

Structure of DNA

1.    DNA (Deoxyribonucleic Acid) is composed of two Polynucleotide Strands (the polymers of nucleotides). The Nitrogenous Bases in DNA store the instructions for every feature of the entire organism.

2.    The two polynucleotide strands run 'antiparallel' to each other i.e., run in opposite directions. The antiparallel strands twist in a complete DNA structure, forming a Double Helix.

Complementary Base Pairings

3.    The strands are held together by 'paired' Hydrogen Bonds between the Nitrogenous Bases that are opposite each other. A Purine will only pair with a Pyrimidine, the Adenine Purine will only pair with the Thymine Pyrimidine (A-T) and the Guanine Purine will only pair with the Cytosine Pyrimidine (G-C). These base pairings are termed Complementary Base Pairings.

Reason behind the structure  

4.    The reason that Purines will only bond with Pyrimidines is that Purines are larger molecules with a double ring structure so in order to ensure that the polynucleotide strands are equally spaced apart, the larger Bases must pair with the smaller bases.

0 Dislike
Follow 0

Please Enter a comment


Other Lessons for You

Effective learning
Dear all, Are you one of them who try to learn their lessons continuously for more than an hour? Do you get bored? Are you not able concentrate after some time? Not able to remember what you have learnt?...

How to you Squaring a number ending in 6
Ex 66^2 =_________.a) Write down 6.b) 2 x (6 + 1) + 1 = 15. Write 5, carry *1.c) 6 x (6 + 1) = 42 + *1 = 43. Write 43.d) The answer is 4356. Ex 86^2 =_________.a) Write down 6.b) 2 x (8 + 1) + 1 =...

Maths_Exponents and Power
Exponential Form = 100 = 102, where 2 is the power of 10. Laws of exponents: a-m = 1/ am a m * an = am*n am * an = am*n (am)n = am*n am / bm = (a/b)m a0= 1 (a / b)-m = (b/a)m (-1)odd = -1 (-1)even = 1 ( am / an ) = am-n

Amrtha S.

1 0

Newton's laws of motion
Newton's laws of motion are three physical laws that, together, laid the foundation for classical mechanics. They describe the relationship between a body and the forces acting upon it, and its motion...

What is a polynomial... In general 'poly' means many and 'nomials' means terms. That means polynomial means having many terms. But this is not the definition, it's just the meaning of the word. Now...

Shiva Chary

0 0

Looking for Class 8 Tuition Classes?

The best tutors for Class 8 Tuition Classes are on UrbanPro

  • Select the best Tutor
  • Book & Attend a Free Demo
  • Pay and start Learning

Take Class 8 Tuition with the Best Tutors

The best Tutors for Class 8 Tuition Classes are on UrbanPro

This website uses cookies

We use cookies to improve user experience. Choose what cookies you allow us to use. You can read more about our Cookie Policy in our Privacy Policy

Accept All
Decline All

UrbanPro.com is India's largest network of most trusted tutors and institutes. Over 55 lakh students rely on UrbanPro.com, to fulfill their learning requirements across 1,000+ categories. Using UrbanPro.com, parents, and students can compare multiple Tutors and Institutes and choose the one that best suits their requirements. More than 7.5 lakh verified Tutors and Institutes are helping millions of students every day and growing their tutoring business on UrbanPro.com. Whether you are looking for a tutor to learn mathematics, a German language trainer to brush up your German language skills or an institute to upgrade your IT skills, we have got the best selection of Tutors and Training Institutes for you. Read more