Structure of RNA and DNA

Bee Brittain
Flashcards by Bee Brittain, updated more than 1 year ago
Bee Brittain
Created by Bee Brittain almost 4 years ago


Based on my '2.1 Structure of RNA and DNA' mind map which can be found here: :)

Resource summary

Question Answer
Name the 3 components of a DNA nucleotide 1)Phosphate Group 2) Deoxyribose sugar 3) 1 of the 4 bases: Adenine, Thymine, Guanine and Cytosine
Name the three components of a RNA nucleotide 1) Phosphate group 2) Ribose sugar 3) 1 of the 4 bases: Cytosine, Guanine, Adenine or Uracil
A dinucleotide is formed in what type of reaction? Condensation
What bond is formed between two mononucleotides when they are joined together? Phosphodiester bond
Where on the two mononucleotides does the phosphodiester bond form? Between the sugar of one mononucleotide and the phosphate group of another
When lots of mononucleotides join together they form what? A polynucleotide
What does DNA stand for? And what is its function? DNA = Deoxyribonucleic Acid DNA stores genetic information.
What does RNA stand for? And what is its function? RNA = Ribonucleic Acid RNA transfers genetic information from DNA to the ribosomes
What are ribosomes made of? RNA and proteins
Name and pair up the four bases found in DNA Adenine & Thymine Cytosine & Guanine
How many polynucleotide strands are there in DNA structure? 2
How are the strands of DNA held together? There are Hydrogen bonds between the nucleotide bases
How many hydrogen bonds form between adenine and thymine? 2 hydrogen bonds
How many hydrogen bonds form between Cytosine and Guanine? 3 Hydrogen Bonds
The two strands in DNA go in opposite directions, this is known as them being ____________. Anti-parallel
Describe 2 differences between the structure of DNA, and the structure of RNA RNA has shorter polynucleotide chains than DNA. RNA is single stranded, where as DNA has two anti-parallel chains.
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