Unit 2 Section 2.1 DNA and RNA
- Created by: stephloupoole
- Created on: 22-04-14 20:29
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- DNA and RNA
- DNA function
- DNA contains your genetic information,
- DNA structure
- DNA has a Double Helix Structure.This means that a DNA molecule is formed from two separate strands which wind around each other to form a spiral
- The Strands are Polynucleotides, they are made up of lots of nucleotides joined together in a long chain
- DNA molecules are very long and are coiled up very tightly,
- The Strands are Polynucleotides, they are made up of lots of nucleotides joined together in a long chain
- Nucleotide Structure,
- Each Nucleotide is made fom a phosphate group, a pentose sugar and a nitrogenous base
- the sugar in DNA is a deoxyribose sugar
- each nucleotide has the same sugar and phosphate
- the base on each nucleotide can vary there are 4 types of base
- Adenine
- Thymine
- Cytosine
- Guanine
- Purine
- Adenine
- Purine
- the base on each nucleotide can vary there are 4 types of base
- each nucleotide has the same sugar and phosphate
- the sugar in DNA is a deoxyribose sugar
- Each Nucleotide is made fom a phosphate group, a pentose sugar and a nitrogenous base
- Polynucleotide Strands
- Many Nucleotides join together to form polynucleotide strands
- the nucleotides join up between the phosphate group of one nucleotide and the sugar of another creating a
- Sugar - Phosphate Backbone
- Complementary base pairing
- each base can only join with one particular partner
- A and T always Pair
- C and T always Pair
- each base can only join with one particular partner
- DNA has a Double Helix Structure.This means that a DNA molecule is formed from two separate strands which wind around each other to form a spiral
- RNA Function
- The Nucleic Acid RNA is similar in structure to DNA. there are several different types of RNA, each with a different function.
- one of the main types is mRNA - it is used to make proteins from the instructions contained within DNA
- The Nucleic Acid RNA is similar in structure to DNA. there are several different types of RNA, each with a different function.
- RNA Structure
- like DNA, RNA is made of Nucleotides that contain one of four different bases. the Nuclotides also form a polynucleotide strand with a sugar - phosphate backbone
- But the structure of RNA differs from DNA in three main ways
- The sugar in RNA nucleotides is a ribose sugar
- The nuclotides form a single polynucleotide strand
- Uracil replaces Thymine as a base, Uracil always pairs with adenine in RNA
- But the structure of RNA differs from DNA in three main ways
- like DNA, RNA is made of Nucleotides that contain one of four different bases. the Nuclotides also form a polynucleotide strand with a sugar - phosphate backbone
- DNA function
- Pyrimidines
- Thymine
- Cytosine
- Purine
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