B1 DNA OCR Gateway (9-1)

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  • Created by: Aleena
  • Created on: 03-04-18 14:06
What does DNA stand for?
Deoxyribonucleic Acid
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What is DNA?
The material inside the nucleus of cells carrying the genetic information of a living organism/being
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What is DNA stored as in the nuclei of cells?
DNA is stored as Chromosmes
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What are Chromosomes?
Long molecules of coiled up DNA-divided into shorter sections-Genes
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What is the structure of DNA?
Double Helix-a double stranded spiral
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What are the 2 strands of DNA made up of?
Lots of Nucleotides joined together in a long chain
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How does this make DNA a polymer?
Polymers are large complex molecules composed of long chains of monomers joined together. DNA is a polymer made up of nucleotide monomers
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What are Monomers?
Small, basic molecular units
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What makes up a Nucleotides?
These nucleotides consist of a deoxyribose sugar, phosphate and base
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What are the 4 types of Bases?
Adenine(A),Cytosine(C),Guanine(G) and Thymine(T)
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What are the 2 complementary pairs for bases?
A&T or C&G
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What is this called?
Complementary Base Pairing
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How do complementary bases join with eachother?
Each base forms cross links to a base on the other strand-keeps DNA strands wound tightly together
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How is the sugar phosphate backbone formed?
Nucleotides are linked together to form strands by strong covalent bonds between the deoxyribose sugar of one nucleotide and the phosphate of the next nucleotide. These strong bonds form a sugar-phosphate backbone.
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DNA is unique for everyone?True?
Yes-apart from identical twins
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As DNA is unique for majority of people,why is this beneficial for DNA fingerprinting?
This is why people can be identified using DNA fingerprinting. DNA can be cut up and separated, which can form a 'bar code' that is different from one person to the next.
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Other cards in this set

Card 2

Front

What is DNA?

Back

The material inside the nucleus of cells carrying the genetic information of a living organism/being

Card 3

Front

What is DNA stored as in the nuclei of cells?

Back

Preview of the front of card 3

Card 4

Front

What are Chromosomes?

Back

Preview of the front of card 4

Card 5

Front

What is the structure of DNA?

Back

Preview of the front of card 5
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