Nucleic acids
- Created by: Holly Morris
- Created on: 02-06-13 13:38
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- Nucleic acids
- contains genetic information - all the instructions you need to grow and develop from a fertilized egg to a fully grown adult
- DNA nucleotides have a paired structure, which makes it easier to copy itself, called self replication
- DNA copies itself before cell division so that each new cell has the full amount of DNA
- hydrogen bonds between the two polynucleotide DNA strands break. the helix unzips to form 2 single strands
- each original strand acts as a template for a new strand. free-floating DNA nucleotides to join to the exposed bases on each orignal template strand by complementary base pairing
- the nucleotides on the new strand are joined together by the enzyme polymerase. hydrogen bonds form between the bases on the original and new strand
- each new DNA molecule contains one strange from the original DNA molecule and one new strand
- the nucleotides on the new strand are joined together by the enzyme polymerase. hydrogen bonds form between the bases on the original and new strand
- 'semi conservative' replication because half of the new strands of DNA are strands from the original piece of DNA
- each original strand acts as a template for a new strand. free-floating DNA nucleotides to join to the exposed bases on each orignal template strand by complementary base pairing
- hydrogen bonds between the two polynucleotide DNA strands break. the helix unzips to form 2 single strands
- DNA copies itself before cell division so that each new cell has the full amount of DNA
- contains genes - sections of DNA that code for a specific sequence of amino acids
- nucleotides
- DNA is a polynucleotide -its made up from nucleotides joined together
- each nucleotide is made from a deoxyribose sugar, a phosphate group and a nitrogen containing base
- bases can vary; Cytosine, Adenine, Thymine, and Guanine
- complimentary base pairing
- a purine attaches to a pyrimidine
- purine A and G
- pyrimidine T and C
- Adenine and Thymine
- 2 hydrogen bonds
- Cytosine and GUanine
- 3 hydrogen bonds
- a purine attaches to a pyrimidine
- DNA nucleotides have a paired structure, which makes it easier to copy itself, called self replication
- used to make proteins from the instructions contained within the DNA
- very similar to DNA but 3 major differences:
- The sugar in RNA nucleotides is a ribose sugar
- the nucleotides form a single polynucleotide strand
- Uracil replaces Thymine as a base
- very similar to DNA but 3 major differences:
- contains genetic information - all the instructions you need to grow and develop from a fertilized egg to a fully grown adult
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