CIE A Level Biology復習筆記6.2.5 Gene Mutations
Gene Mutations & Their Effect on Polypeptides A?gene mutation?is a change in the sequence of base pairs in a DNA molecule that may result in an altered polypeptide Mutations occur?continuously ...
CIE A Level Biology復習筆記6.2.4 Transcription
Template & Non-Template Strands In the?transcription?stage of protein synthesis, the section of the DNA molecule where the gene is located (the gene coding for a particular polypeptide)?unwinds...
CIE A Level Biology復習筆記6.2.3 Constructing Polypeptides
Constructing Polypeptides: Transcription & Translation A?gene?is a?sequence of nucleotide bases?in a DNA molecule that?codes for the production of a specific sequence of amino acids, that in tu...
CIE A Level Biology復習筆記6.2.2 The Universal Genetic Code
The Universal Genetic Code A?gene?is a?sequence of nucleotide bases?in a DNA molecule that?codes for the production of a specific sequence of amino acids, that in turn make up a?specific polypeptid...
CIE A Level Biology復習筆記6.2.1 From Gene to Polypeptide
From Gene to Polypeptide A?gene?is a?sequence of nucleotides?that forms part of a DNA molecule (one DNA molecule contains many genes) This sequence of nucleotide bases (the gene)?codes for the prod...
CIE A Level Biology復習筆記6.1.4 The Structure of RNA
RNA Structure Like DNA, the nucleic acid RNA (ribonucleic acid) is a?polynucleotide?– it is made up of?many nucleotides?linked together in a?long chain Like DNA, RNA nucleotides contain the nitroge...
CIE A Level Biology復習筆記6.1.3 Semi-Conservative DNA Replication
Semi-Conservative DNA Replication DNA replication occurs in preparation for?mitosis, when a parent cell divides to produce two genetically identical daughter cells – as each daughter cell contains ...
CIE A Level Biology復習筆記6.1.2 The Structure of DNA
DNA Structure The nucleic acid DNA is a?polynucleotide?– it is made up of?many nucleotides?bonded together in a?long chain A DNA nucleotide DNA molecules are made up of?two polynucleotide strands?l...
CIE A Level Biology復習筆記6.1.1 Nucleotides
Nucleotide Structure Nucleic acids?such as?DNA?(deoxyribonucleic acid) and?RNA?(ribonucleic acid) are?macromolecules?(giant molecules) Like proteins (polypeptides) and carbohydrates (polysaccharide...
CIE A Level Biology復習筆記5.2.2 Observing Mitosis
Mitosis in Root Tips: Observing & Drawing Growth in plants occurs in specific regions called?meristems The root tip meristem can be used to study?mitosis The root tip meristem can be found?just...
CIE A Level Biology復習筆記5.2.1 The Stages of Mitosis
Mitosis: The Stages Mitosis is the process of nuclear division by which?two genetically identical daughter nuclei?are produced that are also genetically identical to the parent cell nucleus (they h...
CIE A Level Biology復習筆記5.1.6 How Tumours Form
How a Tumour Forms Cancers demonstrate how important it is that?cell division?is?precisely controlled, as cancers arise due to?uncontrolled mitosis Cancerous cells divide repeatedly and uncontrolla...
