CIE A Level Biology復習筆記7.1.4 Phloem Sieve Tube Elements
Phloem Sieve Tube Elements & Companion Cells: Structure & Function The function of?phloem?tissue in a plant is to: Transport?organic compounds (assimilates), particularly sucrose, from the ...
CIE A Level Biology復習筆記7.1.3 Xylem Vessels Elements
Xylem Vessel Elements: Structure & Function The functions of?xylem?tissue in a plant are: Vascular tissue that?transports?dissolved minerals and water around the plant Structural?support Food s...
CIE A Level Biology復習筆記7.1.2 Xylem & Phloem Distribution
Xylem & Phloem Distribution Xylem The functions of?xylem?tissue in a plant are: Vascular tissue that carries?dissolved minerals?and?water?up?the plant Structural support Food storage Xylem tiss...
CIE A Level Biology復習筆記7.1.1 Plant Transverse Sections
Transverse Sections: Stems, Roots & Leaves Dicotyledonous (dicots) plants Dicotyledonous (dicots) plants have: Seeds that contain two cotyledons (seed leaves) Network of veins Leaves that typic...
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...
