Water & Mineral Ion Transport: Pathways & Mechanisms Within a plant?mineral ions?and?organic compounds?(eg. sucrose) are transported by being?dissolved in water. The?dissolved mineral ions?...
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 ...
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...
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...
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...
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 ...
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...
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...
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...
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...
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...
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 ...
