CELL MEMBRANE 0.0 / 5 ? BiologyCellular processes and structureA2/A-levelAQA Created by: marie79Created on: 24-09-15 12:47 CELL MEMBRANE STRUCTURE: 2 LAYRES OF PHOSPHOLIPIDS RECEPTERS ON THE OUTER LAYER FUNCTION: SELECTIVELY PERMEABLE MEMBRANE ORGANELLESIN SIDE THE CELL ALSO HAVE A MEMBRANE 1 of 7 NUCLEUS STRUCTURE: ROUND IN SHAPE DOUBLE MEMBRANE (NUCLEAR ENVELOPE) NUCLEAR PORES DNA NUCLEOLUS FUNCTION: CONTAINS DNA CONTROLS ACTIVITIES INSIDE THE CELL 2 of 7 MITROCHONDRION STRUCTURE: OVAL SHAPED DOUBLE MEMBRANE INNER MEMBRANE IS CALLED 'CRISTAE' CRISTAE HAS A LARGE SURFACE AREA MATRIX CONTAINS ENZYMES FUNCTION: 'POWER HOUSE' OF THE CELL WHERE AEROBIC RESPIRATION REACTIONS TAKE PLACE PRODUCES ENERGY IN THE FORM OF ATP 3 of 7 ENDOPLASMIC RETICULUM STRUCTURE: NETWORK OF MEMBRANES 2 TYPES OF ER ROUGH ER IS COVERED IN RIBOSOMES FUNCTION: ROUGH ER - TRANSPORTS SYNTHESISED PROTEINS SMOOTH ER - PRODUCES AND TRANSPORTS LIPIDS 4 of 7 LYSOSOME STRUCTURE: SAC SHAPED SINGLE MEMBRANE CONTAINS DIGESTIVE ENZYMES CONTENTS ARE ACIDIC ENZYMES HAVE A LOW OPTIMUM P.H. LEVEL FUNCTION: BREAKS DOWN UNWANTED MOLECULES AND CELLS 5 of 7 GOLGI APPARATUS STRUCTURE: STACK SHAPED FLATTENED MEMBRANE SMALLER VESICLES AROUND IT FUNCTION: TRANSPORTS AND CHEMICALLY CHANGES THE SUBSTANCES IN IT PRODUCES LYSOSOMES SECRETIVE CELLS I.E. PANCREATIC CELLS CONTAIN A LARGE AMOUNT OF GOLGI APP 6 of 7 RIBOSOMES STRUCTURE: CONTAINS A LARGE AND A SMALL SUB UNIT MADE OF PROTEIN AND RNA CAN BE FREE FLOATING... OR ATTATCHED TO ENDOPLASMIC RETICULUM FUNCTION: SITE OF PROTEIN SYNTHESIS 7 of 7
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