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B io Factsheet
September 1997 Number 4

Structure to function in eukaryotic cells
The cell surface membrane and the membranes which form organelles in enzymes and substrates to be concentrated and pH to be optimised.
eukaryotic cells all have the same basic structure, known as the fluid Membranes can therefore…

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Structure to function in eukaryotic cells Bio Factsheet


Structure and Function of Organelles Structure Function

Nucleus Double nuclear envelope To enclose and protect DNA (normally visible as
chromatin granules).


Nuclear pores. Allow entry of substances such as nucleotides for DNA
replication and exit of molecules such as mRNA during
protein…

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Structure to function in eukaryotic cells Bio Factsheet


Cell Structure Function

Endoplasmic Reticulum Endoplasmic reticulum is a Allows transport of substances within the cell.
system of hollow tubes and
sacs.

Rough endoplasmic reticulum The ribosomes on the rough endoplasmic reticulum may
(rer) is covered with ribosomes synthesise proteins which can…

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Structure to function in eukaryotic cells Bio Factsheet


Cell Structure Function

Lysosomes Lysosomes are vesicles which When released, these enzymes can break down old
contain hydrolytic enzyme, organelles, storage molecules or, indeed, the whole cell,
collectively known as when it dies.
lysozymes.



Chloroplasts. Double Membrane Allows the isolation of photosynthetic…

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Structure to function in eukaryotic cells Bio Factsheet


Practice Questions Answers

1. Outline the similarities between chloroplasts and mitochondria. Marking points are shown by semicolons

2. The diagram shows a generalised eukaryotic cell. 1. Both organelles are surrounded by two membranes;
Both show internal compartmentalisation - i.e. internal membranes
C…

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