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Sunday, 23 September 2012

F211 Module 1 Cell Ultrastructure

Weekly Learning Outcomes

Describe and interpret drawings and photographs of eukaryotic cells as seen under an electron
microscope and be able to recognise the following structures: nucleus, nucleolus, nuclear envelope,
rough and smooth endoplasmic reticulum (ER), Golgi apparatus, ribosomes, mitochondria,

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called division of labour. The different organelles work together in a cell, each contributing its part to the
survival of the cell.
Movement and Stability in Cells

Cytoskeleton ­ Cells contain a network of fibres made of
protein. These fibres keep the cell's shape stable by providing n
internal framework…

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Undulipodium Moves sperm cells and gametes of
(plural undulipodia) some plants (e.g. mosses and ferns)

Organelles without Membranes surrounding them

Organelle Function(s) Key Points
Ribosome Amino acids assembled to make proteins On rough endoplasmic reticulum or
free in cytoplasm
Centriole Assembles microtubules for the Centrioles replicate before division so

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Sewage treatment and natural recycling rely on bacterial cells digesting and respiring dead and waste


Amino acid ­ Are organic compounds that contains both an amino acid group (-NH2) and a carboxyl group
(-COOH). Amino acids are the monomers of protein molecules.

ATP ­ Adenosine triphosphate ­ a…

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Eukaryote - An organism having cells with a nucleus and membrane-bound organelles.

Eukaryotic cell ­ Cells that have a nucleus inside a nuclear envelope, and other membrane-bound
Gene - A length of DNA that carries the code for the synthesis of one (or more) specific polypeptides.

Glucose - A…

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Respiration ­ The process in which energy is released from complex molecules.

Ribosome ­ The organelle, made of two subunits, on which proteins are synthesised inside the cell.

RNA ­ Plays a part in the synthesis of proteins within cells.

Spindle ­ A structure consisting of protein fibres found in…


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