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Organelle Function + Structure

Nucleus Fact File-The largest organelle-A+P

Feature Structure Function
Chromatin Stains dark red in the nucleus Consists of DNA and proteins
during interphase of mitosis Has instructions for making
and meiosis. proteins, some of which
Consists of nucleic acids and regulate the cell's activities
proteins. Condenses into…

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Nucleolus Dense spherical structure The nucleolus makes RNA and
The RNA, which will be made
into ribosomes, is synthesised in
the nucleolus.
o Ribonucleic acid a single
stranded polynucleotide
molecule that exists in
three forms. Each form
plays a part in the
synthesis of proteins
within cells

Endoplasmic Reticulum…

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lipid is metabolised.

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Structure Function
Tiny organelles The site of protein synthesis.
No membrane Await coded information (mRNA) from the
Some are bound to ER others are free in nucleus to assemble proteins from amino
the cytoplasm acids.
The proteins (which include enzymes) that
are synthesised then move into the cavities

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Structure Function
Small tubes of protein fibres Take part in cell division
Pair of them next to the nucleus of animal They are involved in the formation of
cells spindle fibres used in mitosis
These move chromosomes during nuclear

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Chloroplasts P + some protactists

Feature Structure Function
Outer and Inner Separated by a fluid-filled space Photosynthesis reactions
membrane Inner membrane is continuous with a take place in the
network of thylakoids membranes and stroma.
Thylakoids Elaborate network of flattener Light energy is used to
membrane sacs drive photosynthesis

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Then packages modified proteins into
vesicles that may be secreted
Some cells go to the surface of the cell
ready to be secreted.

Lysosomes P+A

Structure Function
Spherical sacs surrounded by a single Lysosomes contain powerful digestive
membrane enzymes-break down materials
White blood cell lysosomes help break
Head of…

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A fluid-filled space in the cytoplasm It contains a solution of sugars and salts
surrounded by a membrane called called the cell sap.
the tonoplast. Pushes the cytoplasm against the cell wall
making it turgid


Structure Function
Double membrane bound cells Respiration occurs in the
Inner membrane is folded…

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