AS Biology

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AS Biology

• This is a product of the science department of
  Dartford Technology College

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Endoplasmic Reticulum

• Hen Dough Plaice Mike Wreck Tickle
  Hem.
• Complex system of sheet like double membranes
  continuous with the nuclear membrane
• Two types of ER
• smooth has no ribosomes attached (RER)
• rough has ribosomes attached (SER)

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Golgi Body

• Goal Guy Body
• Formed from small pieces of rough ER which form
  small vesicles which join to make a Golgi body

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My
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Mitochondria

• My Toe Con Dry Hair.
• Relatively large organelle
• Rod/sausage shaped 1um 5um
• Have a double membrane
• The outer controls the entry exit of materials
• Inner has many folds called cristae

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Centriole

• Cent Tree Hole.
• Two short bundles of hollow cylinders
  (microtubules) positioned at right angles to each
  other
• Found just outside the nucleus in a clear area of
  cytoplasm called the centrosome
• Wall of each centriole is made of 9 triplets of
  tubes arranged at an angle

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Ribosome

• Rye Bows Home.
• Small dense structures found in huge numbers.
• Can be attached to the rough ER of floating in
  the cytoplasm.
• Are about 20 25 nm in diameter in eukaryotic
  cells and slightly smaller in prokaryotic cells

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ER
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Chloroplast

• Claw Row Plaster (take away ER)
• Found inside photosynthetic tissues of plants
  (abundant in palisade mesophyll cells of leaves)
• Flat discs 2-10 um in diameter 1um thick
• Have a double membrane called the chloroplast
  envelope
• Inner membrane folded into a series of lamellae

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Nuclear Envelope

• Nuclear (bomb) Envelope.
• The nucleus is surrounded by a nuclear membrane /
  envelope
• Double membrane outer is continuous with the ER
• Nuclear pores in the membrane allow the passage
  of large molecules in out (eg messengerRNA)

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Nucleolus

• New Clay Hoe Lass.
• A spherical structure called the nucleolus is
  found in the nucleus this makes ribosomal RNA
  and assembles the ribosomes.