Cells

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What is a eukaryotic cell?
A complex cell with a nucleus
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What is a prokaryotic cell?
A single called organism without a nucleus
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How is cristae in mitochondria formed?
The inner membrane is deeply folded
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What is the purpose of cristae?
It increases the surface area for enzymes involved in respiration within mitochondria
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Is a chloroplast single or double membraned?
Double
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What is the double membrane within chloroplasts made from?
Thylakoid membranes
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How are the granum formed within chloroplasts
They are formed when thylakoids membranes stack up
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Where are stroma found?
Chloroplasts
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What are storms within the chloroplasts?
Fluid filled matrix
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What is the function of the nucleus?
It protects the genetic material and has pores to allow molecules in and out
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"Chloroplasts have their own DNA and ribosomes to make enzymes needed for photosynthesis". True or False?
True
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Function of the nucleolus?
Makes ribosomes
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What is a lysome and its function
It is a membrane bound sac which contains digestive enzymes
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What is a vesicle?
Membrane bound sac which allows molecules to be transported
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Function of the Golgi body?
Packages and modifies materials to produce vesicles
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Function of the centrioles?
Makes spindle fibres for all cell division
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Function of the smooth Endoplasmic reticulum?
Produces lipids and steroids
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Function of the rough Endoplasmic reticulum?
Site of complex protein synthesis, with ribosomes attached to its surface
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What is an algal cell?
It's contains all of the same organelles as plant cells. They are unicellular or multicellular organisms.
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What does a eukaryotic cell contain?
Nucleus, nucleolus, ribosome, lysosome, vesicles, Golgi body, smooth and rough Endoplasmic reticulum
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What is the purpose of a cellulose cell wall?
Resists stretching and tearing due to osmotic pressure, this protects the cell against osmotic lysis
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What is the plant vacuole?
It contains cell sap, can hold up to 90% water and is responsible for the turgidity property of the cell.
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What are the features of a prokaryotic cell
DNA is circular and associated with proteins, it contains no membrane bond organelles and 70s organelles.
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What are the features of a bacteria cell?
Flagellum, plasmids, mesosomes, a cell wall made of meurin and a slime capsule
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What is a flaggellum and where is it found?
Within bacteria cells, it rotates to make the cell move.
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What are plasmids?
Small loops of DNA
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Function of mesosomes?
Site of aerobic respiration
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Function of slime capsules
Prevents dessication (protects from outside influence)
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What are the features of a fungal cell?
Cell wall made of chitin, they don't have chloroplasts so do not photosynthesise
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Define resolution
The ability to distinguish between objects that are close together
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How do you improve resolution?
Shorten the wavelength
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What effect does increasing magnification have on resolution?
It decreases
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What is homogenisation
It breaks the plasma membrane and releases organelles into solution
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Why use an ice cold solution?
It reduces enzyme action which may damage the cell
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Why use an isotonic solution?
Prevents the organelle shriviling or bursting from the net movement of water via osmosis
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Why use a buffered solution?
Prevents pH change which could denature proteins.
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Why is the solution filtered?
Removes any large pieces of tissue not broken up by the homogeniser
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Other cards in this set

Card 2

Front

What is a prokaryotic cell?

Back

A single called organism without a nucleus

Card 3

Front

How is cristae in mitochondria formed?

Back

Preview of the front of card 3

Card 4

Front

What is the purpose of cristae?

Back

Preview of the front of card 4

Card 5

Front

Is a chloroplast single or double membraned?

Back

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