The use of lasers to build up an image via a computer by scanning an object in the microscope.
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How do viruses reproduce?
They can only reproduce inside another living cell, a 'host cell'. The release of new viruses destroys the host cell, and the released viruses go on to attack new host cells.
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How do bacteria reproduce?
Asexually by dividing into two/.
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How to yeasts reproduce?
Asexually by budding.
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What is present in some (but not all) bacteria?
Capsule, Flagella and Pilus.
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What may a yeast cell contain more than one of?
Vacuole
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What do most algal cells contain? What is often absent in an algal cell?
Flagellum. Vacuole and Eyespot.
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What is the function of the nucleus in a plant and animal cell?
To control the activities of the cell (via DNA)
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What is the function of the cytoplasm in a plant and animal cell?
Here, most of the chemical reactions of the cell take place.
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What is the function of the vacuole in a plant cell?
It is a space filled with liquid sap which stores nutrients.
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What is protein made of?
A chain of smaller molecules called amino acids.
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Why does boiling denature an enzyme?
Because the heat causes bonds in the active site to break, changing its shape.
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Name and explain one commercial use of enzymes?
Biological washing detergent. Digestive enzymes are added to detergent to break down stains. E.g., lipase to break down grease stains and protease to break down grass stains.
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What does mitosis produce new cells for?
Growth, repair of old tissues and to replace worn out cells.
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How many daughter cells are produced in a) mitosis? and b) meiosis?
a) 2. b) 4.
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What is the difference in growth forms between animals and plants?
Animals usually have a compact grown form (i.e. non-branching0, whereas plants usually have a spreading, branching growth form.
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What do the spreading body forms of plants allow?
A greater surface area for absorbing light for photosynthesis.
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Where can stem cells be found?
Embryos, some adult tissues (e.g. bone marrow), in the growing points (meristems) of plants.
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Why do many oppose the use embryonic stem cells? Why do some feel that the use is justified?
Many oppose because an embryo is destroyed. However, some feel the use is justifiable as the embroys are grown in a laboratory so are not the result of natural conception.
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Other cards in this set
Card 2
Front
How do viruses reproduce?
Back
They can only reproduce inside another living cell, a 'host cell'. The release of new viruses destroys the host cell, and the released viruses go on to attack new host cells.
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