Topic 6 Biology

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Why do insects on a corpse change over time?
Each species of insect changes the conditions of the body, When a new species arrives sometimes they feed on other insects
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Why might the exact age of a corpse infested with insects cannot be given?
The body might be indoors
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how can a more precise time of death, can be determined using insect evidence?
Look for stage of development of insects for example when the insects have hatched or if they are in they’re egg stage. The ambient temperature also has to be taken into account.
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What other evidence, not involving insects, might help to determine the time of death?
Rigor of muscles, core temperature of body and decomposition
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How can killing virus infected cells help control the infection of the human body?
The cells are killed before the virus has time to replicate, therefore fewer viruses can infect new cells
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What is one disadvantage of T cels killing infected human cells?
Loss of cells could damage functioning of tissues
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Suggest one reason why some mutations of HIV reduce the rate of production of new virus particles
A mutation could make the virus difficult to replicate its DNA
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Explain the role of T memory cells?
More rapid activation of T killer cells, More rapid response if same antigen re-infects
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What is the difference between viruses and bacteria with genetic information?
Bacteria sometimes have plasmid, Bacteria always have DNA, some viruses have DNA and some RNA
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Card 2

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Why might the exact age of a corpse infested with insects cannot be given?

Back

The body might be indoors

Card 3

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how can a more precise time of death, can be determined using insect evidence?

Back

Preview of the front of card 3

Card 4

Front

What other evidence, not involving insects, might help to determine the time of death?

Back

Preview of the front of card 4

Card 5

Front

How can killing virus infected cells help control the infection of the human body?

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Preview of the front of card 5
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