1
Q
what’s a pathogen?
A
a microorganism that causes diseases, they harm the host by releasing damaging cells or toxins
all viruses are pathogens
bacteria, protoctista, fungi can also be pathogens
2
Q
what’s a virus?
A
a non-living organisms
only reproduce inside host cells (parasitic) - take over ribosomes and enzymes to make new virus particles.
they have no cells
contain a protein coat and strand of (genetic material) nucleic acids (DNA RNA)
3
Q
examples of viruses:
A
tobacco mosaic virus
-causes discolouration of the leaves of tobacco plants by preventing the formation of chloroplasts and limiting plant growth
influenza virus
-causes flu
HIV virus
-causes AIDS
- weakens the immune system
gsce biology
flashcards
Decks in class (28)
# Cards
-
characteristics of living organisms 1.11
-
eukaryotic organisms 1.218
-
prokaryotic organisms 1.310
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pathogens 1.43
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levels of organisation 2.15
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cell structures and functions 2.2, 2.3, 2.48
-
specialised cells and stem cells 2.5B, 2.6B11
-
biological molecules and food tests 2.7, 2.8, 2.922
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enzymes 2.10, 2.11, 2.12, 2.13 & 2.14B11
-
transport across membranes 2.15, 2.16, 2.1717
-
photosynthesis 2.18, 2.19, 2.20, 2.21, 2.22, 2.2328
-
diet 2.24, 2.25, 2.26, 2.33B30
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alimentary canal 2.27, 2.28, 2.29, 2.30, 2.31, 2.3230
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respiration and gas exchange 2.34, 2.35, 2.36, 2.37, 2.38, 2.39, 2.40B, 2.41B, 2.42B, 2.43B, 2.44B, 2.45B25
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humans gas exchange 2.46, 2.47, 2.48, 2.5013
-
transport in plants 2.51, 2.52, 2.53, 2.54, 2.55B, 2.56B, 2.57B, 2.58B13
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circulation - transport in animals 2.59, 2.60, 2.61, 2.62, 2.63B, 2.69, 2.65, 2.66, 2.68, 2.64B, 2.67, 2.4946
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excretion in plants 2.704
-
excretion 2.71, 2.72B, 2.73B, 2.74B, 2.75B, 2.76B, 2.77B, 2.79B, 2.78B14
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co-ordination and control 2.80, 2.82, 2.87, 2.88, 2.89, 2.90, 2.91, 2.92, 2.94, 2.86, 2.83, 2.84, 2.85, 2.81, 2.93, 2.78B, 2.72B, 2.95B63
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reproduction and inheritance 3.1, 3.2, 3.8, 3.9, 3.10B, 3.11, 3.12, 3.1348
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plants reproduction 3.3, 3.4, 3.5, 3.6, 3.726
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story of us 3.14, 3.15, 3.16B, 3.17B, 3.33, 3.22, 3.19, 3.20, 3.23, 3.24, 3.25, 3.21B, 3.26, 3.2746
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cell division 3.28, 3.29, 3.30, 3.31, 3.32, 3.33, 3.34, 3.36B, 3.37B23
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story of us part 2 3.18B, 3.35B, 3.38, 3.399
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ecology and the environment 4.1, 4.2, 4.5, 4.6, 4.7, 4.8, 4.9, 4.10, 4.13, 4.14, 4.15, 4.11B41
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harnessing biology 5.10, 5.11, 5.1, 5.2, 5.3, 5.4, 5.5, 5.6, 5.7, 5.8, 5.9B, 4.3B, 4.4B, 4.18B, 4.12, 4.16, 4.1762
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genetic revolution 5.12, 5.13, 5.14, 5.15, 5.16, 5.17B, 5.18B, 5.19B, 5.20B12
