SLS Bio11 Virus SJ
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Antibody | a protein produced in the blood that fights diseases by attacking and killing harmful bacteria
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| Antigen | a substance that causes the production of antibodies in the body
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| DNA | deoxyribonucleic acid: the chemical, present at the centre of the cells of living things, that controls the structure and purpose of each cell and carries genetic information during reproduction
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| Host cell | a living cell in which a virus reproduces
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| Lymphocyte | a type of white blood cell involved in fighting disease and infection in the body
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| Lysogenic cycle | one of two cycles of viral reproduction
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| Lytic cycle | Viral reproduction. The viral DNA exists as a separate molecule within the bacterial cell, and replicates separately from the host bacterial DNA.
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| Membranous envelope | All viruses lack cell membranes but some animal viruses have a membrane similar in composition to a cytoplasmic membrane surrounding their capsids called an envelope. This is a membrane envelope
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| mucous membrane | A lubricating membrane lining all body passages and cavities. Examples of mucous membranes are those lining the mouth, nasal passages, vagina and urethra
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| nucleic acid core | The part of a nuclear reactor where binary fission occurs.
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| phagocytic white blood cell | A cell that engulfs and absorbs waste material, harmful microorganisms, or other foreign bodies in the bloodstream and tissues
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| primary line of defence | a combination of physical and chemical barriers that prevent all types of foreign agents from penetrating the outer layer of the body. No specific foreign agent is targeted at this level
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| protein capsid | The protein coat surrounding the nucleic acid of a virus
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| RNA | ribonucleic acid, a nucleic acid present in all living cells
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| secondary line of defence | White blood cells are found throughout the body and if a pathogen penetrates the first line of defence these cells play a role in inhibiting or destroying the pathogen before it harms the body.
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| tertiary line of defence | f a foreign agent penetrates the non-specific barriers, there is a third line of defence available – the specific immune response.
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| viral specificity | viral specificity means that a virus is selective in the organisms it infects, the type of cells and the disease it produces.
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| white blood cell | Leukocyte, help fight infections by attacking bacteria, viruses, and germs that invade the body
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