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WorksheetsBiology Revision - Immunity
Total questions: 9
Worksheet time: 5mins
a member of a large group of unicellular microorganisms which have cell walls but lack organelles and an organized nucleus, including some which can cause disease.
(a)
Select the true statements about bacteria:
Bacteria are unicellular microorganisms
Bacteria can only multiply in the cells of living organisms
They lack organelles and an organised nucleus
Bacteria always cause disease
an infective agent that typically consists of a nucleic acid molecule in a protein coat, is too small to be seen by light microscopy, and is able to multiply only within the living cells of a host
(a)
What is unique about a virus?
They can only multiply in the cells of a host
They are toxic
They are able to reproduce on surfaces
a bacterium, virus, or other microorganism that can cause disease
(a)
What is an example of a pathogen?
Bacteria
Salmonella
Influenza
Penicillin
a medicine (such as penicillin or its derivatives) that inhibits the growth of or destroys microorganisms
(a)
a toxin or other foreign substance which induces an immune response in the body, especially the production of antibodies. They are proteins that are found on the surface of the pathogen
(a)
the organs and processes of the body that provide resistance to infection and toxins. Organs include the thymus, bone marrow, and lymph nodes.
(a)
