Презентация, доклад по английскому языку на Тему Вирусы

частица, способная инфицировать клетки живых организмов. Вирусы являются облигатными паразитами — они не способны размножаться вне клетки. В настоящее время известны вирусы, размножающиеся в клетках растений, животных, грибов и бактерий (последних обычно называют бактериофагами).

20 to 300nm
On average, 50 times less bacteria
Can't be seen with a light microscope.
Pass through filters that do not allow bacteria

received an infectious extract from tobacco plants affected by mosaic disease

Rod-shaped particletobacco mosaic virus.
The numbers are:
the RNA genome of the virus,
a capsule consisting of only one protomer,
the Mature phase of the capsid.

Beyerink Martin Willem introduced the term "virus" (from Latin - "poison") to to identify infectious nature of certain filtered vegetable liquids'.

structure;
Viruses are able to live and reproduce, parasitizing inside other cells;
Most viruses cause diseases;
Viruses are very simpleм;
Viruses are on the border of living and non-living;
Each type of virus recognizes and infects only certain types of cells.