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WorksheetsMicro organisms - Grade 8 ANNUAL EXAM
Total questions: 25
Worksheet time: 13mins
Identify Me
I may be found as a single cell or as multiple cells.
I have a cell wall and chloroplast ,but i don't have roots,shoots or leaves
Bacteria
Virus
Algae
Fungi
Which of the following is not a bacteria
E.Coli
Salmonella
Bacillus Anthracis
Bacteriophage
Antibiotics are not useful against viral infections
False
True
Which among the following insects is vector of the Dengue virus
Female Anopheles Mosquito
Female Aedes Mosquito
House fly
Cockroach
Rhizobium bacteria helps in
Denitrification
Nitrogen fixation
Biogas Fermentation
All of these
Disease causing microorganisms are called
Antibodies
Vaccines
Antigen
Pathogen
When an antigen enters our body, our body produces
Vaccines
Pathogens
Toxins
Antibodies
The period between the infection and the appearance of symptoms is called
Incubation period
Vaccination period
Gestation period
Plants get their nitrogen from the soil in the form of
Nitrates
Nitrogen dioxide
Nitric acid
Identify this picture
Amoeba
Spirogyra
Penicillium
Bacillus
Which of this is not a bacterial infection
Typhoid
Polio
Cholera
Tuberculosis
Penicillin was discovered by
Edward Jenner
Louis Pasteur
Alexander Fleming
Robert Brown
Antibiotics
kill disease-causing microorganisms
slow down the growth of disease-causing microorganisms
convert sugar into alcohol
speed up the growth of micoorganisms
The process of conversion of sugar into alcohol is known as ...
Budding
Fusion
Fermentation
Fixation
Consumption of food spoiled by some micro-organisms causes ____.
Food-poisoning
Cancer
Lungs
None of these
Which of the following statements are True/False? (A) Boiling kills many organisms. (B) Low temperature inhibits the growth of microbes.
Only A
Only B
Both A and B
None of these
Conversion of nitrogen to ammonia is
nitrification
phosphorylation
denitrification
nitrogen fixation
Who discovered Fermentation ?
Edward Jenner
Alexander Fleming
Louis Pasteur
Selman Waksman
Dysentery is a _______ disease.
bacterial
viral
protozoan
fungal
