Advertisements
Advertisements
Question
How disease causing microorganisms enter into human beings?
Solution
The disease-causing microbes are called pathogens. They enter into the body through –
- Cuts and wounds in the skin, mouth, or nose.
- Some pathogens are found in the air and enter into a healthy person by breathing. When a patient sneezes, droplets containing microbes spread into the air.
Example: Tuberculosis, Flu. - Some pathogens enter our body through food and water contaminated with the pathogen.
Example: Cholera. - Pathogens also enter through blood transfusion from an infected to a healthy person.
Example: Aids
APPEARS IN
RELATED QUESTIONS
Microorganisms can be seen with the help of a _________.
Match the organisms in Column A with their action in Column B.
| A | B | ||
| (i) | Bacteria | (a) | Fixing Nitrogen |
| (ii) | Rhizobium | (b) | Setting of curd |
| (iii) | Lactobacillus | (c) | Baking of bread |
| (iv) | Yeast | (d) | Causing Malaria |
| (v) | A protozoan | (e) | Causing Cholera |
| (vi) | A Virus | (f) | Causing AIDS |
| (g) | Producing antibodies |
What are the major groups of microorganisms?
Rewrite the following statement using correct of the option and explain the completed statement.
Process of -- -- -- -- of milk proteins occurs due to lactic acid.
Who am I?
I can produce my replica.
Who am I?
I am green, but don't have organs.
What are micro-organisms?
What are the main features of a microorganism?
Microorganisms are measured in _______.
Mark the correct one as:
Assertion: Malaria is caused by Protozoa.
Reason: The disease is transmitted by mosquito.
Name the four major groups of Microbes.
Unscramble the jumbled word underlined in the following statement.
Cells of our body produce santiidobe to fight pathogens.
While returning from the school, Boojho ate chaat from a street hawker. When he reached home, he felt ill and complained of stomach ache and fell ill. What could be the reason?
The major constituent of vinegar is ______.
‘Cry’ protein is produced by the bacteria ______.
Yeasts are a rich source of ______.
Vaccines stimulate the body to produce ______ against the ______ in the microbes.
Assertion: Bacillus Thuringiensis is a biocontrol agent.
Reason: It produces a protein called ‘cry protein’ which kills insect larva.
Name the scientist who first discovered the penicillin antibiotic. Can you name any other known antibiotic?
