Q.1: Microorganisms are classified into ____ groups.
Q.2: All microorganisms are single-celled.
Q.3: ___________ bacterium promotes the formation of curd.
Q.4: Microorganism like _________ only reproduce inside the cells of the host organism.
Q.5: Which of the following disease is caused by protozoa ?
Q.6: Which of the following microorganism lives in colonies ?
Q.7: The process of conversion of sugar into alcohol by adding yeast is called ______________.
Q.8: __________________ discovered the vaccine for small pox in 1798.
a) Edward Jenner
b) Louis Pateur
c) Alexander Fleming
Q.9: Yeast reproduces rapidly and produces __________ gas during respiration.
a) carbon dioxide
Q.10: The medicines which kill or stop the growth of disease causing microbes are called ____________.
Q.11: Some microbes can fix the nitrogen from the atmosphere to enrich the soil’s fertility. They are known as ____________________.
a) Biological nitrogen fixers
b) Nitrogen spreaders
c) Nitrogen producers
Q.12: Microbial diseases that can spread from an infected person to a healthy person through water, air, food or physical contact, are known as ___________ diseases.
Q.13: Why antibiotics are not effective against cold and flu ?
a) Because these are caused by bacteria.
b) Because these are caused by protozoa.
c) Because these are caused by virus.
Q.14: When a disease carrying microbe enters our body, the body produces _________ to fight the invader.
Q.15: __________ mosquito carries the parasite of malaria.
Q.16: Disease causing microbes are called ___________.
Q.17: In pasteurization method, the milk is heated at ______ o C for 15 to 30 seconds and then suddenly cooled down.
Q.18: _______________ discovered the Bacillus anthracis which causes anthrax disease.
a) Alexander Fleming
b) Robert Koch
c) Edward Jenner
Q.19: Which of these things you have to keep in mind while taking antibiotics ?
i) It should be prescribed by a qualified doctor.
ii) It should be costly.
iii) The patient should complete the course of antibiotics prescribed by the doctor.
a) Only iii
b) i and ii
c) i and iii
Q.20: Yeast can be grown on natural sugars present in grains like _____________.
a) wheat and barley
b) rice and wheat