Question

Microorganisms
Fill in the blanks:
2. ___________ is a skin disease in human caused by fungus.
3. The female Aedes mosquito is a carrier of the ________.
4. _______, ______ are chemicals that inhibit microbial growth.
5. When an antigen enters the body, the body produce proteins called ________ to destroy it.
6. A _________ is used to study microbes.
7. ________ is a unicellular fungus.
8. ________ made the first vaccine.
9. ________ microbe is present in our intestine as a friendly microbes.
10. ________ can kill disease causing microbes without causing injury to body.
11. _________ are on the borderline of living and non- living.
12. _______and ______ are two diseases caused by bacteria.
13. In legumes, the root nodules contain the bacterium_________.
14. Yeast is added to dough to produce _________which makes the dough rise.
15. The heating of milk upto to 70*C& then suddenly cooling is called _________.

Fill in the blanks:
1. Microorganisms can be seen with the help of a ………………. .
2. Blue green algae fix ……………. directly from air to enhance fertility of soil.
3. Alcohol is produced with the help of ………………… .
4. Cholera is caused by ……………….. .
5. The female Aedes mosquito is a carrier of the ………………..
B. Tick (œ“) the correct option:
1. Yeast is used in the production of:
(a) sugar​​(b) alcohol​​(c) hydrochloric acid​​(d) oxygen
2. The following is an antibiotic:
(a) Sodium bicarbonate​(b) Streptomycin​(c) Alcohol​​(d) Yeast
3. Carrier of malaria-causing protozoan is:
(a) female Anopheles mosquito​(b) cockroach​(c) housefly​​(d) butterfly
4. The most common carrier of Communicable diseases is:
(a) ant​​(b) housefly​​(c) dragonfly​​(d) spider
5. The bread of idli dough rises because of:
(a) heat​​(b) grinding​​(c) growth of yeast cells​​(d) kneading
6. The process of conversion of sugar into alcohol is called:
(a) nitrogen fixation​​(b) moulding​​(c) fermentation​​(d) infection
F. Choose the correct options.
1. Vinegar is commonly known as
a. Citric acid ​b. Acetic acid ​c. Carbonic acid ​d. None
2. Mumps is a ——- disease.
a. Bacterial ​b. Virus ​c. Protozoan ​​d. Fungal
3. Which of these can be prevented by vaccination?
a. Tetanus ​b. Polio ​c. Measles ​d. All of these
4. ———- helps in the formation of curd.
a. Lactobacillus ​b. Rhizobium ​c. Coccus ​d. None of these
5. Jams and jellies are preserved with the help of
a. Sugar ​b. Chemical preservatives ​c. Salt ​d. Both a & b
6. Which of the following are methods of preservation?
a. Canning ​b. Freezing ​c. Vacuum packing ​​d. All of the above
7. Which of these are protozoans?
a. Euglena ​b. Spirogyra ​c. Paramoecium ​d. a & c both
8. The special cells produced in response to a disease causing microbe are called
a. Antigens ​b. Antibodies ​c. Immunity​ d. None of above
9. These are diseases caused by bacteria
a. Cholera ​b. Typhoid ​c. Tetanus ​d. All of these
10. Which of these diseases get transmitted through animals?
a. Tetanus ​b. Rabies ​c. Malaria ​d. Typhoid
C. Match the following:
‘A’
‘B’
1. Bacteria
a. Fixing nitrogen
2. Rhizobium
b. Setting of curd
3. Lactobacillus
c. Baking of brea
4. Yeast
d. Causing malaria
5. A protozoan
f. Causing cholera
6. A virus
g. Causing AIDS

h. Producing antibodies

Answer 1

Answer:

Democracy refers to a form of government in which the people either have the authority to choose their governing legislators, or the authority to decide on legislation.

Answer 2

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