Question

Put (V) mark against the correct choice :
los alcohol
(c) oxygen
1. Multiple Choice Questions
1. Yeast helps in the production of
(a) sugar
2. Pasteurisation of milk destroys its
(a) vitamins
(a) heat
(b) fat content
(c) bacteria
3. The bread or dosa dough rises because of the action of
(b) growth of yeast cells (©) kneading or grinding-
4. Salting the food helps to preserve it by
(a) extracting water from the cells (b) lowering its temperature (c) increasing its acidity.
5. The process of conversion of sugar into alcohol is called
(a) fermentation
(b) decomposition
(©) nitrogen fixation
6. Which of the following is a chemical preservative?
(a) Streptomycin
(b) Alcohol
(c) Sodium benzoate
7. Carrier of malaria causing pathogen is
(a) housefly
(b) cockroach
© female Anopheles
8. The micro-organism which lives in the root nodules of leguminous plants is a
(a) bacterium
(b) virus
(c) fungus
II. Fill in the blanks :
1. Microorganisms can be seen with the help of a
2 Viruses​

Answer 1

Answer:

Question is not full.Not understanding it........

Answer 2

Answer:

1. bread

2.bacteria

3.growth of yeast cells

4 . lowering in temperature

5.fermentation

6.streptomycin

7.female anopheles

8.bacterium

fill ups ..

microscope