Question

C4. Multiple Choice Questions (MCQs): Choose the correct answer for each of the following.
1. Lactobacillus is a
(a) protozoan.
(b) bacterium
(c) fungus.
(d) virus.
2. Which of the following is used to make bread soft and porous?
(a) Yeast
(b) Bacteria
(c) Chlorella
(d) Aspergillus
3. The carrier of malaria-causing microorganism is
(a) housefly.
(b) cockroach.
(c) female Anopheles mosquito.
(d) rat.
4. Which of the following is an antibiotic?
(a) Penicillin
(b) Vaccine
(c) Alcohol
(d) Toxin
5. The process of conversion of sugar into alcohol in the absence of oxygen is called
(a) decomposition. (b) fermentation. (c) nitrogen fixation. (d) vaccination.
6. Salting of food items helps in preservation by
(a) increasing the acidity.
(b) removing water from the cells.
(c) lowering temperature.
(d) killing microbes.
DO AND LEARN
Observe and Tell​

Answer 1

Answer:

1) bacterium

2) Yeast

3) female anopheles mosquito

4) vaccine

5) fermentation

6) increasing the acidity

Answer 2

Answer:

1. b.Bacterium

2. a.Yeast

3. (c) female Anopheles mosquito.

4. (a) Penicillin

5. b) fermentation

6. d) killing microbes