Useful and Harmful Microbes

Q. Statement 1 : Chicken pox can be transmitted by an infected individual to a healthy person by direct contact.

Statement 2 : Chicken pox is a communicable disease.

1. Both the statements are correct
2. Both the statements are incorrect
3. Only statement 1 is correct
4. Only statement 2 is correct

Q. Which of the following serve as a preservative?

1. Oil
2. Spinach
3. Onion
4. Tomato

Q. Identify the microbes.

1. Bacteria
2. Ants
3. Virus
4. Algae
5. Fungi
6. Lice
7. Termite
8. Protozoans

Q. Which of the following statement/s hold true in case of Rhizobium?

1. They live in the root nodules of leguminous crops.
2. They help in the process of nitrogen fixation.
3. They can reduce the dependency and expenses on fertilisers.
4. They are oval cells and reproduce by budding.

Q. Yeast cell has a distinct cell wall.

1. True
2. False

Q. Pick the correct matches for all the microbes.
$\begin{array}{cc}\text{Column I}& \text{Column II}\\ 1.Penicillium& \text{a. Bakery products}\\ 2.Clostridium& \text{b. Source of antibiotics}\\ 3.Rhizobium& \text{c. Food poisoning}\\ \text{4. Yeast}& \text{d. Nitrogen fixation}\end{array}$

1. 1-a, 2-b, 3-d, 4-c
2. 1-c, 2-a, 3-b, 4-d
3. 1-d, 2-a, 3-b, 4-c
4. 1-b, 2-c, 3-d, 4-a

Q. Excess of vegetable oil is added in the preparation of pickle and the pickle jars are salted before the pickle is added into the jar. What is the purpose of doing so?

1. Pastuerization
2. Fermentation
3. Coagulation
4. Preservation

Q.

Which of the following statements are correct regarding probiotics?

i. Probiotics restore bacteria present in the intestine.

ii. Probiotics cause different diseases.

iii. Probiotics improve our immunity.

iv. Probiotics can be taken along with food.

1. i and ii

2. i, iii and iv

3. ii and iii

4. ii and iv

Q. Which of the following microbes causes malaria?

1. Microsporum
2. HIV
3. Plasmodium
4. Trichophyton

Q. Which of the following diseases can be treated using antibiotics?

1. AIDS
2. Malaria
3. Ringworm
4. Cholera