NCERT Class 4 Science Solutions The World of Microbes Part 1

Multiple Choices

Q 1. I am a unicellular organism. I make breads and idles fluffy and spongy. Who am I?

a. Yeast

b. Bacteria

c. Algae

d. Protozoa

Answers: a

Q 2. Which among the following diseases is not caused by virus?

a. Polio

b. Measles

c. Dengue

d. Typhoid

Answers: d

Q 3. Penicillin a lifesaving medicine is made from …………………………….

a. Bacteria

b. Fungi

c. Algae

d. Virus

Answers: b

Q 4. I live in water. I cause diseases like malaria. Who am I?

a. Bacteria

b. Algae

c. Fungi

d. Protozoa

Answers: d

Q 5. Find the odd one out.

a. TB

b. Cholera

c. Polio

d. Typhoid

Answers: c

Find whether TRUE or FALSE

1. The microbes which cause common cold and belong to Viruses. True

2. Bacteria Lactobacillus helps in fermentation. False

3. Viruses are bigger than Bacteria, hence easy to identify. False

4. Microorganisms which are used to prepare medicines are called antibiotics. True

5. Saprophytic bacteria depend on living things. False