Microorganisms: Friend and Foe [CBSE (Central Board of Secondary Education) Class-8 Science]: Questions 1 - 8 of 46

Access detailed explanations (illustrated with images and videos) to 469 questions. Access all new questions- tracking exam pattern and syllabus. View the complete topic-wise distribution of questions. 3 Year Validity- Access Unlimited Times on Unlimited Devices.

View Sample Explanation or View Features.

Rs. 300.00 -OR-

How to register? Already Subscribed?

Question 1

Question MCQ▾

Micro-organisms which causing diseases in human beings are:

Choices

Choice (4)Response

a.

Algae

b.

Virus

c.

Bacteria, Protozoa

d.

Both b. and c. are correct

Edit

Question 2

Question MCQ▾

Fungi helps in the fermentation is

Choices

Choice (4)Response

a.

Moulds

b.

Yeast

c.

Mushrooms

d.

Mildews

Edit

Question 3

Question MCQ▾

Medicines obtained from the fungus is

Choices

Choice (4)Response

a.

Antigens

b.

Antibodies

c.

Antibiotics

d.

Antiseptics

Edit

Question 4

Question MCQ▾

Micro-organism used in the laboratory for research is:

Choices

Choice (4)Response

a.

Protozoa

b.

Fungi

c.

Bacteria

d.

Algae

Edit

Question 5

Question MCQ▾

Micro-organisms which causes disease in plants is:

Choices

Choice (4)Response

a.

Protozoa

b.

Bacteria

c.

Virus

d.

Both b. and c. are correct

Edit

Question 6

Question MCQ▾

Algae that increases the soil fertility is

Choices

Choice (4)Response

a.

Kelps

b.

Real Algae

c.

Nostoc and Anabaena

d.

Diatoms

Edit

Question 7

Question MCQ▾

Micro-organisms decompose organic waste such as

Choices

Choice (4)Response

a.

Cheese, pickles

b.

Vegetable peels, plants and animal waste

c.

Medicines

d.

Vaccines

Edit

Question 8

Question MCQ▾

Bacteria which causes the food poisoning is:

Choices

Choice (4)Response

a.

Escherichia coli

b.

Salmonella and Staphylococcus

c.

Spirilla

d.

Peneumococcus

Edit