CLASS 8 SCIENCE CHAPTER 2 MCQ WITH ANSWER 1


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Question 1.
The microorganism which contains chlorophyll
(a) Virus
(b) Fungus
(c) Algae
(d) All

Answer

Answer: (c) Algae



Question 2.
Alcohol is produced with the help of
(a) sodium chloride
(b) yeast
(c) nitrogen
(d) carbon dioxide

Answer

Answer: (b) yeast



Question 3.
Which of the following drug is an antipyretic?
(a) Insulin
(b) Alcohol
(c) Streptomycin
(d) Paracetamol

Answer

Answer: (d) Paracetamol



Question 4.
The process by which amount of nitrogen remains the same in the atmosphere is known as
(a) fermentation
(b) carbon cycle
(c) nitrogen cycle
(d) photosynthesis

Answer

Answer: (c) nitrogen cycle



Question 5.
Which bacteria helps in settling of curd?
(a) Rhizobium
(b) Lactobacillus
(c) Vibriocholarae
(d) Bacillus

Answer

Answer: (b) Lactobacillus



Question 6.
Tiny organisms which cannot be seen with the naked eyes are called
(a) microorganisms
(b) animals
(c) fungi
(d) bacteria

Answer

Answer: (a) microorganisms



Question 7.
Atmospheric nitrogen ¡s used for the synthesis of:
(a) plant proteins
(b) animal proteins
(c) plant carbohydrates
(d) none of these

Answer

Answer: (a) plant proteins



Question 8.
The fungus that is commonly used in bakery and beverage industries is
(a) Penicillium
(b) Yeast
(c) Agaricus
(d) Rhizopus

Answer

Answer: (b) Yeast



Question 9.
The microorganisms that cause diseases in human beings, plants and animals are called
(a) carriers
(b) mosquitoes
(c) pathogens
(d) antibodies

Answer

Answer: (c) pathogens



Question 10.
The status of algae in the aquatic food chain is
(a) consumers
(b) producers
(c) host
(d) small in size

Answer

Answer: (b) producers



Question 11.
Breathing in polluted air causes:
(a) kidney trouble
(b) heart problem
(c) respiratory diseases
(d) none of these

Answer

Answer: (c) respiratory diseases



Question 12.
Bacteria are ______ organisms.
(a) multicellular
(b) unicellular
(c) bicellular
(d) tricellular

Answer

Answer: (b) unicellular



Question 13.
Microorganisms are
(a) unicellular
(b) multicellular
(c) both (a) and (b)
(d) none of these

Answer

Answer: (c) both (a) and (b)



Question 14.
Spherical-shaped bacteria are called
(a) bacilli
(b) vibrio
(c) spirilla
(d) cocci

Answer

Answer: (d) cocci



Question 15.
Which of the following diseases is caused by a fungus?
(a) Cholera
(b) Common cold
(c) Ringworm
(d) Dengue

Answer

Answer: (c) Ringworm



Question 16.
The bacterium living in the root nodules of leguminous plants is:
(a) lactobacillus
(b) acetobactor
(c) rhizobium
(d) none of these

Answer

Answer: (c) rhizobium



Question 17.
In Pasteurisation the milk is heated to about:
(a) 100°C
(b) 50°C
(c) 70°C
(d) 110°C

Answer

Answer: (c) 70°C



Question 18.
Which of the following is air-borne disease:
(a) typhoid
(b) tuberculosis
(c) cholera
(d) polio

Answer

Answer: (c) cholera



Question 19.
Bacteria present in root nodules of pea
(a) Coli
(b) Plasmodium
(c) Rhizobium
(d) Penicillin

Answer

Answer: (c) Rhizobium



Question 20.
Which of the following disease is spread due to bacteria?
(a) Tuberculosis
(b) Measles
(c) Chicken pox
(d) Polio

Answer

Answer: (a) Tuberculosis



Question 21.
Virus is.
(a) non-living
(b) living as well as non-living
(c) living
(d) none of these

Answer

Answer: (b) living as well as non-living



Question 22.
Fungus can be seen with a
(a) microscope
(b) telescope
(c) magnifying glass
(d) both (a) and (c)

Answer

Answer: (d) both (a) and (c)



Question 23.
Scientist who discovered fermentation is
(a) Alexander Fleming
(b) Louis Pasteur
(c) John Mendel
(d) Edward Jenner

Answer

Answer: (b) Louis Pasteur



Question 24.
Tuberculosis is a disease caused by:
(a) bacterium
(b) protozoan
(c) virus
(d) malnutrition

Answer

Answer: (a) bacterium



Question 25.
Pathogens are also called
(a) germs
(b) antigen
(c) antibody
(d) carrier

Answer

Answer: (a) germs