Question 1.
The microorganism which contains chlorophyll
(a) Virus
(b) Fungus
(c) Algae
(d) All
Answer: (c) Algae
Question 2.
Alcohol is produced with the help of
(a) sodium chloride
(b) yeast
(c) nitrogen
(d) carbon dioxide
Answer: (b) yeast
Question 3.
Which of the following drug is an antipyretic?
(a) Insulin
(b) Alcohol
(c) Streptomycin
(d) Paracetamol
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: (c) nitrogen cycle
Question 5.
Which bacteria helps in settling of curd?
(a) Rhizobium
(b) Lactobacillus
(c) Vibriocholarae
(d) Bacillus
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: (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: (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: (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: (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: (b) producers
Question 11.
Breathing in polluted air causes:
(a) kidney trouble
(b) heart problem
(c) respiratory diseases
(d) none of these
Answer: (c) respiratory diseases
Question 12.
Bacteria are ______ organisms.
(a) multicellular
(b) unicellular
(c) bicellular
(d) tricellular
Answer: (b) unicellular
Question 13.
Microorganisms are
(a) unicellular
(b) multicellular
(c) both (a) and (b)
(d) none of these
Answer: (c) both (a) and (b)
Question 14.
Spherical-shaped bacteria are called
(a) bacilli
(b) vibrio
(c) spirilla
(d) cocci
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: (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: (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: (c) 70°C
Question 18.
Which of the following is air-borne disease:
(a) typhoid
(b) tuberculosis
(c) cholera
(d) polio
Answer: (c) cholera
Question 19.
Bacteria present in root nodules of pea
(a) Coli
(b) Plasmodium
(c) Rhizobium
(d) Penicillin
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: (a) Tuberculosis
Question 21.
Virus is.
(a) non-living
(b) living as well as non-living
(c) living
(d) none of these
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: (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: (b) Louis Pasteur
Question 24.
Tuberculosis is a disease caused by:
(a) bacterium
(b) protozoan
(c) virus
(d) malnutrition
Answer: (a) bacterium
Question 25.
Pathogens are also called
(a) germs
(b) antigen
(c) antibody
(d) carrier
Answer: (a) germs