Microorganisms friends and foe Worksheet-9
Multiple Choice Questions:
Sodium meta-bisulphite is a/an-
(A) Antibiotic (B) Antibody (C) Preservative (D) All
How sugar works as preservative?
(A) By reducing moisture content
(B) By reducing temperature
(C) By increasing temperature
(D) All
What is the effect of low temperature on microorganism?
(A) It reduces growth (B) It kills them
(C) Both (D) None
The process of pasteurization was discovered by-
(A) Hill (B) Louis (C) Mendel (D) None
Which one is a symbiotic nitrogen fixer?
(A) Lactobacillus (B) HIV
(C) Rhizobium (D) Blue green algae
Multiple Responses:
Microorganisms are classified into-
(A) Protists (B) Bacteria
(C) Viruses (D) Fungi
(E) Algae (F) Plantae
Select the diseases caused by bacteria-
(A) AIDS (B) Flu (C) Typhoid
(D) Cold (E) Dysentery (F) Tuberculosis
Select the viral diseases-
(A) AIDS (B) Flu (C) Typhoid
(D) Cold (E) Dysentery (F) Tuberculosis
What are the roles of bacteria in environment?
(A) Preparation of curd, bread and cake
(B) To study evolution
(C) Cleaning up of the environment
(D) Increases soil fertility
(E) To study cellular organelles
What are the commercial uses of fungi?
(A) Alcoholic fermentation
(B) Lactic acid fermentation
(C) Production of wine
(D) Used for making breads and cakes
(E) Used for making curd
Which of these are antibiotics?
(A) Paracetamol (B) Streptomycin
(C) Ibuprofen (D) Erythromycin
(E) Tetracycline
Select the diseases which can be prevented by taking vaccines against them-
(A) Cold (B) Hepatitis (C) AIDS (D) Cholera
(E) Smallpox
What are the means of by which communicable diseases can be transmitted?
(A) Air (B) Food
(C) Physical touch (D) Water
(E) Shaking hands
Select the animals diseases caused by microorganisms-
(A) Anthrax (B)Typhoid (C) Elephantiasis
(D) Foot and mouth disease (E) Lymphoma
Which of the following is/are chemical preservative?
(A) Sodium oxalate (B) Sodium benzoate
(C) Sodium cholate (D) Sodium meta-bisulphate
(E) Sodium taurocholate
What are the preservative methods used at domestic level?
(A) Using salt (B) Using sodium benzoate
(C) Using oil and vinegar (D) Heat and cold treatment
(E) Using filtrate
Answer key:
(C)
(A)
(A)
(B)
(C)
(A,B,D,E)
(C,F)
(A,B,D)
(A,C,D)
(A,C,E)
(B,D,E)
(B,D,E)
(A,B,D)
(A,D)
(B,D)
(A,C,D)
