Chapter 2

Total Questions: 49

Time Limit: 5 minutes

Passing Score: 70%

⏱ Time Left: 5:00

Question 1 of 49

Can viruses reproduce outside a host organism?

Yes they can reproduce anywhere No they only reproduce inside host cells They reproduce in water only They reproduce in air only

Question 2 of 49

Which scientist discovered fermentation?

Louis Pasteur Alexander Fleming Edward Jenner Robert Koch

Question 3 of 49

Who discovered penicillin in 1929?

Alexander Fleming Louis Pasteur Edward Jenner Robert Koch

Question 4 of 49

Which disease is caused by protozoa?

Malaria Tuberculosis Polio Typhoid

Question 5 of 49

Which of these is a viral disease?

Chicken pox Typhoid Tuberculosis Cholera

Question 6 of 49

What type of microorganism is Lactobacillus?

Bacteria Virus Fungi Protozoa

Question 7 of 49

Which microorganism is used in the production of curd?

Lactobacillus Rhizobium Penicillium Aspergillus

Question 8 of 49

What is the percentage of nitrogen in our atmosphere?

78% 65% 82% 90%

Question 9 of 49

Which scientist discovered vaccination for smallpox?

Edward Jenner Louis Pasteur Alexander Fleming Robert Koch

Question 10 of 49

What happens to bread in moist conditions?

Develops greyish white patches Becomes harder Changes color to brown Dissolves in moisture

Question 11 of 49

Which mosquito spreads malaria?

Female Anopheles Male Anopheles Female Aedes Male Aedes

Question 12 of 49

What was the year of smallpox vaccine discovery?

1798 1857 1929 1876

Question 13 of 49

What is the process of conversion of sugar into alcohol called?

Fermentation Pasteurization Vaccination Nitrogen fixation

Question 14 of 49

Which bacteria helps in nitrogen fixation?

Rhizobium Lactobacillus Penicillium Aspergillus

Question 15 of 49

What temperature is milk heated to during pasteurization?

70°C 100°C 50°C 85°C

Question 16 of 49

Which scientist discovered the bacterium causing anthrax?

Robert Koch Louis Pasteur Edward Jenner Alexander Fleming

Question 17 of 49

What is the common carrier of communicable diseases?

Housefly Butterfly Spider Ant

Question 18 of 49

What causes food poisoning?

Toxic substances produced by microbes Stale food Hot food Cold food

Question 19 of 49

Which disease is caused by bacteria?

Tuberculosis Chicken pox Polio Measles

Question 20 of 49

What is the primary function of antibiotics?

Kill disease-causing microbes Increase immunity Provide nutrients Reduce fever

Question 21 of 49

Which microorganism is used in baking bread?

Yeast Bacteria Protozoa Virus

Question 22 of 49

What helps preserve pickles?

Salt and oil Sugar Vinegar only Water

Question 23 of 49

What are disease-causing microorganisms called?

Pathogens Antibiotics Vaccines Carriers

Question 24 of 49

Which gas is produced by yeast during fermentation?

Carbon dioxide Oxygen Nitrogen Hydrogen

Question 25 of 49

What is the mode of transmission for cholera?

Water and food Air Direct contact Mosquito bite

Question 26 of 49

How does virus flu spread?

Through air Through water Through food Through touch

Question 27 of 49

What type of microorganism is yeast?

Fungi Bacteria Virus Protozoa

Question 28 of 49

Which scientist discovered pasteurization?

Louis Pasteur Alexander Fleming Edward Jenner Robert Koch

Question 29 of 49

Where do microorganisms not live?

All can live everywhere Ice cold climate Hot springs Marshy lands

Question 30 of 49

What happens during nitrogen fixation?

Conversion of nitrogen to compounds Release of nitrogen to air Breakdown of nitrogen Removal of nitrogen

Question 31 of 49

Which disease spreads through mosquito bite?

Malaria Cholera Tuberculosis Typhoid

Question 32 of 49

What is produced during fermentation of sugars?

Alcohol Water Salt Vinegar

Question 33 of 49

Which microorganism causes citrus canker?

Bacteria Fungi Virus Protozoa

Question 34 of 49

What is the common method of preserving fish?

Salting Heating Cooling Drying

Question 35 of 49

Which substance is not used in food preservation?

Detergent Salt Sugar Vinegar

Question 36 of 49

What should be done to prevent mosquito breeding?

Not letting water collect Using mosquito nets Using repellents Using antibiotics

Question 37 of 49

What helps preserve jams and jellies?

Sugar Salt Oil Vinegar

Question 38 of 49

Which disease is prevented by pulse polio drops?

Polio Malaria Tuberculosis Cholera

Question 39 of 49

What is vaccination?

Introducing weak/dead microbes Giving antibiotics Providing immunity boosters Killing all microbes

Question 40 of 49

What causes yellow vein mosaic of bhindi?

Virus Bacteria Fungi Protozoa

Question 41 of 49

Which microorganism helps in waste decomposition?

Bacteria Virus Protozoa None of these

Question 42 of 49

What is produced from microorganisms for medicines?

Antibiotics Vaccines Proteins Vitamins

Question 43 of 49

What happens to organic waste in soil?

Gets decomposed by microbes Remains unchanged Disappears naturally Becomes toxic

Question 44 of 49

What is the function of blue-green algae in soil?

Fix nitrogen Produce oxygen Kill harmful bacteria Remove water

Question 45 of 49

How do antibodies help?

Fight disease-causing microbes Produce vitamins Generate energy Break down food

Question 46 of 49

What is the purpose of pasteurization?

Kill harmful microbes Improve taste Add nutrients Remove fat

Question 47 of 49

Which disease is caused by bacteria in foods?

Food poisoning Common cold Chicken pox Measles

Question 48 of 49

What happens during decomposition of organic matter?

Breaks into simple substances Vanishes completely Turns toxic Remains unchanged

Question 49 of 49

Which microorganism causes rust of wheat?