WorksheetsChapter 39 test
Total questions: 10
Worksheet time: 10mins
Which of the following are the uses of microorganisms?
(1) production of soy sauce
(2) production of enzymes for biological washing powder
(3) production of human insulin
(1) and (2) only
(1) and (3) only
(2) and (3) only
(1), (2) and (3)
Which of the following correctly states the function of the water jacket of a fermenter?
To insulate the fermenter.
To maintain the pressure inside the fermenter.
To monitor the temperature inside the fermenter.
To remove the heat produced during fermentation.
Which of the following statements about beer-brewing is incorrect?
Barley grains are the raw material of beer.
During malting, starch is broken down into simple sugars.
Yeasts are added during the process of malting.
The bitter flavour of beer comes from hops.
During yogurt production, the pH of the mixture decreases. What causes this change in pH?
release of carbon dioxide
production of ethanol
breakdown of lactose
coagulation of milk proteins
Which substance produced by the yeasts causes the bread dough to rise?
ethanol
carbon dioxide
lactic acid
oxygen
Which of the comparisons between vaccines containing weakened pathogens and vaccines containing antigenic proteins is correct?
A
B
C
D
Which of the following statements about antibiotics is incorrect?
Antibiotics are chemicals produced by microorganisms to reduce competition.
Penicillin is produced by a genus of fungus called Penicillium.
Antibiotics can be used to prevent viral diseases.
Mass production of penicillin involves the inoculation of spores of the selected fungus in a fermenter.
How does pectinase help in fruit juice production?
Pectinase increases the protein content of the fruit juice.
Pectinase increases the amount of the fruit juice.
Pectinase breaks down the starch stored in the fruit cells.
Pectinase eliminates toxins from the fruit juice.
Which of the following statements about biogas is correct?
Archaebacteria are involved in biogas production.
Biogas is produced by aerobic decomposition of organic matter.
The major component of biogas is hydrogen gas.
Biogas is a non-renewable energy source.
Which of the following are the advantages of using genetically modified (GM) bacteria to produce human insulin?
(1) The human insulin produced by GM bacteria is easier to purify.
(2) The human insulin produced by GM bacteria has a lower chance of causing allergy.
(3) The production cost is low.
(1) and (2) only
(1) and (3) only
(2) and (3) only
(1), (2) and (3)
